Q.

1-pentene reacts with HCl in presence of benzoyl peroxide to give-----as major product.

Moderate

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By Expert Faculty of Sri Chaitanya

1-chloro pentane

2-chloro pentane

2,2-dimethyl -1-chloro propane

1-chloro-3-methyl butane

answer is 2.

(Detailed Solution Below)

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Detailed Solution

H-Cl bond enthalpy is very high. Peroxide cannot break HCl into free radicals. Thus ionic mechanism is followed.CH3-CH2-CH2-CH=CH2→H+CH3-CH2-CH2-C+H-CH2more stable ; CH3-CH2-CH2-C+H-CH2more stable →Cl-CH3-CH2-CH2-CHCl-CH2major ;

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