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Question

Carbocation as an intermediate is likely to be formed in the reaction :

A
Acetone +HCNOH−− acetonecyanohydrin
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B
Hexane anhy.AlCl3/HCl−−−−−−−−− 2-methyl pentane
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C
Propene +Cl2hv 2-chloropropane
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D
Ethylbromide + aq. KOHΔ ethyl alcohol
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Solution

The correct option is A Hexane anhy.AlCl3/HCl−−−−−−−−− 2-methyl pentane
Carbocation intermediate is formed in the reaction :

HexaneanhyAlCl3/HCl−−−−−−−−−2methyl pentane

Hexane on reaction with anhy. AlCl3 undergoes rearrangement reaction forming a secondary carbocation which ultimately forms 2-methyl pentane.

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