Aside from concentrated sulphuric acid,what other acid is employed in the dehydration of alcohols?

Concentrated hydrochloric acid

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Conc.acetic acid

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Conc.phosphoric acid

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Conc.acetone

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Solution

The correct option is C Conc.phosphoric acid
Dehydration of alcohols using an acid catalyst
The acid catalysts normally used are either concentrated sulphuric acid or concentrated phosphoric(V) acid, $H_{3} P O_{4}$ . Both of these are powerful oxidising agents.
Phosphoric(V) acid tends to be used in place of sulphuric acid because it is safer and produces a less messy reaction. Phosphoric(V) acid isn't a strong oxidising agent.

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