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51., , Ans., , 52., , Ans., , 53., , Ans., , 54., , Ans., , FINAL NEET(UG)-2021 EXAMINATION, (Held On Sunday 12 SEPTEMBER, 2021), , CHEMISTRY TEST PAPER WITH ANSWER, SECTION-A (CHEMISTRY) 55. The molar conductance of NaCl, HCl and, , Given below are two statements:, Statement I :, Aspirin and Paracetamol belong to the class of, narcotic analgesics., Statement II :, Morphine and Heroin are non-narcotic, analgesics. In the light of the above statements,, choose the correct answer from the options, given below., (1) Both Statement I and Statement Il are true., (2) Both Statement | and Statement II are false., (3) Statement I is correct but Statement II is false., (4) Statement I is incorrect but Statement Il is true., (2), The correct structure of 2,6-Dimethyl-dec-4-ene, is:, Lo CO, (1) (2), Zz, LO KO, (3) (4), (1), BF3 is planar and electron deficient compound., Hybridization and number of electrons around, the central atom, respectively are:, (1) sp? and 4 (2) sp? and 6, (3) sp? and 6 (4) sp? and 8, (3), Noble gases are named because of their inertness, towards reactivity. Identify an incorrect, statement about them., (1) Noble gases are sparingly soluble in water., (2) Noble gases have very high melting and boiling, points., (3) Noble gases have weak dispersion forces., , (4) Noble gases have large positive values of, electron gain enthalpy., , (2), , , , Ans., , 56., , Ans., , 57., , Ans., , 58., , Ans., , 59., , Ans., , 60., , Ans., , CH3COONa at infinite dilution are, 126.45,426.16 and 91.0 S cm? mol, respectively. The molar conductance of, CH3COOH at infinite dilution is., , Choose the right option for your answer., , (1) 201.28 S cm? mol, , (2) 390.71 S cm? mol"!, , (3) 698.28 S cm? mol, , (4) 540.48 S cm? mol!, , (2), , The right option for the statement "Tyndall effect, is exhibited by”, is :, (1) NaCl solution, (3) Starch solution, (3), , The RBC deficiency is deficiency disease of:, (1) Vitamin By (2) Vitamin Bg, , (3) Vitamin B, (4) Vitamin Bo, , (1), , Dihedral angle of least stable conformer of, ethane is :, , (2) Glucose solution, (4) Urea solution, , (1) 120° (2) 180°, (3) 60° (4) 0°, (4), , The incorrect statement among the following is :, , (1) Actinoid contraction is greater for element, to element than Lanthanoid contraction., , (2) Most of the trivalent Lanthanoid ions are, colorless in the solid state., , (3) Lanthanoids are good conductors of heat and, electricity., , (4) Actinoids are highly reactive metals,, especially when finely divided., , (2), , The product formed in, , dehydrohalogenation reaction of 2-Bromo, , pentane is Pent-2-ene. This product formation, , is based on ?, , (1) Saytzeff's Rule, , (3) Hoffmann Rule, , (1), , major, , (2) Hund's Rule, (4) Huckel's Rule, , Scanned with CamScanner

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61. Which one among the following is the correct, option for right relationship between Cp and Cy, for one mole of ideal gas ?, , (1) Cp+Cy=R (2) Cp-Cy=R, (3) Cp = RCy (4) Cy=RCp, Ans. (2), , 62. Which one of the following polymers is prepared, by addition polymerisation ?, (1) Teflon, (2) Nylon-66, (3) Novolac, (4) Dacron, , Ans. (1), , 63. What is the IUPAC name of the organic, compound formed in the following chemical, reaction ?, , (i) CJH.MgBr, dry Ether, (ii) HO, H*, , Product, , Acetone, , (1) 2-methyl propan-2-ol, (2) pentan-2-ol, (3) pentan-3-ol, (4) 2-methyl butan-2-ol, Ans. (4), 64. Match List - I with List - Il., , List-I, , l(a) PCls, (b) SFe, , , , , , , , , (i) Square pyramidal, , , , (ii) Trigonal planar, (iii) Octahedral, (iv) Trigonal bipyramidal, , , , , , , , , , , , Choose the correct answer from the options, given below., , (1) (a)-{iv), (6)-(iii), (c)-(i), (d)-(ii), , (2) (a)-(ii), (b)-(iii), (c)-{iv), (d)-(i), , (3) (a)-(iii), (b)-(i), (c)-Civ), (d)-(ii), , (4) (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i), , Ans. (1), , 65. Which one of the following methods can be used, to obtain highly pure metal which is liquid at room, temperature ?, , (1) Electrolysis, , (2) Chromatography, , (3) Distillation, , (4) Zone refining, Ans. (3), , 2, , , , , , 66. The major product of the following chemical, reaction is:, , CH, *SCH-CH=CH,+HBr (C,H,CO),O, 4, , 3, , CH, (1) py oCteCHs-CH,-Br, , 3, , CH,, , cpp CHE CHe-CH;-0-COCH,, , (2), , CH, *">CH-CH-CH,, (3) CH; t, Tr, , CH, 4) 6 **>CBr-CH,-CH,, , 3, Ans. (1), 67. Tritium, a radioactive isotope of hydrogen, emits, which of the following particles ?, (1) Beta(p-), (2) Alpha (a), (3) Gamma (y), (4) Neutron (n), Ans. (1), 68. The corect sequence of bond enthalpy of 'C-X' bond is, (1) CH3-F < CH3-Cl < CH3-Br < CH3-1, (2) CH3-F > CH3-Cl > CH3-Br > CH3-1, (3) CH3-F < CH3-Cl > CH3-Br > CH3-I, (4) CH3-Cl > CH3-F > CH3-Br > CH3-I, Ans. (2), 69. Right option for the number of tetrahedral and, , octahedral voids in hexagonal primitive unit cell, are:, (1) 8, 4, (2) 6, 12, (3) 2, 1, (4) 12,6, Ans. (4), 70. Which of the following reactions is the metal, displacement reaction ? Choose the right option., , (1) 2KCIO3;_4_, 2KCI + 302, , (2) Cry03 + 2A] _A > Al,03 + 2Cr, , (3) Fe + 2HCl + FeCly + Het, (4) 2Pb(NO3)2 —» 2PbO + 4NO2 + OoT, Ans. (2)

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71., , Ans., 72., , Ans., 73., , Ans. (4), , Choose the correct option for graphical representation, , of Boyle's law, which shows a graph of pressure vs., , volume of a gas at different temperatures:, , \ oe, £00 R, , Volume (V) —>, , —>, , Pressure (P), (bar), , (1), , , , (dm’), el |, 2 = [200 K, 400 K, 600 K), rs, 2, a, (2), Volume (V) —>, (dm’), t &, = S, ro wAS oy, a8 S, 2, a, (3), Volume (V) —>, (dm’), «'l, Pc, gs 600, 2 405, (a) * 200%, Volume (V) —>, (dm’), (4), , The pK, of dimethylamine and pK, of acetic acid, are 3.27 and 4.77 respectively at T (K). The, correct option for the pH of dimethylammonium, acetate solution is:, , (1) 8.50, , (2) 5.50, , (3) 7.75, , (4) 6.25, , (3), , Among the following alkaline earth metal halides,, one which is covalent and soluble in organic |, , solvents is:, , (1) Calcium chloride, , (2) Strontium chloride, (3) Magnesium chloride, (4) Beryllium chloride, , , , 74., , Ans., , 75., , Ans., , 76., , Ans., , 77., , Ans., , The maximum temperature that can be achieved, , in blast furnace is :, , (1) upto 1200 K, , (2) upto 2200 K, , (3) upto 1900 K, , (4) upto 5000 K, , (2), , Ethylene diaminetetraacetate (EDTA) ion is :, , (1) Hexadentate ligand with four "O" and two "N", donor atoms, , (2) Unidentate ligand, , (3) Bidentate ligand with two "N" donor atoms, , (4) Tridentate ligand with three "N" donor atoms, , (1), , The following solutions were prepared by, , dissolving 10 g of glucose (CgH}20¢) in 250 ml, , of water (P;), 10 g of urea (CH4No20) in 250 ml, , of water (Pz) and 10 g of sucrose (Cy}2H220)}), , in 250 ml of water (P3). The right option for the, , decreasing order of osmotic pressure of these, , solutions is :, , (1) Po > Py > Ps, , (2) P} > Po > Ps, , (3) 1) i P3 > Py, , (4) P3 > P; > Po, , (1), , Statement I :, , Acid strength increases in the order given as, , HF << HCl << HBr << HI., , Statement II :, , As the size of the elements F, Cl, Br, I increases, down the group, the bond strength of HF, HCl,, HBr and HI decreases and so the acid strength, , increases., In the light of the above statements, choose the, , correct answer from the options given below., (1) Both Statement I and Statement II are, , true., (2) Both Statement I and Statement II are, , false., , (3) Statement I is correct but Statement II is, false., , (4) Statement I is incorrect but Statement II, is true., , (1), , —___SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS SSS 3, , Scanned with CamSeanner

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78. The structures of beryllium chloride in solid state, and vapour phase, are:, , (1) Chain and dimer, respectively, , (2) Linear in both, , (3) Dimer and Linear, respectively, , (4) Chain in both, , (1), , For a reaction A > B, enthalpy of reaction is, -4.2 kJ mol! and enthalpy of activation is, 9.6 kJ mol“!. The correct potential energy profile, for the reaction is shown in option., , Ans., 79., , {, , PE B, (1) x, , Reaction Progress, , t, , PE] A, (2) B, , Reaction Progress, , ., , (3) PFI X 3, , Reaction Progress, , t B, , A, (4) FE, , Reaction Progress, (2), Zr (Z =40) and Hf (Z =72) have similar atomic, and ionic radii because of :, (1) belonging to same group, (2) diagonal relationship, (3) lanthanoid contraction, (4) having similar chemical properties, Ans. (3), , Ans., 80., , , , 81. A particular station of All India Radio, New Delhi,, broadcasts on a frequency of 1,368 kHz, (kilohertz). The wavelength of the electromagnetic, radiation emitted by the transmitter is :, , [speed of light c = 3.0 x 108 ms™], , (1) 219.3 m (2) 219.2 m, , (3) 2192 m (4) 21.92 cm, | Ans. (1), , 82. An organic comopound contains 78% (by wt.), carbon and remaining percentage of hydrogen., The right option for the empirical formula of this, compound is [Atomic wt. of C is 12, H is 1], (1) CH (2) CHe, (3) CH3 (4) CHg, , Ans. (3), , 83. The compound which shows metamerism is :, (1) CsHi2 (2) C3HgO, (3) C3HeO (4) C4H190, , Ans. (4), , 84. Identify the compound that will react with, Hinsberg's reagent to give a solid which dissolves, in alkali :, , CH,, cH No,, , CH, H,, (2) cH% \eg”, , CH,, (3) cH” NW,, , CH, CH,, , cue NZ cu,, (4), CH,, , Ans. (3), , 85. The correct option for the number of body, centred unit cells in all 14 types of Bravais lattice, unit cells is :, , (1) 7 (2) 5, (3) 2 (4) 3, Ans. (4)

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86., , Ans., , 87., , Ans., , 88., , Ans., , 89., , Ans., , 90., , SECTION-B, Match List-I with List-ll, List-I, | FFe(CN)cl, , , , List-II, | 5.92 BM, , , , (a) (i), , (ii), , , , (b) | [Fe(H,0),]** 0BM, , , , (c) 4.90 BM, , (d), , Choose the correct answer from the options, given below, , (1) (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii), , (2) (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i), , (3) (a)-(i), (b)-(iii), (c)-fiv), (d)-(ii), , (4) (a)-(iv), (Ci), (c)-Cii), (d)-(iii), , (4), , Choose the correct option for the total pressure, (in atm.) in a mixture of 4 g Og and 2 g Hy, confined in a total volume of one litre at O°C is:, , [Given R = 0.082 L atm mol !K!, T=273K], (1) 2.518 (2) 2.602, (3) 25.18 (4) 26.02, , (3), CH3CH2COO Na* rs CH3CH3 +NagCO3., , [Fe(CN),]* | (iii), , , , [Fe(H20).]* | (iv) 1.73 BM, , , , , , , , , , , , , , Consider the above reaction and identify the, missing reagent/chemical., , (1) BoHe (2) Red Phosphorus, (3) CaO (4) DIBAL-H, , (3), , For irreversible expansion of an ideal gas under, isothermal condition, the correct option is :, (1) AU = 0, AS.) = O (2) AU # 0, AS.) # O, (3) AU = 0, ASiotas # O (4) AU # 0, ASiota = O, (3), , In which one of the following arrangements the, given sequence is not strictly according to the, properties indicated against it ?, , (1) HF < HCl, < HBr < HI, (2) H2O < HeS, , < H2Se < HaTe, , (3) NH3 < PH3, , < AsH3 < SbH3, , (4) COeg < SiOg, , < SnOz < PbP2, , Ans. (2), , , , Increasing acidic, strength, Increasing pK,, values, Increasing, acidic character, Increasing, oxidizing power, , , , 91., , Ans., , 92., , Ans., , 93., , Ans., , The molar conductivity of 0.007 M acetic acid, is 20 S cm? mol"!. What is the dissociation, constant of acetic acid ? Choose the correct, option., , i: =350Scm’mol* |, , Ae coo" = 50Scm’*mo!?, 3 a, , (1) 1.75 x 107 mol L7}, (2) 2.50 x 10* mol L-!, (3) 1.75 x 10° mol L!, (4) 2.50 x 10°° mol L"!, , (3), The slope of Arrhenius Plot [ink v/s | of first, , order reaction is -5 x 10° K. The value of E, of, the reaction is. Choose the correct option for your, answer., , [Given R=8.314 JK mol}], (1) 41.5 kJ mor! (2) 83.0 kJ mor?, (3) 166 kd mol! (4) -83 kd mot!, , (1), The product formed in the following chemical, reaction is, , O O, , I, ; ones, CH,, , i, CH,--OCH,, , OH, CH;, , NaBH, ., CH,OH” :, , OH, , (1), , O, , CH,-CH,-OH, (2), CH,, , i, cts, , OH, CH,, , i, CH,-C-OCH,, , H, , (3), , (4), CH,, (4)