How many of the statement(s) are correct i) The nucleophile makes a rear attack in S N 2 reaction and expels the leaving group from front side. ii) C H 3 O - C H = C H 2 adds to HBr according to Anti‐Markownikoff’s rule. iii) The basicity o

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How many of the statement(s) are correct i) The nucleophile makes a rear attack in S N 2 reaction and expels the leaving group from front side. ii) C H 3 O - C H = C H 2 adds to HBr according to Anti‐Markownikoff’s rule. iii) The basicity of halides decreases in the order F - > C 1 - > B r - > I - , but the nucleophillicity is reverse of it. (in polar protic solvents) iv) The rate of S N 2 reaction is independent of

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Correct answer: 3

i) The nucleophile makes a rear attack in S N 2 reaction and expels the leaving group from front side. iii) The basicity of halides decreases in the order F - > C 1 - > B r - > I - , but the nucleophillicity is reverse of it. (in polar protic solvents) v) Sigma complex or arenium ion is resonance stablised. The above statements are correct. C H 3 O - C H = C H 2 adds to HBr according to Markownikoff’s rule. iv) The rate of S N 2 reaction is faster in polar aprotic solvent.

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