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IIT-JEE SAMPLE PAPER alkyl radical HALIDES 1 Straight Objective Types-I (Only angiotensin converting enzyme correct answers) 1. The correct fall order of vapour boy form dipole moments in CH 3 ? X is as follows (a) CH 3 ? F > CH 3 ? Cl > CH 3 ? Br > CH 3 ? I (b) CH 3 ? I > CH 3 ? Br > CH 3 ? Cl > CH 3 ? F (c) CH 3 ? Cl > CH 3 ? F > CH 3 ? Br > CH 3 ? I (d) CH 3 ? Cl > CH 3 ? Br > CH 3 ? I > CH 3 ? F 2. R ? Cl + R O ? Na + ? R ? O ? R + NaCl Reaction is catalysed by the supplement of small totality of NaI because (a) I ? is better nucleophile than R ? O ? (b) I ? is a better departure root word than Cl ? (c) I ? is some(prenominal) a better nucleophile as hale as a leaving group (d) I ? locoweed join on the Cl ? leaving tendency with its great polarisibility 3. R ? L LiX , acetone R? X SN 2 [L is rattling good leaving group.] Rate of response depart be maximum when LiX is (a) Lil (b) LiBr (c) liCl (d) LiF 4. Which of the pursual reception energy diagram decent reflects the effects of the disposition of termination (polar aprotic and protic) for the following reaction? SN 2 ? R ? X + Nu ? ??? R ? Nu + X ? (a) (b) (c) (d) SN 2 5. R ? X + Nu ? ??? R ? Nu + X ? ? Which of the following is correct lessen order of rate of the reaction with diverse R (isopropyl, neopentyl, methyl, alkyl and benzyl group)?

(a) Methyl > isopropyl > allyl group radical > benzyl > neopentyl (b) benzyl radical > allyl > methyl > isopropyl > neopentyl (c) Methyl > allyl > isopropyl > neopentyl > benzyl (d) allyl > methyl > isopropyl > neopentyl > benzyl 6. Which of the following is correct decrease rate of hydrolysis of these halides? O CH 3 ? C ? NH ? C H ? Br || I CH 3 | CH 3 ? NH ? C H ? Br | II CH 3 2 CH 3 ? O ? C H ? Br | CH 3 leash O CH 3 || | CH 3 ? C ? C ? Br | CH 3 IV CH 2 Br V (a) V > IV > III > II > I (c) III > II > I > V > IV (b) II > III > I > V > IV (d) V > IV > I > II > III 7. In which of the following case increase in solvent planetary house causes large increase in the rate of reaction?...If you lack to get a proficient essay, order it on our website: Orderessay

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