285523 The compound\(A\) (major product) is

Ans:b
Exp:(b) Free radical substitution of alkane part (benzyl free radical) takes place.
The order stability of alkyl free radicals is \(3^{\circ}>2^{\circ}>\) \(1^{\circ}\).

285524 The order of reactivity of the compounds\(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{Br}, \mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}\left(\mathrm{C}_6 \mathrm{H}_5\right) \mathrm{Br}, \mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}\left(\mathrm{CH}_3\right) \mathrm{Br}\) and \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{C}\left(\mathrm{CH}_3\right)\left(\mathrm{C}_6 \mathrm{H}_5\right) \mathrm{Br}\) in \(\mathrm{S}_{\mathrm{N}} 2\) reaction is
Ans:a
Exp:(a) Rate of reaction in\(\mathrm{S}_{\mathrm{N}} 2\) reaction is slow in sterically hindedred molecules.

285525 The major product of the following reaction is
\(\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_2-\mathrm{OH} \xrightarrow[\text { Excess }]{\mathrm{HBr}} \text { Product }\)

285526 Which of the following halide shows highest reactivity towards\(\mathrm{S}_{\mathrm{N}} 1\) reaction?

285523 The compound\(A\) (major product) is

Ans:b
Exp:(b) Free radical substitution of alkane part (benzyl free radical) takes place.
The order stability of alkyl free radicals is \(3^{\circ}>2^{\circ}>\) \(1^{\circ}\).

285524 The order of reactivity of the compounds\(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{Br}, \mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}\left(\mathrm{C}_6 \mathrm{H}_5\right) \mathrm{Br}, \mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}\left(\mathrm{CH}_3\right) \mathrm{Br}\) and \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{C}\left(\mathrm{CH}_3\right)\left(\mathrm{C}_6 \mathrm{H}_5\right) \mathrm{Br}\) in \(\mathrm{S}_{\mathrm{N}} 2\) reaction is
Ans:a
Exp:(a) Rate of reaction in\(\mathrm{S}_{\mathrm{N}} 2\) reaction is slow in sterically hindedred molecules.

285525 The major product of the following reaction is
\(\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_2-\mathrm{OH} \xrightarrow[\text { Excess }]{\mathrm{HBr}} \text { Product }\)

285526 Which of the following halide shows highest reactivity towards\(\mathrm{S}_{\mathrm{N}} 1\) reaction?

285523 The compound\(A\) (major product) is

Ans:b
Exp:(b) Free radical substitution of alkane part (benzyl free radical) takes place.
The order stability of alkyl free radicals is \(3^{\circ}>2^{\circ}>\) \(1^{\circ}\).

285524 The order of reactivity of the compounds\(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{Br}, \mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}\left(\mathrm{C}_6 \mathrm{H}_5\right) \mathrm{Br}, \mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}\left(\mathrm{CH}_3\right) \mathrm{Br}\) and \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{C}\left(\mathrm{CH}_3\right)\left(\mathrm{C}_6 \mathrm{H}_5\right) \mathrm{Br}\) in \(\mathrm{S}_{\mathrm{N}} 2\) reaction is
Ans:a
Exp:(a) Rate of reaction in\(\mathrm{S}_{\mathrm{N}} 2\) reaction is slow in sterically hindedred molecules.

285525 The major product of the following reaction is
\(\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_2-\mathrm{OH} \xrightarrow[\text { Excess }]{\mathrm{HBr}} \text { Product }\)

285526 Which of the following halide shows highest reactivity towards\(\mathrm{S}_{\mathrm{N}} 1\) reaction?

285523 The compound\(A\) (major product) is

Ans:b
Exp:(b) Free radical substitution of alkane part (benzyl free radical) takes place.
The order stability of alkyl free radicals is \(3^{\circ}>2^{\circ}>\) \(1^{\circ}\).

285524 The order of reactivity of the compounds\(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{Br}, \mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}\left(\mathrm{C}_6 \mathrm{H}_5\right) \mathrm{Br}, \mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}\left(\mathrm{CH}_3\right) \mathrm{Br}\) and \(\mathrm{C}_6 \mathrm{H}_5 \mathrm{C}\left(\mathrm{CH}_3\right)\left(\mathrm{C}_6 \mathrm{H}_5\right) \mathrm{Br}\) in \(\mathrm{S}_{\mathrm{N}} 2\) reaction is
Ans:a
Exp:(a) Rate of reaction in\(\mathrm{S}_{\mathrm{N}} 2\) reaction is slow in sterically hindedred molecules.

285525 The major product of the following reaction is
\(\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_2-\mathrm{OH} \xrightarrow[\text { Excess }]{\mathrm{HBr}} \text { Product }\)

285526 Which of the following halide shows highest reactivity towards\(\mathrm{S}_{\mathrm{N}} 1\) reaction?