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CHOITHRAM SCHOOL MANIKBAGH INDORE CLASS XII Session: 2016-17 Subject: Chemistry Allotment Date: 12 /08/16 S.No 1. 2. 3. 4. 5. 6. 7. 8. 9. QUESTION MARKS OBJECTIVE TYPE Write the IUPAC name of the following compound: (CH3)2CHCH(Cl)CH3. 1 p-Dichlorobenzene has higher melting point and lower solubility than o- and 1 m-isomers. Allyl chloride is hydrolysed more readily than n-propyl chloride. Why? 1 SHORT ANSWER TYPE I How will you bring about the following conversions? 2 i)Benzyl alcohol to 2-phenylethanoic acid ii)Ethanol to propanenitrile Of the two bromo derivatives, C6H5CH(CH3)Br and C6H5CH(C6H5)Br which 2 one is more reactive in SN1 reaction and why? Although chlorine is an electron withdrawing group, yet it is ortho, para2 directing in aromatic substitution reactions. Explain why it is so ? A hydrocarbon of molecular mass 72 g/mol gives a single monochloro 2 derivative and two dichloro derivative on photochlorination. Give the structures of the hydrocarbon. SHORT ANSWER TYPE II Explain why the dipole moment of chlorobenzene is lower than that of 3 cyclohexyl chloride. Identify the compounds A,B,C,and D in the following sequence of reaction: 3 Conc. H2SO4 10. 11. 12. Assignment No: II Submission Date: 16/08/16 HBr aq.KOH LEVEL Knowledge Understanding hot knowledge understanding logic Hot understanding Multi conceptual I2/NaOH C2H5OH ———> A ———> B ———> C ———> D Also mention the mechanism for the conversion of C2H5OH to A at 443 K. DDT was the first chlorinated organic effective insecticide . The use of DDT increased enormously on a worldwide basis after world war II primarily because of its effectiveness against mosquito that spreads malaria. i)What is the IUPAC name of DDT? ii)How will you prepare DDT? Give a chemical equation iii)Do you think that DDT should be banned in India? Give reason. LONG ANSWER TYPE Give reason for the following : i)Haloalkanes react with KCN to form alkyl cyanides as main product while AgCN forms isocyanides as the major product. ii) Haloarenes are much less reactive than haloalkanes towards nucleophilic substitution reactions. iii)Reaction of alkyl chlorides with aqueous KOH leads to the formation of alcohols but in presence of alcoholic KOH , alkenes are the major products. iv)Chloroform is stored in closed dark coloured bottles completely filled so that air is kept out. v)Grignard’s reagent should be prepared under anhydrous conditions. Primary alkyl halide C4H9Br (A) reacted with alcoholic KOH to give compound (B). Compound (B) is reacted with HBr to give (C) which is an isomer of (A). When (A) is reacted sodium metal it gives compound (D) C8H18 that was different from the compound formed when n-butylbromide is reacted with sodium. Give the structural formula of (A) and write the equationsfor all the reactions. 3 Value based 5 Logic 5 Hot