Page 1 : 2-12th-Halogen Derivatives of Alkanes and Arenes -, , SARASWATI I I T ACADEMY, Chandani Chowk , Front of Kwality Bakery, Near Dharamasi Hospital, Sangli, Time :1.00 hrs, , SUB : Chemistry - 12th, , Marks :120, , Each question carry +4 marks , for wrong one -1 mark, 1., , The reaction CH3Br + OH− → CH3OH + Br− . Proceeds by the mechanism ………………, (a) SN1, , 2., , (b) SN2, , (b) CCl4, , (c) CH3OH, , (d) HCOOH, , (b) ethene, , (c) ethanol, , (d) nitroethane, , (b) (S)-2- iodobutane (c) (+)-2- iodobutane, , (d) 2-butane, , Ethyl alcohol is heated with bleaching powder and water. The final product formed is ………………, (b) CH3CH2Cl, , (c) Cl3CCO2H, , (d) CHCI3, , Which of the following does not respond positively to the Iodoform test ?, (a) ethanol, , 9., , (d) CF2Cl2, , (R)-2-bromobutane is allowed to react with NAI in acetone. The product formed is ……………….., , (a) CI3CCHO, 8., , (c) CF4, , (b) HCOONa, , (a) (R)-2-iodobutane, 7., , (d) hexane, , The product formed in the reaction of alcoholic silver nitrite with ethyl bromide is ………………., (a) ethane, , 6., , (c) propane, , Which of the following compounds is formed when chloroform is heated with aqueous NaOH ?, (a) CH3COONa, , 5., , (b) cyclopropane, , Which of the following compounds is used as a refrigerant ?, (a) COCl4, , 4., , (d) SE2, , 1 , 3-dibromopropane reacts with metallic zinc to form …………, (a) propene, , 3., , (c) SE1, , (b) ethanal, , (c) benzophenone, , (d) acetophenone, , Chloroform on heating with caustic soda in water gives ………………., (a) COCl2, , (b) CCl2, , (c) HCO2H, , (d) HCO2Na, , 10. Auto-oxidation of chloroform in air and sunlight produces a poisonous gas known as …………….., (a) chloropicrin (b) mustard gas, , (c) lewisite, , (d) phosgene, , 11. The compound that will react most readily with NaOH to form methanol is ……………………, (a) (CH3)4N+T−, , (c) (CH3)3S+T−, , (b) CH3OCH3, , (d) (CH3)3CCI, , 12. Which will react with water ?, (a) CHCl3, , (b) Cl3CCHO, , (c) CCl4, , (d) ClCH2CH2Cl, , 13. PVC has repeating units of ……………….., (a) 1,1-dichloroethene, , (b) chloroprene, , (c) chloroethene, , (d) 1 ,2-dichloroethene, , 14. Among the following compounds , the one which has the highest percentage of chlorine is ………………., (a) chloral, , (b) pyrene, , (c) PVC, , (d) gammexane, , 15. Ethyl alcohol gives ethyl chloride on treatment with ……………….., (a) NaCl, , (b) Cl2, , (c) SOCl2, , (d) BeCl2, , 16. An equimolar mixture of methyl iodide and ethyl iodide is heated with sodium in dry ether. The number of, possible alkane products is ……………………., (a) 1, , (b) 2, , (c) 3, , (d) 4, , Saraswati IIT Academy, Sangli Ph. Ravi Rai - 99210 29505, Manish Singh - 98600 67375, , 1

Page 2 : 2-12th-Halogen Derivatives of Alkanes and Arenes 17. Benzyl chloride can be prepared from toluene by chlorination with ………………….., (a) SOCl2, , (b) SO2Cl2, , (c) Cl2, , (d) both b and c, , 18. Which of the following reagents will not convert ethyl alcohol into ethyl chloride ?, (a) HCl – ZnCl2, , (b) PCl5, , (c) NaCl, , (d) SOCl2, , 19. Which of the following processes does not occur during the formation of CHCl3 from C2H5OH and bleaching, powder ?, (a)oxidation, , (b) chlorination, , (c) hydrolysis, , (d) reduction, , 20. An SN2 reaction to an asymmetric carbon of a compound always gives ………………., (a) an enan tiometer of the substrate, , (b) a product with opposite optical rotation, , (c) a mixture of diastereomers, , (d) a single stereoisomer, , 21. 1, 3-dibromopropane reacts with metallic zinc to form ……………………, (a) propene, , (b) cyclopropane, , (c) propane, , (d) hexane, , 22. Which of the following is used as a fire extinguisher under the name Pyrene ?, (a) CO2, , (b) CCl4, , (c) CH2=CHCl (d) ClCH=CHCl, , 23. Which of the following compounds is formed when chloroform is heated with aqueous NaOH ?, (a) CH3COONa, , (b) HCOONa, , (c) CH3OH, , (d) HCOOH, , 24. When an excess of ethyl chloride is heated with concentrated ammonia , the major product formed is …………, (a) ethyl amine (b) diethyl amine, , (c) ethylene diamine (d) tetra ethyl ammonium chloride, , 25. The compound obtained by heating a mixture of an aliphatic primary amine and chloroform with alcoholic, KOH is :, (a) alkyl isocyanate, , (b) alkyl cyanide, , (c) alkyl cyanate, , (d) alkyl isocyanide, , 26. Chloretone , which acts as a sedative and a hypnotic agent , is prepared by heating ……………, (a) acetone with chlorine, , (b) acetone with chloroform in the presence of dilute alkali, , (c) chloroacetone with alkali, , (d) Acetophenone with chloroform, , 27. Which of the following statement is not true about chloroform ?, (a) it is used as an anaesthetic, , (b) it is good organic solvent, , (c) it has an ideal sp3 hybridized carbon (d) it is carcinogenic, 28. 2-Bromopentane is heated with potassium ethoxide in ethanol. The major product is ………………., (a) trans-2-pentene, , (b) 2-ethoxy pentane (c) 1-pentene (d) cis-2-pentene, , 29. The reagent which reacts with 1-chlorobutane to give a substitution product mainly is ……………, (a) AlCl3, , (b) KOH/MeOH, , (c) NaCN, , (d) Mg/Et2O, , 30. The most reactive alkyl halide towards SN2 reaction is …………….., (a) CH3X, , (b) R3CX, , (c) R2CHX, , (d) RCH2X, , Saraswati IIT Academy, Sangli Ph. Ravi Rai - 99210 29505, Manish Singh - 98600 67375, , 2