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Dehydration of Alcohols

Cyclohexene i...

Question

Cyclohexene is best prepared from cyclohexanol by which of the following:

conc.

H_{3} P O_{4}

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conc.

H C l / Z n C 1_{2}

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conc. HCl

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conc. HBr

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Solution

The correct option is A conc. $H_{3} P O_{4}$
Cyclohexene is best prepared from cyclohexanol by using conc. $H_{3} P O_{4}$ .

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H_{2} S O_{4.}

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C_{6} H_{12} O c o n . H_{2} S O_{4} - ----- \to C_{6} H_{10}

The best method of prepare cyclohexene from cyclohexanol is by using

H C l

N a C l

H_{2} S O_{4}

H I

N a I

H_{2} S O_{4}

Why is conc. HCl not used in place of conc. $H_{2} S O_{4}$ in the laboratory preparation of nitric acid?

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