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  4. During dehydration of alcohols to alkenes by heating with concentrated H2SO4 the initiation step is

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Q. During dehydration of alcohols to alkenes by heating with concentrated $ {{H}_{2}}S{{O}_{4}} $ the initiation step is

Rajasthan PMTRajasthan PMT 2008

Solution:

Protonation of $ -OH $ is first step. Conversion of poor leaving group $ (-OH) $ into good leaving group $ (-\overset{+}{\mathop{O}}\,{{H}_{2}}) $