1. UPSEEPAST PAPERSCHEMISTRY- UNSOLVED PAPER - 2000

2. SECTION I Single Correct Answer Type There are five parts in this question. Four choices are given for each part and one of them iscorrect. Indicate you choice of the correct answer for each part in your answer-book bywriting the letter (a), (b), (c) or (d) whichever is appropriate 3. 01 Problem One would expect proton to have very large : a. Ionization potential b. Radius c. Charge d. Hydration energy 4. 02 Problem The mass of 1 mol of electrons is : a. 9.1 x 10-28 g b. 1.008 mg c. 0.55 mg d. 9.1 x 10-27 g 5. 03 Problem The C14 to C12 ratio in a wooden article is 13% that of the fresh wood. Calculate the age of the wooden article. Given that the half-life of C14 is 5770 yr : a. 16988 yr b. 16858 yr c. 15675 yr d. 17700 yr 6. 04 Problem The number of neutrons in the parent nucleus which gives N14 on emission is : a. 7 b. 14 c. 6 d. 8 7. 05 Problem A reversible chemical reaction is having two reactants, in equilibrium. If the concentration of the reactants are doubled then the equilibrium constant will : a. Be doubled b. Become one fourth c. Be halved d. Remain the same 8. 06 Problem Amongst LiCl, RbCl, BeCl2 and MgCl2, the compounds with the greatest and least ionic character respectively are : a. LiCl and RbCl b. MgCl2 and BeCl2 c. RBCl and BeCl2 d. RbCl and MgCl2 9. 07 Problem In which of the following compounds carbon atom undergoes hybridization of more than on type (sp, sp2 and sp3) ? (i) CH3 CH2 CH2 CH3 (ii)CH3 CH = CH CH3 (iii)CH2 = CH CH2 CH3 (iv) H C C H a. (iii) and (iv) b. (i) and (iv) c. (ii) and (iii) d. only (i) 10. 08 Problem This low density of ice compared to water is due to : a. Induced dipole-induced dipole interactions b. Dipole-induced dipole interactions c. Hydrogen bonding interactions d. Dipole-dipole interactions 11. 09 Problem The bond order of in N2+ is : a. 1.5 b. 3.0 c. 2.5 d. 2.0 12. 10 Problem The oxidation number of N in NH3 is : a. + 3 b. + 5 c. - 3 d. 0 13. 11 Problem Which one of the following reactions involves oxidation-reaction ? a. H2 + Br2 2HBr b. NaBr + HCl NaCl + HBr c. HBr + AgNO3 AgBr + HBr d. 2NaOH + H2SO4 Na2SO4 + 2H2O 14. 12 Problem For the electrochemical cell, M |M+||X-|X, E0 (M+ M) = 0.44 V, E0 (X | X-) = 0.33 V From this data, one can deduce that :0 a. E cell = -0.77V b. M+ + X - M + X is the spontaneous reaction c. M + X M+ + X is the spontaneous reaction0 d. E cell - 0.77 V 15. 13 Problem What is the molarity of 0.2 N Na2CO3 solution ? a. 0.1 M b. 0 M c. 0.4 M d. 0.2 M 16. 14 Problem For the reversible reaction N2(g) + 3H2(g) 2NH3(g) at 5000C, the value of Kp is 1.44 x 10-5 when partial pressure is measured in atmospheres. The corresponding value of Kc with concentration in mol/L is : a. 1.44 x 10-5 / (0.82 x 773)-3 b. 1.44 x 10-5 / (0.082 x 500)-2 c. 1.44 x 10-5 / (8.314 x 773)2 d. 1.44 x 10-5 / (0.082 x 773)-2 17. 15 Problem One litre oxygen gas a STP will weight : a. 1.43 g b. 2.24 g c. 11.2 g d. 22.4 g 18. 16 Problem Rate of a reaction : a. Decreases with increase in temperature b. Increases with increase in temperature c. May increase or decreases with increases in temperature d. Does not depend on temperature 19. 17 Problem The rate constant for the reaction 2N2O54NO2 + O2 is 3.0 x 10-5 s-1. If the rate is 1.4 x 10-5 mol L-1 s-1, then the concentration of N2O5 (in mol L-1) is : a. 0.04 b. 0.8 c. 0.07 d. 0.4 20. 18 Problem A catalyst is a substance which : a. Is always in the same phase as in the reactions b. Alters the equilibrium in a reaction c. Does not participate in the reaction but alters the rate of reaction d. Participates in the reaction and provide an easier pathway for the same 21. 19 Problem The relationship between the values of osmotic pressure of 0.1 M solutions of KNO3 (P1) is : P1 P2 a.P1P2 P1P2 b. P1 > P2 c. P2 > P1 d. P1 = P2 22. 20 Problem An aqueous solution of glucose is 10% in strength. The volume in which 1 g-mol of it is dissolved, will be : a. 9 L b. 1.8 L c. 8 L d. 0.9 L 23. 21 Problem The strongest Bronsted base is : a. ClO 3 b. ClO 2 c. ClO 4 d. ClO- 24. 22 Problem A solution contains 10 mL 0.1 NaOH and 10 mL 0.05 N H2SO4, pH of this solution is : a. Less than 7 b. 7 c. zero d. greater than 7 25. 23 Problem A saturated solution of Ag2SO4 is 2.5 x 10-2 M; The value of its solubility product is : a. 62. 5 x 10-6 b. 6.25 x 10-4 c. 15.625 x 10-6 d. 3.125 x 10-6 26. 24 Problem What is the freezing point of a solution containing 8.1 g HBr in 100 g water assuming the acid to be 90% ionized ? (kf for water = 1.86 K mol-1) : a. 0.850C b. - 3.530C c. 00C d. - 0.350C 27. 25 Problem The pH value for 1/1000 N-KOH solution is : a. 3 b. 10-11 c. 2 d. 11 28. 26 Problem The pH of 0.1 M solution of the following salts increases in the order : a. NaCl < NH4Cl < NaCN < HCl b. HCl < NH4Cl < NaCl < NaCN c. NaCN < NH4Cl < NaCl < HCl d. HCl < NaCl < NaCN < NH4Cl 29. 27 Problem Energy required to dissociate 4 g of gaseous hydrogen into free gaseous atoms is 208 kcal at 250C. The bond energy of H H will be : a. 104 kcal b. 52 kcal c. 10.4 kcal d. 1040 kcal 30. 28 Problem Which one of the following will have highest coagulating power for As2S3 colloid ? a. Al3+ 3 b. PO 4 2 c. SO 4 d. Na+ 31. 29 Problem The density of gold is 19 g/cm3. If 1.9 x 10-4 g of gold is dispersed in one litre of water to give a sol having spherical gold particles of radius 10 nm, then the number of gold particles per mm3 of the sol will be : a. 1.9 x 1012 b. 6.3 x 1014 c. 6. 3 x 1010 d. 2. 4x 106 32. 30 Problem Most acidic oxide is : a. Na2O b. ZnO c. MgO d. P2O5 33. 31 Problem Which element forms maximum compound in chemistry ? a. O b. H c. Si d. C 34. 32 Problem The correct order of acidic strength : a. Cl2O7 > SO2 > P4O10 b. K2 > CaO > MgO c. CO2 > N2O5 > SO3 d. Na2O > MgO > Al2O3 35. 33 Problem The volume strength of 1.5 N H2O2 solution is : a. 8.4 b. 8.0 c. 4.8 d. 3.0 36. 34 Problem Black jack is an ore of : a. Cr b. Sn c. Zn d. Ni 37. 35 Problem Thermite is a mixture of : a. Cr2O3 + Al2O3 b. Fe2O3 + Al c. Fe2O3 + Al2O3 d. Al2O3 + 2Cr 38. 36 Problem Flux is used to : a. Remove silica b. Remove silica and undesirable metal oxide c. Remove all impurities from ores d. Reduce metal oxide 39. 37 Problem Which group is called buffer group of the periodic table ? a. I b. VII c. VIII d. Zero 40. 38 Problem Brass is an alloy of : a. Zn and Sn b. Zn and Cu c. Cu, Zn and Sn d. Cu and Sn 41. 39 Problem Microcosmic salt is : a. Na (NH4) . H2O b. Na(NH3) . HPO4 . 4H2O c. Na(NH4) . HPO4 . 4H2O d. K(NH3) . HPO4 . 4H2O 42. 40 Problem The decomposition temperature is maximum for : a. SrCO3 b. CaCO3 c. MgCO3 d. BaCO3 43. 41 Problem Inorganic benzene is : a. B3H3N3 b. BH3NH3 c. B3H6N3 d. H3B3N6 44. 42 Problem Green house effect is caused by : a. NO2 b. CO c. NO d. CO2 45. 43 Problem The most abundant metal in the earth crust is : a. Al b. Ca c. Fe d. Na 46. 44 Problem Bond energies in NO, NO+ and NO- are such as : a. NO - > NO > NO+ b. NO > NO- NO + c. NO+ > NO > NO- d. NO+ > NO- > NO 47. 45 Problem Iodine is formed when KI reacts with a solution of : a. CuSO4 b. (NH4)2SO4 c. ZnSO4 d. FeSO4 48. 46 Problem Rust is : a. FeO + Fe(OH)2 b. Fe2O3 c. Fe2O3 + Fe(OH)2 d. Fe2O3 and Fe(OH)3 49. 47 Problem The electronic configuration of element with atomic number 24 is : a. 1s2, 2s22p6, 3s23p6 3d4, 4s2 b. 1s2, 2s22p6, 3s23p6 3d10 c. 1s2, 2s22p6, 3s23p6 3d6 d. 1s2, 2s22p6, 3s23p6 3d5, 4s1 50. 48 Problem Ziegler-Natta catalyst is : a. (Ph3P)3 RhCl b. K[PtCl3(C2H4)] c. [Al2(C2H6)6 + TiCl4] d. [Fe(C2H5)2] 51. 49 Problem For gold plating, the electrolyte used is : a. AuCl3 b. HAuCl4 c. K[Au(CN)2] d. None of the above 52. 50 Problem [Sc(H2O)6]3+ ion is : a. colourless and diamagnetic b. coloured and octahedral c. colourless and paramagnetic d. coloured and paramagnetic 53. 51 Problem An organic compound contains 49.3% carbon, 6.84% hydrogen and its vapour density is 73 Molecular formula of the compound is : a. C3H5O2 b. C4H10O2 c. C6H10O4 d. C3H10O2 54. 52 Problem How many isomers can be obtained from C6H14 ? a. 7 b. 5 c. 3 d. 6 55. 53 Problem The IUPAC name of CH3 C C CH (CH3)2 is : a. 4-methyl-2-pentyne b. 4, 4-dimethyl-2-butyne c. methyl isopropyl acetylene d. 2-methyl-4-pentyne 56. 54 Problem The total number of acyclic isomers including the stereoisomers with the molecular formula C4H7Cl : a. 11 b. 12 c. 9 d. 10 57. 55 Problem The IUPAC name of a. 1, 1-dimethyl-1, 3-butanediol b. 2, methyl-2, 4-pentanediol c. 4-methyl-2, 4-pentanediol d. 1, 3, 3-trimethyl-1, 3-propane diol 58. 56 Problem The number of possible enantiomeric pairs that can be produced during mono- chlorination of 2-methylburane is : a. 3 b. 4 c. 1 d. 2 59. 57 Problem Most stable carbonium ion is : a. 2 H5 b. (CH3)3 c. (C6H5)3 d. C6H5 H2 60. 58 Problem Which one of the following possess highest m.p. ? a. Chlorobenzene b. o-dichlorobenzene c. m-dichlorobenzene d. p-dichlorobenzene 61. 59 Problem Dehydration of 2-butanol yield : a. 1-butene b. 2-butene c. 2-butyne d. both a and b 62. 60 Problem Ethylene di bromide on heating with metallic sodium in ether solution yields : a. Ethane b. Ethyene c. 2-butyne d. 1-butene 63. 61 Problem Which of the following is the best to change glycerol to acrolein ? a. P2O5 b. Conc. H2SO4 c. Anhydrous CaCl2 d. KHSO4 64. 62 Problem Which one of the following will most readily be dehydrated in acidic conditions ? a. b. c. d. 65. 63 Problem Cannizaro reaction does not occurs with : a. CH3- CH2OH b. C6H5CHO c. CH3CHO d. CH3 CO CH3 66. 64 Problem Which of the following gases does not form a ketone on treatment with dil. H2SO4 and 1% HgSO4 ? a. C2H6 b. C2H2 c. C3H4 d. All of these 67. 65 Problem Urea is : a. diacidic base b. neutral c. monoacidic base d. amphoteric 68. 66 Problem The acids which do not contain COOH group is : a. ethanoic acid b. picric acid c. lactic acid d. plamitic acid 69. 67 Problem Uroptopine is obtained by the reaction of ammonia with : a. CH3Cl b. HCHO c. NH2CONH2 d. CH3CHO 70. 68 Problem Strongest acid among the following is : a. CF3COOH b. CBr3COOH c. CH3COOH d. CCl3COOH 71. 69 Problem Which amino acid is achiral ? a. Alanine b. Histidine c. Proline d. None of these 72. 70 Problem Hydrolysis of urea yields : a. NH3 b. H2O c. CO2 d. All of these 73. 71 Problem Saccharin is a/an : a. Aliphatic hydrocarbon b. Polynuclear compound c. Sweetening agent d. Sugar 74. 72 Problem Product of the reaction between C6H5NH2,CHCl3 and KOH are : a. C6H5CN + KCl b. C6H5NC + KCl c. C6H5Cl + NH4Cl + KCl + H2O d. C6H5OH + NH4OH + KCl 75. 73 Problem Peptides on hydrolysis give : a. Ammonia b. Amino acid c. Alcohol d. Urea 76. 74 Problem Gasoline is a mixture of : a. Ammonia b. amino acid c. alcohol d. urea 77. 75 Problem In mixture of iso-octane and n-heptane the percentage of heptane is 11, the octane number of this fuel is : a. 89 b. 10 c. 100 d. 80 78. 76 Problem Aniline is separated from a mixture by : a. Fractional crystallization b. Fractional distillation c. Vacuum distillation d. Steam distillation 79. 77 Problem Calcium acetate on heating gives : a. Acetic anhydride b. Acetone c. Acetaldehyde d. Ethyl alcohol 80. 78 Problem The ratio of to bonds in benzene is : a. 2 b. 3 c. 4 d. 8 81. 79 Problem When chloroform is left open in light and air, it forms : a. Phosgene b. Formic acid c. Phosphene d. Carbon tetra chloride 82. 80 Problem The reaction of lucas reagent is the fastest with : a. (CH3)2CHOH b. CH3(CH2)OH c. CH3CH2OH d. (CH3)3COH 83. 81 Problem In an alkaline medium acetaldehyde undergoes : a. Benzoin condensation b. Aldol condensation c. Polymerization d. Cannizaro reaction 84. 82 Problem Complete combustion of CH4 gives : a. CO2 + H2O b. CO2 + H2 c. COCl2 d. CO + CO2 + H2O 85. 83 Problem CH2 = CH2 is : a. Polymer b. Isomer c. Monomer d. Epimer 86. 84 Problem The most reactive hydrocarbon is : a. Ethane b. Methane c. Acetylene d. Ethylene 87. 85 Problem Metal present in vitamin B12 is : a. Co b. Mg c. Fe d. Ca 88. 86 Problem Which one of the following is coinage metal ? a. Zn b. Cu c. Sn d. Pb 89. 87 Problem Producer gas is the mixture of : a. CO + N2 b. CO + H2 c. CO + Water vapor d. N2 + CH4 90. 88 Problem Plaster of Paris is : a. CaSO4 . 2H2O b. CaSO4 . H2O c. CaSO4 . H2O d. CaSO4 . 4H2O 91. 89 Problem Setting of cement is an : a. Exothermic reaction b. Endothermic reaction c. Neither endothermic nor exothermic d. Example of neutralization reaction 92. 90 Problem How many moles of helium gas occupy 22.4 L at 00C and 1 atm pressure ? a. 0.11 b. 1.11 c. 0.90 d. 1.0 93. 91 Problem Which has highest weight ? a. 1 m3 of water b. A normal adult man c. 10 L of Hg d. All have same weight 94. 92 Problem Conc. HNO3 reacts with I2 to form : a. HI b. HOI c. HIO2 d. HIO3 95. 93 Problem For which one of the following reactions Kp = Kc ? a. PCl5 PCl3 + Cl2 b. N2 + O2 2NO c. N2 + 3H2 2NH3 d. 2SO3 2SO2 + O2 96. 94 Problem The orbital angular momentum of an electron is 2 s orbital is : a. Zero h b. 22 h c.21 h d. 22 97. 95 Problem The order of a reaction with rate equal to kC A / 2CB1 / 2 is : 3 a. 1 1 b.23 c. 2 d. 2 98. 96 Problem Coal gas is a mixture of : a. H2O and CO b. H2, CO and CH4 c. H2 and CO d. CH4 and CO 99. 97 Problem Nitration of toluene using fuming sulphuric and nitric acid gives : a. p-nitrotoluene b. o-nitrotoluene c. m-nitrotoluene d. tri-nitrotoluene 100. 98 Problem Volume of 0.6 M NaOH required to neutrlise 30 cm3 of 0.4 M HCl is : a. 30 cm3 b. 45 cm3 c. 20 cm3 d. 50 cm3 101. 99 Problem The heat of neutralization is highest for the reaction between : a. NH4OH CH3COOH b. HNO3 NH4OH c. NaOH- CH3COOH d. HCl NaOH 102. 100 ProblemThe product of reaction between alcoholic silver nitrite with ethyl bromide is :a. Ethaneb. Ethanec. Ethyl nitriled. Nitro ethane 103. FOR SOLUTIONS VISIT WWW.VASISTA.NET