1. AMU PAST PAPERSCHEMISTRY- UNSOLVED PAPER - 1999

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 Which of the following groups activates benzene nucleus towards electrophilic substiution ? a. - CHO b. - CN c. - COOR d. - OCOR 4. 02 Problem which one is nucleophilic addition ? a. CH3CHO + HCN CH3CH(OH)CN b. CH2 = CH2 + H2 CH3 CH3 c. CH3CH = CH2 + H2 CH3CH2CH3Br d. CH2 = CH2 + Br CH2Br CH2Br 5. 03 Problem The reagent with which both acetaldehyde and acetone react easily is : a. Schiffs reagent b. Tollens reagent c. Grignard reagent d. Fehling solution 6. 04 Problem In the flame test a brick red colour is indication of : a. Ca b. Sr c. K d. Na 7. 05 Problem The haemoglobin from red blood corpuscles of most mammals contain approximately 0.33%of iron by mass. The molecular weight of haemoglobin is 67200. The number of iron atoms in each molecule of haemoglobin is : a. 2 b. 3 c. 4 d. 6 8. 06 Problem Which of the following formula represent to 2-methyl pentane ? a. b. c. d. 9. 07 Problem What is the last product C of the following reaction sequence ? a. b. c. d. 10. 08 Problem Neutron was discovered by : a. Chadwick b. Moseley c. Faraday d. H. Yukama 11. 09 Problem The reaction of ethylene glycol with PI3 gives : a. CH2 = CH I b. I CH = CH I c. ICH2CH2I d. CH2 = CH2- 12. 10 Problem The smallest ion among the following is that of : a. Ca b. Mg c. Li d. Be 13. 11 Problem When phenol is heated with ammonia in presence of anhydrous zinc of calcium chloride, it gives : a. Ethyl amine b. Benzene c. Toluene d. Aniline 14. 12 Problem Which of the following composition is capable of giving only two isomers ? a. C4H10 b. C5H12 c. C3H8 d. C2H6 15. 13 Problem Strongest acid among the following is : a. CCl3COOH b. CF3COOH c. CBr3COOH d. CH3COOH 16. 14 Problem The maximum number of electron in an orbital is : a. 8 b. 6 c. 4 d. 2 17. 15 Problem Which of the following paramagnetic ? a. NO+ b. CO c. CN d. O2 18. 16 Problem What happens when Ca is heated over O2 ? a. Formation of CaO + CaC2 b. CaO + C is formed c. CaC2 + O2 is formed d. None of these 19. 17 Problem Bromine can be liberated form potassium bromide solution by the action of : a. Potassium iodide b. Iodine solution c. Chlorine water d. Sodium chlorine 20. 18 Problem Which reaction will lead to anti markownikoff addition in the presence of a proxide ?HCl a. CH3CH = CH2 HI b. CH3CH = CH2 HBr c. CH3CH - CH2 H2O d. CH3CH = CH2 21. 19 Problem In the electrolysis of alumina, cryolite is added to : a. Increase the electrical conductivity b. Increase the melting point of alumina c. Remove impurities from alumina d. Minimize the anodic effect 22. 20 Problem The energy with which an atom binds the electrons is experimentally determined by measuring its : a. Electron negativity b. Electron affinity c. Atomic size d. Ionization potential 23. 21 Problem Which of the following is a mixed anhydride ? a. N2O5 b. NO2- c. N2O d. NO 24. 22 Problem In halogen acids the order of decreasing acidity is : a. HCl, HBr, HI, HF b. HI, HBr, HF, HCl c. HI, HBr, HCl, HF d. HCl, HBr, HF, HI 25. 23 Problem Which elements are chemically most similar ? a. Ti, Zn b. Zr, Hf c. Na, Al d. Cu, S 26. 24 Problem The atom with atomic number 20 will likely combine with the atom whose atomic number is ? a. 25 b. 21 c. 16 d. 14 27. 25 Problem Which of the following electronic configuration in the outermost shell is characteristic of alkali metals ? a. (n -1)s2p6ns-1 b. (n -1)s2p6ns2np1 c. (n -1)s2p6d1 d. (n -1)s2p6d103s-1 28. 26 Problem A diagonal relationship exist between a. Na and Ca b. Mg and K c. Li and Ca d. Li and Mg 29. 27 Problem Alkali metals cannot be obtained by reduction of their oxides because they : a. Are strong reducing agents b. Are strong oxidizing agents c. Are early reduced d. Decompose water 30. 28 Problem Qualitative test of halogens in an organic compound is made by : a. Lassaignes test b. Beilstein test c. Bayers test d. Fehlings test 31. 29 Problem Dipole moment is shown by : a. trans-1,2-dichloro-2pentene b. trans-1,2-dichloroethane c. cis-1,2-dichloroethene d. both a and c 32. 30 Problem In sulphuric acid the oxidation number of S is : a. + 2 b. + 6 c. - 4 d. - 2 33. 31 Problem 50.c.c. of 0.1 N solution of AgNO3 are added to 500 c.c. of 0.1 N solution of KCl. The concentration of nitrate in the resulting mixture is : a. 0.05 N b. 0.2 N c. 0.1N d. 1 N 34. 32 Problem When chlorine water and carbon tetrachloride are added to a solution of an iodine shaken, the colour produced is : a. Brown b. Yellow c. Orange d. Violet 35. 33 Problem 100 g of a NaOH solution contains 0.1 mole of NaOH, the molality of the solution is : a. 1.04 m b. 4 m c. 5 m d. 10 m 36. 34 Problem A hydrocarbon analysis for C and H are 75% and 25% respectively, then molecular formula is : a. C3H8 b. C2H6 c. C2H4 d. CH4 37. 35 Problem How many moles of oxygen are contained in one litre of air under-standard conditions if it contains 21%(by volume) oxygen ? a. 0.0093 mole b. 0.816 mole c. 0.21 mole d. 2.10 mole 38. 36 Problem The reaction NH4 NO3 N2O 2H2O involves : a. Oxidation b. Reduction c. Both a and b d. None of these 39. 37 Problem Oxidising number of Fe in K3[Fe(CN)6] a. + 1 b. + 2 c. + 3 d. + 4 40. 38 Problem Free-radical reactions are generally catalized by : a. Polar solvents b. Acids c. Bases d. Light 41. 39 Problem The compounds which contains both ionic and covalents bonds is : a. KCN b. KCl c. CH4 d. H2 42. 40 Problem Radio-carbon study make use of carbon isotope with atomic weight : a. 16 b. 15 c. 14 d. 13 43. 41 Problem Variable valency is a characteristic of : a. s-block elements b. p-block elements c. d-block elements d. all elements 44. 42 Problem The roasted ore is heated in a vertical retort with powdered coal and the metal is obtained by condensation of vapours. The metal is : a. Ag b. Fe c. Sn d. Zn 45. 43 Problem In which of the following AgCl will be least soluble ? a. 0.01 1 M NaCl b. 0.01 M CaCl4 c. 0.001 M AgNO3 d. Pure water 46. 44 Problem The ester of 1, 2, 3 propartroid are called : a. Glyceric acids b. Glycerides c. Glycerines d. Glycerels 47. 45 Problem In sodium acetate is added to acetic acid then the concentration of H+ ion will be : a. Increased b. Decreased c. Un-affected d. PH decreased 48. 46 Problem Oxidation of toluene in the presence of acetic anhydride followed by alkaline hydrolysis yields : a. Benzene b. Phenol c. Benzaldehyde d. Benzoic acid 49. 47 Problem Which of the following possesses highest melting point ? a. Chlorobenzene b. o-dichlorobenzene c. m-dichlorobenzene d. p-dichlorobenzene 50. 48 Problem the specific rate constant of a first order depends on the : a. concentration of the product b. concentration of the reactant c. temperature d. time 51. 49 Problem Which of the following will not give HVZ reaction ? a. Trichloroethanoic acid b. 2-methyl botanic acid c. Ehtanonic acid d. Propanoic acid 52. 50 Problem Faradays law of electrolysis are related to the : a. Speed of the cation b. Atomic number of the cation c. Atomic number of the anion d. Equivalent weight of the electrolyte 53. FOR SOLUTIONS VISIT WWW.VASISTA.NET