(a) Secondary alcohol xrightarrow[Delta]{H_3P | vedclass

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(B) The dehydration of alcohols in the presence of acid $(H_3PO_4)$ follows the $E_1$ mechanism.The rate-determining step in the $E_1$ mechanism is th

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$a < b$

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(B) The dehydration of alcohols in the presence of acid $(H_3PO_4)$ follows the $E_1$ mechanism.The rate-determining step in the $E_1$ mechanism is the formation of a carbocation intermediate.The rate of reaction is directly proportional to the stability of the carbocation formed.Secondary alcohols form secondary carbocations,while tertiary alcohols form tertiary carbocations.Since tertiary carbocations are more stable than secondary carbocations,the rate of dehydration for tertiary alcohols is higher than that for secondary alcohols.Therefore,the rate of reaction for $(b)$ is greater than $(a)$,which means $a < b$.

$(a)$ Secondary alcohol $\xrightarrow[\Delta]{H_3PO_4}$
$(b)$ Tertiary alcohol $\xrightarrow[\Delta]{H_3PO_4}$
For the above dehydration reaction,the rate of reaction will be:

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$(a)$ Secondary alcohol $\xrightarrow[\Delta]{H_3PO_4}$ $(b)$ Tertiary alcohol $\xrightarrow[\Delta]{H_3PO_4}$ For the above dehydration reaction,the rate of reaction will be: