The best method to prepare cyclohexene from cyclohexanol is by using

$c o n c . H C l$

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$H B r$

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$c o n c . H_{3} P O_{4}$

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$c o n c . H C l + Z n C l_{2}$

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Solution

The correct option is C
$c o n c . H_{3} P O_{4}$

The best method to prepare cyclohexene from cyclohexane is by using $c o n c . H_{3} P O_{4}$ because among given options dehydrating agent is only $C o n c . H_{3} P O_{4}$ . The other reagents may give substitution products as well. Hence the choice:

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