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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , CHAPTER – 1 THE SOLID STATE, 2011, 1. Name a compound having the body-cantered cubic unit cell, crystal lattice, 1, 2. A uni-univalent ionic crystal AX is composed of the following, radii (arbitrary units)., A+ X1.0, , 2.0, , ©Luwang Sanggai, , Assuming that ions are hard spheres, predict giving, reasons, whether the, crystal will have the, sodium chloride or cesium chloride structure. Calculate the, volume of the unit cell., 3, , 2012, , 1., In a compound, atoms of element Y fo1111 CCP lattice, and those of, element X occupy ½rd of tetrahedral voids., The formula of the compound will be, 1, A) X2 Y, B) X3Y, C) X4Y3, D) X2Y3, How can you determine the atomic mass of an unknown, 2., metal if you, know its density and the dimensions of the unit, cell? Explain your answer., 2, , 1|Page, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2013, , 1., What type of imperfection occurs when a crystal misses equal, number of, cations and anions from their normal lattice sites?, 1, 2., Draw the vapour pressure temperature curves showing the depression of, freezing point of, the solution of a non-volatile solute from that o solvent. In the graph, mark the points which represent the freezing p of pure solvent and, solution., 2, , ©Luwang Sanggai, , 2014, 1., Some phenomenon polar is crystals called when heated, produce small electrical current. The phenomenon is called, A. Ferroelectricity, B. Anti-ferroelectricity, C. Pyro-electricity, D. Piezo-electricity., , 1, , 2. Name the types of semi-conductors produced when, Germanium (Ge) is doped separately with Boron (B) and, Aluminum (Al). Which one will be a better semiconductor and, why?, 1 +I+ 1 = 3, , 2|Page, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2015, 1. Define, (i) unit cell (ii) coordination number, in relation to crystalline, solids., 2, 2. Explain the Schottky defect in Stoichiometric crystals. What is the, consequence of Schottky and Frenkel defects in crystals?, 2, 2016, , 1. What is semiconductor? Mention the type of semiconductor, obtained when silicon is doped with arsenic., , 2, , ©Luwang Sanggai, , 2. The density of a face cantered cubic element (atomic mass = 60.2, 2, amu) is 6.25g cm-3. Calculate the edge of the unit cell., 2017, 1. Write two differences between crystalline solids and amorphous, 2, solids., 2. What is Schottky defect?, 1, 3. A ferromagnetic substance becomes a permanent magnet when, it is placed in a magnetic field because......................, A) All the domains get oriented in the direction of magnetic field., B) All the domains get oriented in the direction opposite to the, direction of magnetic field., C) Domains get oriented randomly., D) Domains are not affected by magnetic field, , 2018, 1. What are rectifiers and transistors? How are they made?, 3|Page, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573, , 2

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2. Aluminium metal crystallizes in a cubic structure in which the, edge of the unit cell is 504 pm. Determine the type of unit cell if, 2, the density of Al is 2.7 g cm-3 ., , 2019, , ©Luwang Sanggai, , 1. What is meant by imperfections in solids? What is the effect of, interstitial defect on the density of a solid?, 2, 2. Element A and B form a crystalline compound. In the crystal,, atoms of element A form cubic closed packed structure and, atoms of element B, occupy 1/ 3rd of tetrahedral voids., Calculate the formula of the compound., 2, , 2020, , 1. KBr crystal does not show Frenkel defect. Give reason. 1, 2. Atoms of element 8 (as anions) make CCP and those of element, A (as cations) occupy all the octahedral voids. Predict the formula, of the compound., 2, 2+, 3. What type of defect can arise when Sr (as SrCl2) is added as, impurity in ionic solid NaCl? Justify your answer., 2, , 4|Page, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , CHAPTER 2 - SOLUTIONS, 2011, 1. Explain why equimolar aqueous solutions of sodium chlo1ide, and sodium sulphate are not isotonic., 2, 2. An aqueous solution freezes at 272 - 07 K while pure water, freezes at 273K.Determine the molality and boiling point of the, solution. Given Kf = 1.86 K/m ; Kb =0.512K/m., 3, , ©Luwang Sanggai, , 2012, 1. A solution containing 5g of a solute dissolved in 250cm3 of, water gave an osmotic pressure of 4.5 atmosphere at 27° C·, Calculate the boiling point of the solution. The molal elevation, constant for water is 0.52 ° C per 1OOO g., 5, , 2013, 1. Draw the vapour pressure - temperature curves showing the, depression, of freezing point of the solution of a nonvolatile solute from that o solvent., In the graph mark the, points which represent the freezing p of pure solvent and, solution., 2, 2. Acetic acid dimerises in benzene. When 1.65 g of acetic acid is, dissolved, in 100 g of benzene the boiling point is raised by, 0·36° C. Calculate the, van 't Hoff factor and degree of, association of the acid in benzene., (Molal elevation, -1, constant of benzene is 2·5 K kg mol l )., 3, , 5|Page, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2014, 1. Which one or the following concentrations is not affected by, temperature?, (A) Normality, (B) Molality, (C) Molarity, (D) Formality, 2. Establish a relationship between mole-fraction of solute and, molality of a binary dilute solution., 3. Osmotic pressure of a solution containing 3.5g of dissolved, protein per 50c.c. of a solution is 25mm (Hg) at 37°C., Calculate the molar mass of the protein., 2, , 1, , 2, , ©Luwang Sanggai, , 2015, 1. A solution of glucose in water is labelled as 10% w/w. What, would be the molality and mole fraction of each components in, the solution?, 2, 2. Explain, with the help of vapour pressure curves, why a solution, containing non-volatile solute has higher boiling point than, pure solvent., 3, , 2016, 1. State (a) Raoult's law for volatile solid, (b) Van't Hoff factor., , 2, , 2. Calculate the osmotic pressure of 5% solution of cane sugar, at 15° C. [R = 0.082 litre atm K-1moJ-1 ], 3, 6|Page, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2017, 1. What are the characteristics of ideal solution?, 1, 2. Why does vapour pressure of a liquid decrease when a nonvolatile solute is added into it?, 1, 3. What is a Raoult's law? The vapour pressure of a 5% aqueous, solution of a non-volatile organic substance is 373 K is 745, mm. Calculate the molar mass of the solute., 3, , ©Luwang Sanggai, , 2018, , 1. Calculate the molality and mole fraction of a solution, containing 2.5g ethanoic acid (CH3COOH) in 75g of, benzene.2, 2. What is an ideal solution? What are the necessary conditions, for a solution to be ideal?, 3, Why is Henry's law not applicable to dissolution of hydrogen, chloride gas in water?, 1, , 2019, , 1. Define Van't Hoff factor. What would be the value of Van't Hoff, factor for a dilute aqueous solution of Na2SO4?, 1, 2. Calculate the elevation in boiling point when 300g of urea,, CO(NH2)2 is dissolved in 2500g of water., 2, (Given: Kb for water = 0.52 K Kg moJ-1), 7|Page, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2020, 1. (a)Define colligative properties., (b) Establish the relationship between the relative lowering of, vapour pressure· of a solution and· mole fraction of the solute in, it when the solvent alone is volatile., (c) The Van't Hoff factor (1) of a solution is more than one., What does it indicate?, 1+3+1=5, , ©Luwang Sanggai, , CHAPTER 3 – ELECTROCHEMISTRY, 2011, 1. What is emf of a cell? 1, 2. (i), Why is anode negatively charged in an electrochemical, cell?, (ii) Why is rusting of iron quicker in saline medium?, (iii) Why 0.1M HCl has greater /\αm value than 0.1M NaCl?, 1 +1+1 =3, , 2012, 1. State and explain Kohlrausch law. How can it help to Calculate?, i) /\0 for a weak electrolyte, and, 1+2+2=5, ii), , degree of dissociation of a weak electrolyte?, , 8|Page, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2013, 1. A silver chloride sol was prepared by treating excess of KCl, with a limited amount of silver nitrate solution. On subjecting, the prepared sol to electrophoresis and electro-osmosis which, of the following phenomena could be observed? 1, , ©Luwang Sanggai, , (A), Migration of the colloidal silver chloride particles, towards the cathode, (B), Migration of the colloidal silver chloride particles, towards the anode, , (i), , (C), Haphazard movement of the colloidal silver chloride, particles, (D), Increasing the level of dispersion medium in the, anodic compartment, of the electro-osmosis, apparatus., 2. The standard electrode potentials of the Sn and Cu, electrode→s at 298K, are given as, Sn2+ + 2e- → Sn; E0 = - 0·136 V, Cu2+ +2e- →Cu; E0 = 0.34 V, Predict the reaction between these metals and I N sulphuric acid, producing H2., (ii) Construct a feasible galvanic cell by coupling the half cells, of the two metals with a salt bridge and write the Nernst equation, for the emf of the cell at 298 K., (iii) Of the substances Sn, S2+ which is the strongest?, 2+2+1=5, 2014, 1. The speeds of Na+ ions and I- ions differ widely. If a salt bridge is, made using NaI salt instead of KCl in an electrochemical cell,, assess the effectiveness of the salt bridge., 2, , 9|Page, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2. Molar conductance’s 𝜆𝜆m for 0.1M and 0.01M KCl aqueous, solutions are 129.0 ohm-1 cm2 mol-1 and 143 ohm-1 cm2 mol-1, respectively. Calculate corresponding specific conductance (𝜅𝜅), 3, and explain the trends in 𝜆𝜆m., 2015, , 1., What is the relation between degree of dissociation and, molar conductivity of electrolyte?, 1, 2., The difference between the electrode potentials of two 1, electrodes when no current is drawn through the cell is called, A) Cell potential, B) Cell emf, C) Potential difference, D) Cell Voltage, , ©Luwang Sanggai, , 3., , Cu2+ + 2e- → Cu ; Eo= +0.34V, Ag+ + e- → Ag ; Eo= +0.80V, (i), Construct a galvanic cell using the above data., (ii) For what concentration of Ag+ ions will the emf of the cell, be zero at 25°C, if the concentration of Cu2+ is 0.1M? (, log 5.058 = 0.704)., 3, 2016, , 1. Write an equation for the relation between standard free, energy change and standard cell potential., 2. Depict the galvanic cell in which the reaction, Zn(s) + 2Ag+ (aq)→ Zn2+ (aq) + 2 Ag (s) takes place., 3. Calculate /\αm for acetic acid, Given i) /\αm (HCl) = 426 (Ω-1 cm2mol-1 ), ii) /\αm (NaCl)=126 (Ω-1 cm2mol-1 ), iii) /\αm (CH3COONa) = 91 (Ω-1 cm2mol-1 ), , 10 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573, , 1, 1, 3

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2017, 1. Zinc protects iron from corrosion better than tin. Give reason., 1, 2. What are primary cells and secondary cells?, 2, 3. What is meant by Faraday constant? How much charge is, required for reduction of 1 mole of A13+ ion to Al?, 2, 2018, , ©Luwang Sanggai, , 1. (i) The resistivity of a 0.8 M solution of an electrolyte is 5 x, 10-3 ohm cm., Calculate its molar conductivity., (ii) Calculate the mass of hydrogen evolved by passing a, current of 0.5 ampere for 40 minutes through acidified water., (iii) Write the Nernst equation and calculate emf of the cell,, Mg(s)/Mg2+ (0.001M)//Cu2+ (0.000IM)/Cu(s) at 298K., Given Eo cell = 2.71 volt, 1+2+2=5, 2019, 1., , In the electrode of first kind Cl2/Cl-, the electrode material Cl2 is, a non-conductor. How can the electron transfer be carried out with, the ion (CI-)? 1, , 2., , The reduction potential of the couples A+ I A ands+ IB are 1.66V and, 0.80V respectively. Which of the, following reactions will occur when the, two systems are, combined?, 1, A) A+ + B+ → A + B, C) A + B+ → A++ B, , B) A+ + B →A + B+, D) A+ B → A++ B+, , 11 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 3., , State Kohlrausch law of independent migration of ions. How, is the law used to determine the degree of dissociation of a weak, electrolyte?, 3, , 2020, , ©Luwang Sanggai, , 1. Two faradays of electricity are passed through a solution of, CuSO4. The mass of copper deposited at the cathode (at mass of, Cu= 63.5 amu) is, 1, A. 2 g, C. 31.75 g, B. 127g, D. 63.5 g, 2. Calculate the E.M.F. of the cell,, 3, Mg(s)IMg2+(0.1M)II Ag+(1 x 10-3M)IAg(s), E0Ag+/Ag= + 0.8V, E0Mg2+/ Mg = -2.37V, What happens to the E.M.F. if the concentration of Ag+ is, decreased to 1x10- 4M? [given log 5 = 0.6990], 3., , What is meant by 'limiting molar conductivity'.?, , 1, , 12 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , CHAPTER 4 – CHEMICAL KINETICS, 2011, 1., , For the given reaction, 2A → B, the rate law is, ̶, , i), ii), , 𝑑𝑑𝑑𝑑, 𝑑𝑑𝑑𝑑, , = k[A], , Integrate the rate equation., , How would the plot of [A] against t vary?, Derive an expression for the half-life period in, terms of the reaction rate constant, k., 2+1+2=5, , ©Luwang Sanggai, , iii), , 2012, , 1. When is the rate of reaction equal to specific reaction rate?, 1, 2. In the reaction, aA + bB → products, if concentration of A is, doubled, (keeping B constant) the initial rate becomes, four times and if B is, doubled (keeping A constant), the, rate becomes double. What is the order of reaction?, 1, 3. What is meant by 'rate constant, k' of a reaction? If the, concentration be expressed in mol L-1 units and time in seconds,, what would be the units for k, i), for a zero-order reaction and, ii), for a first order reaction., 3, , 13 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2013, 1.The reaction 3ClO- → ClO-3 + 2Cl- follows the mechanism: 2, ClO- + ClO- → ClO2 + Cl- (slow step), CIO2 +ClO- → ClO3 + Cl- (fast step), (i) Write the differential rate law of the reaction., (ii) If the concentration is measured in mol L-1 and time in, minute what is the unit of the rate constant of the reaction?, 2., , The rate constant of a first order reaction is given by :, , log k = 14.34 -, , 1·25 ×10000, 𝑇𝑇, , (K). Calculate the activation energy at, , ©Luwang Sanggai, , reaction rate constant of the reaction if its half reaction time 256, minutes., (Given. R=8·314J K-1 mol-1) 3, , 2014, 1. If the unit of specific rate constant (K) for a certain reaction is, L2 mol-2 s-1, 1, (A) Zeroth order, (B) First order ·, (C) Second order, (D) Third order., 2. Define order of a reaction. Give an example where, molecularity is not equal to order., 2, 3. The half-life time (t1/2) of first order reaction is 3 minutes., Then, calculate the time taken to complete 75% of the initial, concentration., (given log 2 = 0.301), 3, , 14 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2015, , ©Luwang Sanggai, , 1. Which of the following statements is NOT correct for the, catalyst?, 1, A), It catalyses the forward and backward reaction to the, same extend., B), It alters ΔG of the reaction., C), It does not change the equilibrium constant of a, reaction., D) It provides an alternative mechanism by reducing, activation, energy between reactants and products., 2., A reaction is of second order with respect to a reactant., How is its rate affected if the concentration of the reactant is, (i) doubled (ii) reduced to half?, 2, 3., Derive an expression to calculate time required for, completion of zeroth order reaction., 2, , 2016, , 1., A plot of log(x/m) versus log p for the adsorption of a gas, on a solid gives a straight line with slope equal to, 1, A) Log K, B) - log K C) n, D) 1/n, 2., , i), ii), iii), , Define Molecularity of a reaction., Derive an integrated rate equation for rate constant for, the first order reaction., What are the units of rate constant for zero order, reaction?, 1+3+1=5, , 15 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2017, 1., , a) What is activation energy of a reaction?, b), The rate of reaction increases in presence of catalyst., Explain the statement by plotting a cure between reaction, coordinate and energy., c), For a reaction, the initial concentration of reactant is, 0.4M and rate constant is 2.5 x 10-4 molL-1 S-1. Calculate the, half-life period of the reaction. 1+3+1=5, , ©Luwang Sanggai, , 2018, 1., , What is rate law?, , 1, , 2. For the reaction 2A + B-+ 3C + D, which of the following, does NOT express the reaction rate?, 1, A), B), C), D), , −𝑑𝑑𝑑𝑑, , 2𝑑𝑑𝑑𝑑, −𝑑𝑑𝑑𝑑, 𝑑𝑑𝑑𝑑, −𝑑𝑑𝑑𝑑, , 3𝑑𝑑𝑑𝑑, −𝑑𝑑𝑑𝑑, 3𝑑𝑑𝑑𝑑, , 3., For a reaction, the rate law, is Rate, K = [X]1/2[Y]. Can this, be an elementary reaction?, 3, , 16 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2019, , 1., , The rate of a reaction is expressed as -, , −𝑑𝑑𝑑𝑑, 𝑑𝑑𝑑𝑑, , = K., , i) Obtain an expression for the concentration (C) at time (t) if the, initial concentration value is Co, ii) Calculate half-life period (t1/2) given that the reaction starts with, a concentration of 0.1 mol L·1 and rate constant 2.5 x 10-l mol L-1 S-1., iii) Give a qualitative plot of concentration against time. 2+2+1=5, , ©Luwang Sanggai, , 2020, , 1. Why molecularity is applicable only for elementary reactions and, order are applicable for elementary as well as complex, reactions?2, 2. What is the relation between rate constant and activation energy, of a reaction? Illustrate the effect of a negative catalyst on, activation energy by plotting a curve between the reaction coordinate and energy., 3, , 17 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , CHAPTER 5- SURFACE CHEMISTRY, 2011, 1., Differentiate between homogeneous and heterogeneous catalysis, with one example each. 2, 2., , (i), , For the given reaction, 2A → B, the rate law is, −, , 𝑑𝑑𝑑𝑑, , 𝑑𝑑𝑑𝑑, Integrate the rate equation., , = k[A], , (ii) How would the plot of [A] against t vary?, , ©Luwang Sanggai, , (iii) Derive an expression for the half-life period in tcm1s of the, reaction. 2+1+2=5, , 2012, 1., What is an emulsion?, Write two applications of emulsification?, 2., was, , In an adsorption experiment, a graph between log, , 2, 𝑥𝑥, , 𝑚𝑚, , versus log P, , found to be linear with a slope of.45°. The intercept on the log, , 𝑥𝑥, , 𝑚𝑚, , axis was, found to be 0·3010. Calculate the amount of the gas, absorbed per gram of charcoal under a pressure of 0.5 atmosphere. 2, 3., , Why do soaps less effective in hard water for washing clothes? 2, , 18 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2013, 1., The heat of adsorption of a gas on a solid surface is 390 kJ mol-1., Write two characteristics of such a type of adsorption., 2, 2., A silver chloride sol was prepared by treating excess of KC/ with a, limited amount of silver nitrate solution. On subjecting the prepared sol, to electrophoresis and electro-osmosis which of the following, phenomena could be observed?, 1, A) Migration of the colloidal silver chloride particles towards the cathode, B) Migration of the colloidal silver chloride particles towards the anode, C) Haphazard movement of the colloidal silver chloride particles, , ©Luwang Sanggai, , D) Increasing the level of dispersion medium in the anodic compartment, of the electro-osmosis apparatus, , 2014, 1. What are (a) Tyndal effect, (b) Brownian motion and (c) Gold, number, 3, 2. Define order of a reaction. Give an exam pie where molecularity, is not equal to order., 2, 2015, 1., , Indicate a chemical reaction involving a homogenous catalyst. 1, , 2. How does an increase in temperature affect both physical as well, as chemical adsorption?, 1, , 19 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 3. What are lyophilic and lyophobic colloids? Give one example of, each type., 2, 2016, , 1., , 3, , Account for the following observations:, , i) A delta is formed at a point where the river enters the sea., ii) Power substances are more effectives as adsorbent than their, crystalline forms., , ©Luwang Sanggai, , iii) Smoke from fire often has blue tinge., 2017, 1. Define the following giving an example of each:, a) Coagulation, b) Tyndall effect., , 2, , 2. How do the size of the particles of adsorbent and pressure of the, gas influence the extent of adsorption?, 2, , 2018, 1. Ferric hydrochloride solution is coagulated by the addition of, Na3PO4 solution. Which ion is responsible for this?, 2. The catalyst used in the hydrogenation of oil is, A) Fe, B) Ni, C) Mo D) Sn, , 20 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573, , 1, 1

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2, , 3. Giving example, define, (i) homogeneous and, (ii) heterogeneous catalysis, , 2019, , ©Luwang Sanggai, , 1. In Haber's process of ammonia synthesis, presence of traces, 1, of H2S retards the rate of the reaction. Why?, 2. Write three features which distinguish physisorption from, chemisorption., 3, , 2020, , 1. Why does physisorption decrease with rise of temperature? 1, 2. Give reasons for the following statements:, , 3, , (a)Smoke from fire often has blue tinge, (b)Gelatine is generally added to ice cream, (c)Lyophilic sols are called reversible colloids, , 21 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, CHAPTER 6- GENERAL PRINCIPLES AND PROCESS OF, ISOLATION METALS, , 2011, 1., , Why do metals not occur as nitrates in nature?, , 1, , 2. Describe the carbon reduction process for conversion of ZnO to Zn, in its metallurgy., 2, , ©Luwang Sanggai, , 2012, 1. What is meant by leaching? Give reactions involved during, leaching of alumina from bauxite ore., 3, , 2013, 1. How will you remove silica during the extraction of iron from, its oxide ore? 1, 2. Illustrate the bleaching actions of SO: and chlorine and, compare them., 3, 2014, 1., In the Blast Furnace, the reduction of Fe203 by coke (C) and, carbon monoxide (CO) takes place around 1073 K. With the help, of Ellingham diagram explain which reducing agent converts, Fe203 to Fe below and above 1073 K. 3, , 22 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2015, , 1. Name two separate methods used for refining of copper and, nickel metals?, 1, 2. The brown ring test for nitrates depends upon, 1, A), The reduction of nitrate to nitric oxide., B), Oxidation of nitric oxide to nitrogen dioxide., C), Reduction of ferrous sulphate to iron., D), Oxidation action of sulphuric acid., , ©Luwang Sanggai, , 3. What chemical principle is involved in choosing a reducing, agent for getting the metals-Aluminium and Iron from its oxide, ores and justify the choice of the reducing agent., 2, , 2016, i), ii), , How is leaching carried out in case of low-grade Cu Ore?, How is cast iron different from pig iron?, , 2017, , 1. In the metallurgy of iron from haematite, limestone is added to, act as, 1, A) Flux B) slag, , C) a reducing agent D) an oxidizing agent, , 2. Define metallurgy. Name the important metallurgical operations. 2, , 23 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573, , 3

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2018, 1. Sulphide ores are concentrated by froth floatation process only., Why?, 1, 2. Describe the principles of (i) Liquation and (ii) Cupellation used for, purification of metals., 2, , ©Luwang Sanggai, , 2019, , 1. When copper is extracted from pyrite ore, the molten copper, metal in the Bessemer converter is contaminated with basic FeO, impurity. Suggest a flux that can be used to remove the impurity, as slag. 1, 2. 2. Spelter (impure zinc) contain Pb, Fe and Cd as impurities., How can you refine impure zinc? 2, , 2020, , 1. Differentiate between 'Roasting' and 'Calcination' with one, example each., 3, , 24 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , CHAPTER 7- P- BLOCK ELEMENTS, 2011, 1., , Why do noble gases have comparatively large atomic sizes? 1, , 2., , About transition elements, write the following in brief:, , 3, , i) Metallic character., ii) Oxidation states., iii) Formation of coloured ions., 3. Write the reaction scheme for the manufacture of nitric acid by, Ostwald process. What is aqua-regia? Give a reaction in which nitric, acid reacts with a metal to produce hydrogen., 3+ 1 + l = 5, , ©Luwang Sanggai, , 2012, 1., , What is inert pair effect?, , 2., , Why is white phosphorus kept under water?, , 1, 1, , 3. All the ions of NaF and MgO have the same number of electrons, and inter molecular distances are about the same (235pm & 215pm)., Then, why are the melting point of NaF( 992 c) and MgO( 2642 c) so, different?, 1, 4. Give the principle of manufacture of sulphuric acid by contact, process., 3, 5., , Explain the following:, , i), , H3PO3 is a diprotic acid or dibasic acid., , ii), , NH3 has higher boiling point than PH3., , 3, , iii) Electron affinity of Cl is greater than that of F., , 25 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2013, 1. Identify X from the following reactions. Write the catalysed reaction,, indicating the catalyst used, in the manufacture of sulphuric acid by, Lead Chamber process., 1, 1, , 2. Br2 reacts with Na0H to produce:, (A) NaBr only in cold solution, (B) NaBr0 only in cold solution, (C) NaBr only in hot solution, (D) NaBr and VaBr03 in hot solution, , ©Luwang Sanggai, , 3. Illustrate the bleaching actions of SO: and chlorine and compare, them., 2, 4. Write the reactions involved in the manufacture of nitric acid by, Ostwald process? Give one reaction each in which nitric acid acts as, an acid and as an oxidising agent. What is the structure of nitrate ion?, 2+1+1+1=5, 2014, , 1. Describe the Haber process of ammonia (NH3) manufacture. Give, a reaction to prepare urea from ammonia., 5, , 2015, 1. Account for the following observation: 2, I), , Nitrogen is a gas but phosphorus is a solid, , II), , H1PO3 acts as a reducing agent but H3PO4 does not., , 26 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2. What are halogens and inter-halogen compounds? Discuss the, anomalous behaviour of fluorine. Write the balanced chemical, equation for the reaction of HCl with MnO2., 4+1=5, , 2016, , 1., , 1, , Identify X from the following reactions:, , Br2 + XBr- → X2 and X2 cannot oxidize other halide ions but it can, oxidize KClO3 as X2 + 2KClO3 → 2KXO3 + Cl2, , ©Luwang Sanggai, , 2. Write the principle of manufacture of sulphuric acid by contact, process., 3, 3., , a) Why neon is used in illuminating warning signal?, , b), , Give the product of the following reactions:, , i) Xe(g) + F2( g), ii) Xe(g) + PtF6, , Nickel tube, , →, , 3, , →, 2017, , 1. Ozone is an oxidizing as well as a reducing agent. Support the, statement by giving one example of each., 3, 2. Describe in brief the following:, , 5, , a) Haber's process, b) Inter-halogen process, c) Ostwald’s process, d) Inter-halogen compound, e) Anomalous behaviour of fluorine., 27 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2018, 1., , Oxygen exhibits +2 oxidation state in the compound. 1, , A) H2O, 2., , B) Na2O C) OF2 D) MgO, 2, , Account for the following observation:, I), , Nitrogen is a gas but phosphorus is a solid, , II)H1PO3 acts as a reducing agent but H3PO4 does not., 3. a) On adding cone. H2SO4 to sugar black mass is obtained. Identify, the block mass., b) What is ring test? Write the chemical reaction involved in the, ring test., , ©Luwang Sanggai, , c) Nitrogen is a gas whereas phosphorus is solid. Explain. 1+2+2=5, , 2019, , 1. Oxidation in alkaline medium using KMnO4, the oxidation number, of manganese changes from, 1, A) + 7 to + 2, 2., , B) + 2 to + 7, , C) +7 to +4, , D) +7 to +5, , On the basis of VSEPR theory deduce the geometry of XeF2. 2, , 3i) How is H2SO4 manufactured by contact process?, ii) What are inter-halogen compounds? Why are they, in general, more, reactive than the halogens?, iii) Why is N2 very inert?, 2+2+1=5, 28 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2020, , 1. Which of the following is kept under water?, 1, A. White phosphorus, B. Sodium metal, C. Sulphur, D. Red phosphorus, 2. i), Why are halogens placed in Group 17?, ii), Halogens except fluorine ·exhibit higher oxidation state., Explain why., iii), Why are boiling points of noble gases very low? How the, boiling points vary on going down the group (gr-18)? 1+2+2=5, , ©Luwang Sanggai, , CHAPTER 8 – D & F BLOCK ELEMENTS, 2011, , 1., , 1, , Complete the reaction,, , 2Mn0-4 (aq) + 4H2 (aq) → 2Mn2+ + 8H2O+...., , 2., , In the reaction, , 1, , NaCl + K2Cr2O7 + conc. H2SO4 → X + NaSO4 + H2O, , X is a reddish-brown gas which gives a yellow solution on passing, through water and a yellow precipitate on treatment the solution with, lead acetate solution. X could be, (A) Cl2, (B) CrO3, , C) H2CrO4, D) CrO2C/2, , 3., Why is La(OH)3 the most basic while Lu(OH)3 is the least in the, basic character of the hydroxides of lanthanides?, 2, , 29 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2012, 1. Describe the preparation of potassium dichromate from chromite, (FeCr2O4) ore. Write the chemical equation of the reaction involved., What is the effect of increasing pH of a solution of potassium, dichromate?, 5, 2013, 1. Write my two characteristics which can be used to recognise a, given element as a transition element., 2, , ©Luwang Sanggai, , 2. Explain, by giving one example each, how does KMnO4 oxidises, substances in:, 3, (i) neutral medium,, (ii) acidic medium and, (iii) alkaline medium, , 2014, 1., What is lanthanide contraction? What causes it? What are, important consequences of lanthanide contraction?, 1+1+3=5, , 2015, , 1., Describe the preparation of potassium dichromate from chromite, ore. What is the effect of increasing pH of a solution of potassium, dichromate?, 4+1=5, 30 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2016, , 1., , a) Explain the following statements giving reasons :, i) Transition metals are known to form many interstitial, compounds., ii), Transition metals exhibit variable oxidation states., iii), The enthalpies of atomization of transition metals· are, high., b) Why transition metals generally form coloured, compounds?, 1x3+2=5, , ©Luwang Sanggai, , 2017, 1. a) Describe the preparation of potassium dichromate from, chromite ore., b) How does the acidified solution of potassium permanganate, react with, i) oxalic acid ii) Iron (II) ion, 3+2=5, , 2018, , 1. Define transition elements Zinc, Cadmium and Mercury belong to, d-block of the periodic table. But they are not considered as transition, element. Why?, 2, 2., Write the step-wise process for the preparation ofK2Cn01 from, chromite ore. 3, , 31 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2019, , 1., 2., , What is the most common oxidation state of the Actinoids?, , 1, , ©Luwang Sanggai, , 2020, 1. The colour of which of the following compounds is NOT due to dd transition., C. Cr2(SO4)3, A. CoCl2, B. KMnO4, D. NiSO4, 2. Write the stepwise process for the preparation of potassium, dichromate from chromite ore., 3, 3. An aqueous solution of gas 'A' gave the following reactions. 2, (i)It decolourised an acidified KMnO4 solution., (ii) On boiling with H2O2 followed by cooling and then adding, an aqueous solution of BaCl2, a white precipitate insoluble in dil., HCI was obtained. Identify the gas 'A' and give the equation for, step (ii)., 4. Copper (I) has d18 configuration while copper (II) has d9, configuration, still copper (II) is more stable in aqueous solution, than copper (I). Assign reason., 1, , 32 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2014, 1, 1. Give the enantiomers of [CoBr2(en)2]+ ., 2. The magnetic moments (µ) of octahedral K4[Mn(Cl)6] and tetrahedral, K[MnCl] arc 2.2 B.M. and 5.9 B.M. respectively. Explain the different, values of magnetic moments for the same Mn2+ (at. No =25) use crystal, Field Theory]., 2, 3. Decide (a) type of hybridisation and (b) corresponding geometrical, shape of XeF2 by-applying VBT (Valence Bond Theory). 2, , ©Luwang Sanggai, , 2015, 1., Write IUPAC name of the coordination compound,, [COCl2(en2)]SO4., , 1, , 2., Draw all the possible isomers of the coordination compound, having the composition CrBr2Cl(NH3)4., , 2, , 2016, , 1., , Give the IUPAC name of the complex compound,, K3[Co(CN)5(NO)], 3. Predict the number of unpaired electrons in the square planar, 2, [Pt(CN)4)2- ion., , 34 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573, , 1

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2017, , 1., Write the postulates of Werner's theory of coordination, compounds., , 3, , 2018, 1., , Write the IUPAC name of the coordination compound, , ©Luwang Sanggai, , 2. Using the V.B.T. predict the shape and magnetic character of, [Ni(CO4))., , 1, 2, , 2019, , 1. Tetrahedral heteroleptic complex cannot exhibit geometrical, isomerism but may show optical isomerism. Explain with example. 3, , 2020, 1. Which of the following is the IUPAC name of [Pt(NH3 )2Cl(NO2)] 1, A.Platinum diammine chloronitrite, B. Chloronitrito-N-ammine platinum-II, C. DiamminechJorido nitrito-N-platinum-II, D. Diammine chloronitrito-N-platinate., 2. What is spectrochemical series? Explain the difference between a, weak field ligand and a strong field ligand., 2, , 35 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , Give a brief account of the following with one example of each. 3, , 2., i), , Markovnikov's rule ***, , ii), , Kharasch effect***, , iii), , Saytzeff rule, , [***out of syllabus], , ©Luwang Sanggai, , 2016, , 1. Predict the major product that would be formed by, dehydrohalogenation of, 2-Chloro-2-methyl butane with, potassium hydroxide in presence of ethanol., 1, 2., , State the following reactions giving an equation for each:, , i) Sandmeyer's reaction, 3., , ii), , Coupling reaction., , a) Complete the following reactions:, i) CH3Cl + KOH, ii), b), , 2, , CH3Cl, , provide the relevant mechanism., , 38 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573, , 3

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, b) Chlorobenzene to phenol., 2, , 2. What are absolute alcohol and methylated spirit?, , 2013, , 1. Give a reaction which distinguishes ethanol from methanol. 1, 3, , 2. About the phenol write, (i) one general method of preparation, (ii) one chemical property which shows the acidic nature and, , ©Luwang Sanggai, , (iii) one electrophilic substitution reaction, , 2014, 1, , 1. Why is phenol acidic?, , 2. Give a chemical method to distinguish amongst primary, secondary, and tertiary alcohols. Give one reaction each to illustrate the validity of, your answer., 3, , 2015, 1.Rectified spirit cannot be converted into absolute alcohol by simple, distillation. Give reason., 1, 2. Describe the following:, i) Kolbe's reaction, , 3, , ii) Williamson's synthesis, , iii) Coupling reaction., , 41 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 3. What is esterification reaction? Discuss the mechanism of, esterification. Give a suitable example of H. V. reaction. 1+3+1=5, , 2016, 1. a) Describe the preparation of ethanol from, i) ethanal ii) ethanoyl chloride iii) ethanoic acid, , b), , Write one test each to differentiate, i) acetaldehyde from acetone and, 3+2=5, , ©Luwang Sanggai, , ii) ethanol from methanol, , 2017, 1., 2., , Write mechanism of acid dehydration of ethanol to yield ethene.2, Give two reactions that show that acidic nature of phenol., 2, , 2018, , 1. Salicylaldehyde is a product obtained by the action of CHCl3 on, C6H5OH in presence of aq. KOH. What is the name of the reaction?2, 2. Why is C2H5OH miscible with water?, , 1, , 42 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 3. Draw the resonating structures of phenol and predict whether OH, group is meta directing or otho and para directing towards electrophilic, ring substitution reactions., 3, , 2019, , 1.How will you synthesize the isomeric ether of benzyl alcohol by, Williamson synthesis?, 1, , ©Luwang Sanggai, , 2. Describe Reimer-Tiemann reaction with an example. What will be the, acidity of the product as compare to the substrate?, 3, , 2020, , 1., , i) An organic compound 'A' having molecular formula C6H60, gives a characteristic colour with FeCl3 solution. When 'A' is treated, with CO2 and NaOH at 400 K under pressure, compound 'B' is, obtained. The compound 'B' upon acidification gives compound 'C', which reacts with acetylchoride to form 'D' which is a popular pain, killer. Deduce the structures of A, B, C and D., ii)Predict the products of the following reaction, 4+1=5, , 2. A solution of bromine is methanol or ethanol cannot be used for the, detection of unsaturation in organic compounds. Why? 1, 3. Give the equations for the preparation of 1-lodobutane from, (i), (ii), , 1 -butanol and, 1 - chlorobutane, , 2, , 43 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , CHAPTER 12- ALDEHYDES, KETONES AND CARBOXLIC, ACID, 2011, 1. What is alpha-hydrogen in a carbonyl compound? Outline, with, relevant chemical equations wherever possible, the similarities and, differences on the reactivity or the compounds CH3CHO and, C6H5CHO with the following reagents., (i) Tollens’s reagent, (ii) NaOH, 1+2+2 = 5, , 2012, , ©Luwang Sanggai, , 1. Identify the end product A and B in the following reaction. (Give, IUPAC name)., 2, K2Cr2O7, , SOCl2, , CH3CHO, A, B, H+, 2.Why acetaldehyde gives aldol condensation while formaldehyde does, not? Explain., 2, 3. Describe simple chemical tests to distinguish between 3, i) propanal and propanone., ii) benzoic acid and phenol., , 2013, 1. Discuss the mechanism of nucleophilic addition reaction of carbonyl, compounds. Illustrate it by taking the addition of C2H5MgBr to ethanal, as the example. If the addition product is hydrolysed, which products, could be formed? Why are ketones less reactive towards nucleophiles, than aldehydes?, 3+1+1=5, , 44 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2014, 1. What is Cannizzaro's reaction?, , 1, , 2. Write the IUPAC name of, , 1, , HOOC-CH2 –CH(COOH)-CH2 -COOH, 3. An organic compound P(C2H4O) reduces Tollen's reagent. On, oxidation of P with acidified K2Cr2O7; the compound A is formed which, on treatment with calcium hydroxide forms a compound B. Dry, 4istitlation of B produce C which on warning with dilute NaOH gives D., Heating P with an acid produce E. What are A, B, C, D and E and give, the reaction sequences., 5, , ©Luwang Sanggai, , 2015, 1. CH3CHO and C6H5CH2CHO can be distinguished chemically by, A) Benedict's test, B) Iodoform test, 1, C) Tollens test, D) Fehling's test., 2. What is esterification reaction? Discuss the mechanism of, esterification reaction. Give a suitable example of H. V. Z reaction., 1+3+1=5, , 2016, 1 Show how benzaldehyde can be converted into benzophenone? 1, 2 A compound A(C4H10O) is found to be soluble in concentrated, sulphuric acid A does not react with sodium metal or potassium, permanganate when (A) is heated with excess of HI, it gives a, single alkyl halide. Deduce the structure of compound (A) and, explain all the reactions involved., 3, , 45 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2017, 1 What is a haloform reaction?, 2 How is acetophenone converted to benzoic acid?, , 1, 1, , 3.How are aldehydes distinguished from ketones using Tollen's and, Fehling's reagents?, 3, , 2018, , ©Luwang Sanggai, , 1. a) Describe the following reactions., 3+2=5, i) H.V. Z reaction ii) Cannizzaro reaction iii) Rosenmund's reaction, b) An organic compound C2H4O gives red precipitate when warmed, with Fehling's solution. Give the IUPAC name of the compound and, write the chemical equation for the reaction., , 2019, 1.i) An organic compound 'A'(molecular formula C6H10O) forms, hydrazone and reduces Tollen,s reagent. When treated with CH3MgBr, followed by hydrolysis.'A' gives a chiral compound 'B'. Compound 'B' on, oxidation with potassiumdichromate/acid gives compound 'C'., Compound 'C' undergoes haloform reaction and gives cyclopentane, carboxylic acid as oxidation product. Identify A, B, C and write the, sequence, of, the, reactions., ii) Write the mechanism of esterification reaction of benzoid acid with, ethanol in the presence of concentrated sulphuric acid. 3+2=5, , 46 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2020, 1. What is Aldol condensation? Describe it with suitable e ample each, for the formation of aldol and ketol., 3, , CHAPTER 13-AMINES, , ©Luwang Sanggai, , 2011, 1. (i) Why methylamine is soluble in water but not aniline?, (ii), Why, are, tertiary, amines, not, activated?, (tii) How can you separate a mixture of primary and secondary, amine?3, , 2012, , 1. Why is ethylamine more basic than aniline? Explain., , 3, , 2013, , 1. What happens when ethanamide is treated Br2 and KOH? What, the name of the reaction?, 2, 47 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2. How is nitrobenzene converted into benzene diazonium chloride?1, 3. Give the chemical equations for each of the following reactions:2, a. Hoffman bromamide reaction, b. Carbylamine reaction., , 2018, 1. Write the structure of A, B and C in the following: 3, CH3Cl, , KCN, , A, , LiAlH4, , B, , CH3CHO, , C, , ©Luwang Sanggai, , 2019, , 1., , i) Coupling reaction of benzene chloride with phenol is carried out, in basic condition, but the same basic condition cannot be used in, the coupling reaction with aniline. Explain. 2, , 2020, , 1. Explain the following, 2, (i), Diazonium salts of aromatic amines arc more stable than, those of aliphatic arenes., (ii) Amines are less acidic than alcohols of comparable, molecular masses., , 49 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, 2. A saturated mon<;>amine liberates nitrogen gas on reaction with, nitrous acid in cold condition. On heating with methyl iodide, it forms, quaternary ammonium iodide (mol. mass = 215). Deduce the, formula of the amine. (Given at. mass of iodine = 127). 2, , CHAPTER 14 - BIOMOLECULES, , ©Luwang Sanggai, , 2011, 1. How are carbohydrates stored in the animal body? 1, 2. What are vitamins? Which vitamin deficiency cause night, blindness?, 2, 3. Illustrate the formation of peptide bond by taking a suitable, example., 2, , 2012, 1. Which of the following exists as zwitterion?, 1, A. p-aminophenol, C. Sulphanilic acid, B. Salicylic acid, D. p-aminoacetophenone., 2. What is the difference between a-D-glucose and p-D-glucose? 1, 3. Name two water soluble vitamins, their sources and diseases caused, by their deficiency in diet., 2, , 50 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2013, 1. Which of the following is the main structural feature of proteins?1, (A) -0(C) O=C-A, (B) - -0(D) All of these, 2. What are carbohydrates? Which carbohydrates are the sugars and, which are the non-sugars? Among the sugars which are the, reducing and which are the non-reducing?, 3, , ©Luwang Sanggai, , 2014, 1. Maltose is a disaccharide having two mono saccharides link, together by glycosidic bond, 1, A) Alpha D glucose and Beta D fructose, B) Beta D glucose and alpha D fructose, C) Alpha D glucose and alpha D fructose, 1. Beta D glucose and alpha Fructose, 2. Predict the base sequence of mRNA synthesised from a DNAstrand with base sequence TAGCGAGGCCA., 1, 3. What is "Inversion of sugar"?, 2, , 2015, 1. Define coenzymes. Give one example. Mention two points of, difference between vitamins and hormones. 3, , 51 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2016, , 1. Which type of linkage is responsible for secondary structure of, protein?, 1, 2. Which of the following statements is not true about glucose? 1, A) It is an aldohexose n-hexane C) It is present in furanose form, B) On heating with HI ii fom1s D) It does not give 2,4-DNP test, 2. Differentiate between DNA and RNA with respect to, , 2, , (a) Sugar and (b) base residue., , ©Luwang Sanggai, , 2017, 1. Represent sucrose and n-D-maltose iI1 the form of Haworth, structures., 3, , 2018, 1. If one strand of a DNA has the sequence of bases, TATCTACCTGGA. Write the sequence of base on the, complementary strand., 1, 2. What happen when D-glucose is heated with red phosphorus and, HI?, 1, 3. When an egg is boiled, what happens to the soluble globular protein, present in it?, 1, , 52 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2019, , 1. Write the Fischer structure of (R)-2-Bromubutane., 1, 2. A protein has the amino acid sequence xxxxxxx as a part of, polypeptide chain. In the alpha-Helix structure, the-NH2 of which, amino acid will form H-bond with the CO group of Alanine? What will, happen to this hydrogen bond when the protein is denatured? 2, , 2020, , ©Luwang Sanggai, , 1. Name a sugar formed when a nucleotide from DNA containing, thymine is hydrolysed., 1, 2. Assigned D and L configuration of alpha amino acids, COOH, H2N C H, , COOH, H, , R, , C NH2, R, , b) On electrolysis in acidic medium amino acids migrate towards the, cathode while in alkaline towards anode. Explain. 1+2=3, , CHAPTER 15 - POLYMERS, 2011, 1. What is a biodegradable polymer? Why do we need such, polymers?, 2, 53 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2012, 1. Which of the following is a biodegradable polymer?, A) Cellulose, C) PVC, B)Polythene, D) Nylon-6, 2. Give the preparation of Buna-S and its one uses., , 1, 2, , 2013, , ©Luwang Sanggai, , 1. Write the reaction for synthesis of a condensation polymer., 2. What are biodegradable polymers? Write a method which converts, non-biodegradable polymers into biodegradable ones?, 2, , 2014, 1. Name a biodegradable polymer., 1, 2. What are the monomers of natural and synthetic rubbers? 2, , 2015, 1. Define the terms, a) Elastomers b) Fibre, , c) Thermoplastic, , 3, , 2016, 1. Define the term plasticizer., 2. How is nylon-66 synthesis? What type of polymer is it?, , 54 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573, , 1, 2

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2017, 1. How is Bakelite made and what is its major use? Why is it, thermosetting polymer?, 3, , 2018, 1. Explain with example the classification of polymer based upon, structure., 3, , ©Luwang Sanggai, , 2019, 1. Identify the monomer of the chain, (CH2-CH-CH2-CH) n, CH3, CH3, 2. What is vulcanisation? How does it improve the quality of rubber?2, , 2020, 1. Why is Bakelite a thermosetting polymer?, 1, 2. Name the polymer used in making non sticking utensil and describe, the preparation of it., 2, , 55 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , CHAPTER 16 – CHEMISTRY IN EVERYDAY LIFE, 2011, , 1. What are disinfectants? Give one example of a commonly used, disinfectant., 2, , 2012, , ©Luwang Sanggai, , 1. When does a drug cause side effect?, , 1, , 2013, 1. Write the characteristics of a good analgesic., 1, 2. HOW do antioxidants act as food preservative? Name two such, preservatives., 2, , 2014, , 1. Explain why we should not administer Aspirin or Paracetamol in, empty stomach?, 1, 2. Give the approximate general composition of a detergent?, 2, , 56 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2015, , 2016, 1. Bithionol is added to soap. Explain., 2. What are analgesics? Give one example., , 1, 2, , ©Luwang Sanggai, , 2017, 1. How does aspirin act as analgesic?, 2. Define the following with examples, a) Antipyretics, b) Antibiotics, , 1, 2, , 2018, , 1. Give one important use for each of the following, a. Equanil, b. Morphine, , 2, , 57 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573

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Luwang Sanggai’S, Chemistry Chapter wise Previous Year Questions, , 2019, 1. Compare narcotic and non-narcotic analgesics in terms of, effectiveness and side effects., 3, , 2020, , ©Luwang Sanggai, , 1. Why is he use of aspartame limited to old drinks and foods? 1, 2. How are antiseptic differ from disinfectants? Is chlorine in low, concentration antibiotic or disinfectant?, 2, , 58 | P a g e, ©Luwang Sanggai, For more notes WhatsApp us on 8132827573