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‐

Question

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 the polarity of the solvent.
v) Sigma complex or arenium ion is resonance stablised.

TestHub · Accepted Answer

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.

Chemistry - Halogen Derivative Question with Solution | TestHub

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