explain why dehydration of alcohols to form alkenesis always carried out with conc. H₂SO₄and not with conc. HCl or HNO₃

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Solution

Dehydration of alcohols to form alkene is carried out by conc.H₂SO₄ not HNO₃ or HCl is due to dehydrating power of conc.H₂SO₄. Concentrated sulphuric acid act as dehydrating agent. As the water is formed in the reaction it will remove the water molecules from the reaction. Concentrated Nitric acid and concentrated Hydrogen chloride are not dehydrating agent.

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