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प्रश्न
In the following pair of halogen compounds, which compound undergoes a faster SN1 reaction?
उत्तर
The activity of halogen compounds in SN1 reaction depends on the stability of the carbocation formed due to ionization. The order of stability is tertiary > secondary > primary. Hence, 3° alkyl chloride is more active than 2° alkyl chloride. Hence, 2° alkyl chloride is more active in SN1 reaction.
will react faster. The carbocation 
will be more stable and hence the reaction will be faster.
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(i)
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\[\begin{array}{cc}
\ce{CH3}\phantom{..}\\
|\phantom{....}\\
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\end{array}\]
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\phantom{..}\ce{H}\\
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\end{array}\]
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\ce{CH3-CH-CH2-CH3}\\
|\phantom{........}\\
\ce{CH3}\phantom{.....}
\end{array}\]
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