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SELECTED QUESTIONS FROM, , MHT-CET 2019, , @) Surface Chemistry, , , , @) Some Basic Concepts of Chemistry, , 1. The volume of 1 mole of any pure gas at standard, temperature and pressure is always equal to, (a) 0.022414 m (b) 22.414 m?, (c) 2.2414 m? (d) 0.22414 m?, , 2. How many gram of sodium (atomic mass 23 u) is, required to prepare one mole of ethane from methyl, chloride by Wurtz reaction?, , (a) 2 (b) 23 (c) 115 (d) 46, , 3. What is the atomicity of aluminium phosphate?, (a) 8 (b) 6 (c) 5 (d) 13, , 4. Which of the following sets of components form, homogeneous mixture?, , (a) Phenol + Water (b) Sugar + Benzene, , (c)_ Silver chloride + Water (d) Ethyl alcohol + Water, 5. Whats the percentage of carbon in urea?, , (At. mass: C = 12, H = 1,N= 14,0 = 16), , (a) 20% (b) 26.6%, , (c) 6.67% (d) 46.0%, , @) States of Matter (Gases and Liquids), , 6. Whatis the density of water vapour at boiling point of, , water?, (a) 1x10 gem? (b) 1gcm?, () 6x10 gem? (d) 4x10%g cm?, , 7. Acold drink bottle contains 200 mL liquid in which i, CO, is 0.1 molar. Considering CO, as an ideal gas, ©, , the volume of the dissolved CO) at S.T-P. is, (a) 224L (b) 0.224L, (c) 2.24L (d) 0.448L, , @) Redox Reactions, , 8. The oxidation number of sulphur in Sg molecule is, , a) 6 (b) 0 (c) 2 (d) 3, , 9. Inthe reaction, i, MnOjlaq) + Briaqy—? MnOr) + BrO3{aq) the correct!, change in oxidation number of the species involved:, is 7, (a) Br to Br? (b) Mn‘? to Mn*?, (c) Mn‘? to Mn*? (d) Br! to Br*®, , | 10. In the reaction, H202(aq), , ll., , 12., , , , : 1, EP > H20y + 5 OW, , iodide ion acts as, , (a) homogeneous catalyst, , (b) acid catalyst, , (c) heterogeneous catalyst, , (d) enzyme catalyst. /, The enzyme which converts maltose to glucose is, (a) maltase (b) insulin, , (c) lysine (d) zymase., , For the conversion of oxygen to ozone in the, atmosphere, nitric oxide in gaseous phase acts as, (a) enzyme catalyst (b) inhibitor, , (©) homogeneous catalyst, , (d) heterogeneous catalyst., , G) Nature of Chemical Bond, , 13., , 14., , In ozone molecule, the formal charge on the central, oxygen atom is, , (a) -1 (b) +2 (c) 0 (d) +1, Which of following bonds has maximum bond, length?, , (a) C—O (b), (c) C—-C (d), , C—H, C—N, , ©) Hydrogen, , 15., , , 16., , i 7., , The bond angle H - O - O in H,O) in gaseous phase is, (a) 90.2? (b) 111.5° (c) 101.9° (d) 94.8°, , s-Block Elements (Alkali and Alkaline, Earth Metals), , Which of the following elements does not form amide, when reacted with ammonia?, (a) Li (b) Na () K (d) Rb, , Which among the following sets of compounds is, used as raw materials for the preparation of sodium, carbonate by Solvay process?, , (a) NaOH, HCl, CO,, , (b) NH,Cl, H,0, NaCl, , (c) NaCl, NH3, Ca(OH),, , (d) NaCl, CaCO3, H2S0,
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37. The conductivity of an electrolytic solution decreases, , on dilution due to, , (a) decrease in number of ions per unit volume, (b) increase in ionic mobility of ions, , (c) increase in percentage ionisation, , (d) increase in number of ions per unit volume., , 38, Two electrolytic cells are connected in series, , containing CuSO, solution and molten AICI, If in /, electrolysis 0.4 moles of 'Cu' are deposited on cathode :, of first cell, the number of moles of 'AI' deposited on, , cathode of the second cell is, , (a) 0.6 moles (b) 0.27 moles, (c) 0.18 moles (d) 0.4 moles., , ® Chemical Kinetics, , 39. The activation energy of a reaction is zero. Its rate, , constant at 280 K is 1.6 x 10° s“, the rate constant at, 300 Kis, , (a) 3.2x 107s) (b) zero, , (c) 1.6x 107657 (@) 16x10%s57, , 40. Fora chemical reaction, rate law is, rate = k{A}?[B]. If, [A] is doubled at constant [B], the rate of reaction, (a) increases by a factor of 8, (b) increases by a factor of 4, (c)_ increases by a factor of 3, (d) increases by a factor of 2., , 41. Forthe elementary reaction, 280219) + Or > 2803), i, 52., , identify the correct relation among the following., MSO rxg)]__ AOgy], , ©) dt dt, , (b) 41 MSOs] _ , M02], 2 dt dt, A[SO3g)] TOx,)], , Oy og, ASOxg)] Oxy], , dd) 4—— 20g)" _ _ tg)”, , (d) + 7 ai, , General Principles and Processes of, Isolation of Elements, 42, Limestone ‘is used as a flux in the extraction of, (a) iron (b) aluminium, (c) zine (d) copper., 43. Which of the following metals occurs in native state?, (a) Magnesium (b) Platinum, (c) Potassium (d) Sodium, , 44. Which of following methods is used to separate, i 56., , wolframite and stannic oxide present in cassiterite?, (a) Hydraulic washing using Wilfley table, , (b) Froth floatation, , (c) Hydraulic classifier, , (d) Magnetic separation, , , , , , , , 4!, , 49., , 50., , (Z) p-Block Elements, 5., , Which of the following is also called as nitrogen, , joxide?, (NO, (b) N203 (¢) N20, (d) N205, Which among the following does not form polyhalide, - Chlorine (b) Bromine, © Jodine (d) Fluorine, ‘The oxidation state of sulphur in H,S20; is, (a) +4 (b) +6 (c) +5 (d) +7, , In which of the oxidation state, group 15 elements act, is base?, , oe (bt) +4 (©) -3 (d) +3, , Which of the following elements does not react with, , hot concentrated sulphuric acid?, , (a) Sb (b) N (c) P (d) As, , What is the H-S-H-bond angle in H2S?, , (a) 104.5° (b) 92.1° (c) 91° (d) 90°, , (8) d- and f-Block Elements, , |S., , i 53., , , , , i 55., , When a mixture of manganese dioxide, potassium, hydroxide and potassium chlorate is fused, the, product obtained are, , (a) K,SO,, , (c) K,MnO,, , The ionic charges of man;, ion are respectively, , (a) -2,-2 (b) -1,-2 (©) -2,-1 (d) -1,-1, The ionic charges on chromate ion and dichromate, ion respectively are, , (a) -2,-2 (b) -3,-2 (©) -2,-4 (d) -4,-2, , (b) K,Mno,, (a) KMno,, , ganate and permanganate, , Coordination Compounds, , 54,, , According to Werner's theory, th,, complex is determined by TADS Beometry of the, , (a) only from the prim: i, ‘ary valence in spa,, (b) number and Position of the primary ilencies, , in space, (c) number and Ositi, , a Position of the Secondary valencies, (d)_ only from the po; iti, , we Position of Secondary valence in, aon among the following isa neutral complex?, a) [Fe(H,0),]C1, (b) “INiQNH,), ic,, (0) (PUNE :CL] —@)Klagene?, Which complex among the followin,, , (a) [Pt(NH3) 4Br2]Cl,, , (b) [Cc, 2]Br>
