Vijayakarnataka CET Chemistry Practice paper - 02

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1 Vijayakarnataka CET Chemistry Practice paper The number of ions formed when cuprammonium sulphate is dissolved in water is (1) one (2) two () four (4) zero 2. The functional group present in oils and fats is (1) alcoholic group (2) carboxyl group () ester group (4) ketonic group. For the reaction H 2(g) + Br 2(g) 2HBr (g), the experimental data suggest, rate = k [H 2 ] [Br] 1/2. The molecularity and order of the reaction are respectively 1 (1) 2, (2), () 1, 1 (4) 1, For the decomposition of a substance, k = at 298 K and at 08 K, activation energy of the reaction is (1) kj mol 1 (2) 86.8 kj mol 1 () kj mol 1 (4) kj mol 1 5. Three Faradays of electricity was passed through an aqueous solution of iron (II) bromide. (The atomic weight of iron is 56). The mass of iron deposited at cathode is (in gms) (1) 56 (2) 84 () 112 (4) ml of 0.4 N NaOH is mixed with 20 ml of 0.1 N HCl. The ph of the resulting solution is (1) 5 (2) 7 () (4) 1 7. The reaction between an alkylhalide and alcoholic sodium ethoxide is called (1) Fittig s reaction (2) Wurtz reaction () Williamson s reaction (4) Wurtz-Fittig s reaction 8. Among the halogens, the electron affinity from chlorine to iodine (1) decreases (2) remains same () fluctuates (4) increases 9. In the reaction, Phenol + CHCl + NaOH heat X HCl Y. Compound Y is (1) salicylaldehyde (2) salicylic acid () phenol and formaldehyde (4) urea and formaldehyde 10. Homolytic fission of a sigma bond forms (1) a positively charged particle and a negatively charged particle (2) two neutral particles () two negatively charged particles (4) a positive ion and a neutral species 11. Which of the following reagents cannot be used to distinguish between glucose and fructose? (1) Fehling s solution (2) Tollen s reagent () Benedicts solution (4) all of (1), (2), () 12. In the test for primary amines, the amine is treated with CHCl and KOH and a bad smelling compound is formed. If the primary amine used is ethylamine, identify the bad smelling compound formed? (1) CH NCO (2) CH CNO () CH CH 2 NC (4) CH CN PU CET / Chemistry / Vijayakarnataka / 02 1

2 1. The number of molecules are maximum in (1) 6 gm of water (2) 28 gm of CO 2 () 46 gm of CH OH (4) 54 gm of CH OH 14. Physical adsorption is quite appreciable (1) at room temperature (2) at higher temperature () at lower temperature (4) at all temperatures 15. The number of particles in one unit cell of a face centred cubic lattice is (1) 2 (2) () 4 (4) A characteristic feature of transition metals is that (1) they show variable oxidation states (2) they show inert pair effect () they do not form complex ions (4) they exhibit diamagnetic property 17. Acetylene reacts with excess of HBr to give (1) 1, 2-dibromo ethane (2) 1, 1-dibromoethane () bromo ethane (4) bromo methane 18. Which of the following has fractional bond order? 2+ (1) O 2 (2) 2 O 2 () O 2 (4) 19. During the estimation of nitrogen by Kjeldahl s method, K 2 SO 4 is added to (1) raise the boiling point of H 2 SO 4 (2) absorb water formed () catalyse the reaction (4) form ammonium sulphate Methyl-2-butene can be represented as (1) CH CH CH 2 CH (2) CH C CHCH CH CH () CH CH 2 C CH 2 (4) CH 2 C CH CH 2 CH CH 21. The EMF of the cell Mg / Mg (0.01 M) Sn (0.1 M) / Sn Mg Sn (given E = 2.4 V, E = 0.14 V) at 298 K is (1) 2.17 V (2) 2.2 V () 2.51 V (4) 2.45 V 22. If 900 J per gram of heat is absorbed at the boiling point of water, the increase in entropy is (1) 4.4 J mol 1 (2) 87.2 J mole () 900 J mol 1 (4) zero 2. The number of d-electrons in [Cr(H 2 O) 6 ] + (1) 2 (2) () 4 (4) The stability of the colloidal particles is due to (1) neutral nature of the colloidal particles (2) oppositely charged nature () similar charge on them (4) non reactivity of the particle 25. The major product of nitration of benzoic acid is (1) -nitro benzoic acid (2) 4-nitrobenzoic acid () 2-nitro benzoic acid (4) 2, 4-dinitro benzoic acid 26. Given, H 2(g) 2H (g) ; H = k cal. The H H bond energy is (1) k cals (2) k cals () 52.1 k cals (4) zero 27. For the gaseous reaction, C 2 H 4(g) + H 2(g) C 2 H 6(g), H = 2.7 k cal, carried out in a closed container, the equilibrium concentration of C 2 H 4 can be increased by (1) increasing the temperature (2) decreasing the pressure () removing H 2 (4) all of (1), (2), () + O 2 PU CET / Chemistry / Vijayakarnataka / 02 2

3 28. The ionization constant K a for the equilibrium, HA H + + A ; depends on (1) concentration of the acid (2) temperature () forward reaction (4) dilution 29. Alloy is an example of (1) gel (2) aerosol () solid sol (4) emulsion 0. Which one of the following is a synthetic polymer? (1) starch (2) silk () neoprene (4) protein 1. A solution of an acid has ph = 4.7. The concentration of OH (pk w = 14) is (1) (2) () (4) A sulfide ore in the following is (1) copper pyrites (2) malachite () carnallite (4) magnetite. Phenol dissolves in sodium hydroxide, forming (1) sodium alkoxide (2) phenolate () sodium salicylate (4) sodium phenate aq. KOH, Na CH Br 4. Given, CH Br A B C. C is (1) ethane (2) diethyl ether () dimethyl ether (4) ethyl bromide 5. A, B, C and D are four elements whose standard reduction potentials are V, 2.71 V, 1.67 V and 2.87 V. The strongest reducing agent is (1) A (2) B () C (4) D 6. Which of the following compounds is coloured? (1) Ag 2 SO 4 (2) Cu 2 Cl 2 () CuF 2 (4) MgF 2 7. In which of the following compounds, the central atom follows the EAN rule? (1) K [Fe(CN) 6 ] (2) [Cu(NH ) 4 ]SO 4 () [Cr(H 2 O)]Cl (4) K 4 [Fe(CN) 6 ] 8. Vinegar is (1) 10 20% acetic acid (2) % acetic acid () 7 10% acetic acid (4) 100% acetic acid heat Br2 / KOH 9. Given CH COOH + NH A B C. The product C is (1) acetamide (2) methyl amine () acetanilide (4) methyl bromide 40. When ethanal is heated with Fehling s solution, it gives a precipitate of (1) CuO (2) Cu 2 O + CuO () Cu 2 O (4) Cu 41. The order of reactivity of various alkyl halides towards S N 1 reaction is (1) > 2 > 1 (2) 1 > 2 > () = 2 = 1 (4) 1 > > Cyclohexane can be present in either chair or boat conformation. The carbon atoms present in the same plane in both conformations are, (1) C 1, C 2, C, C 4 (2) C 2, C, C 5, C 6 () C 2, C, C 4, C 5 (4) C 1, C 2, C, C 5 4. Rancidity of oils and fats is due to (1) partial hydrolysis by the atmospheric moisture and oxidation of fatty acids to foul smelling products (2) absorption of foul smelling ingredients from the air () fermentation caused by the micro-organisms (4) slow decomposition of the fatty acids 44. An electrolytic cell contains a solution of AgNO and platinum electrodes. A current is passed until 1.6 gm of O 2 has been liberated at anode. The amount of Ag deposited at cathode would be (1) 1.6 g (2) 0.8 g () 21.6 g (4) g PU CET / Chemistry / Vijayakarnataka / 02

4 45. Conjugate base of NH is (1) NH 4 OH (2) NH Oxytocin is associated with () NH 2 (4) N 2 H 2 (1) lactation (2) child birth () absorption of water (4) absorption of Ca Among the following which crystal has low melting point (1) covalent (2) ionic () metallic (4) molecular 48. When SO 2 is passed through potassium iodate, the oxidation state of iodine changes from (1) +5 to 0 (2) 5 to 0 () +6 to 1 (4) 6 to Which one of the following is the smallest in size? (1) N (2) O 2 () F (4) Na grams of a metallic chloride contains 5.5 grams of chlorine, the equivalent weight of the metal is (1) 19.5 (2) 5.5 () 9.0 (4) The mole fraction of oxygen in a mixture of 7 grams of nitrogen and 8 grams of oxygen is (1) 8/5 (2) 0.5 () 0.25 (4) The meta-directing group among the following is (1) Cl (2) NO 2 () OH (4) NH 2 5. Given, OH Zn dust CH Cl X anhy. AlCl Y alk. KMnO 4 Z. Z is CH OH COOH (1) (2) () (4) 54. Carboxylic acids are more acidic than phenol and alcohol because of (1) inter molecular hydrogen bonding (2) formation of dimers () highly acidic hydrogen (4) resonance stabilization of their conjugate base 55. Which pair will show common ion effect? (1) BaCl 2 + Ba(NO ) 2 (2) NaCl + HCl () NH 4 OH + NH 4 Cl (4) AgCN + HCN moles of A and 4 moles of B give 2 moles of C and 2 moles D at equilibrium in the reaction A + B C + D. The equilibrium constant of the reaction is 1 (1) 1 (2) 2 () 4 (4) The compounds CH H CH C C and C H CH H C CH H can be distinguished by their 1) chlorinated products (2) brominated products () reaction with H 2 /Ni (4) boiling points 58. The ligand that forms a chelate is (1) acetate (2) oxalate () cyanide (4) ammonia PU CET / Chemistry / Vijayakarnataka / 02 4

5 / HCl / 59. Given R COOR + H O R COOH + R OH. The reaction is 2 (1) unimolecular (2) pseudo unimolecular () second order (4) zero order 60. The angle strain in cyclo propane is (1) (2) () (4) 5 16 * * * PU CET / Chemistry / Vijayakarnataka / 02 5