Which of the following reagents help in conversion of $C H_{3} C H = C H_{2} \to C H_{3} C H_{2} C H_{2} O H$ ?

N a

/ether

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H B r

/Peroxide followed by aq.

K O H / Δ

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Acidic

K M n O_{4}

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None of these

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Solution

The correct option is B $H B r$ /Peroxide followed by aq. $K O H / Δ$
$N a$ /ether: It is used to synthesize symmetrical alkane from an alkyl halide in Wurtz reaction.

Hydroboration and aq. $K O H$ :
The reaction is shown below:

Here, in the first step, anti-Markovnikov addition of $H B r$ takes place which gives $1$ -Bromopropane and it reacts with aq. $K O H$ in $S_{N} 2$ pathway to give propan- $1$ -ol.

Acidic $K M n O_{4}$ :
It oxidises alkene to carboxylic acid.

Hence, (b) is correct.

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B e - C H_{2} - C H_{2} - B r \to H - C \equiv C - H

P h {C H}_{2} {C H}_{3}

P h C H = {C H}_{2}

R - C H_{2} - O H \to R - C H O :

R - C H_{2} - O H \to R - C H_{3} :

C h_{3} C = C - C H_{3}

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C H_{3} C H_{2} C = C H

C H_{3} C H = C H_{2}

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