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The function of ZnCl(2) in Lucas test fo...

The function of `ZnCl_(2)` in Lucas test for alcohols is `:`

A

To act as acid catalyst and react with HCl to form `H_2ZnCl_4`

B

To act as base catalyst and react with NaOH to form `Na_2Zn(OH)_4`

C

To act as amphoteric catalyst

D

To act as neutral catalyst

Text Solution

Verified by Experts

The correct Answer is:
A
To act as acid catalyst and react with HCl to form `H_2ZnCl_4`
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Alcohols are acidic in nature because hydrogen is attached to oxygen which is an electronegative element. Alcohol is weaker acid than water because OH^(-) ion is more stable than R-O^(-) ion. R-O^(-) is less stable, due to +I effect of the alkyl group. Acidity of alcohols increases with increase in the stability of acid anion. Some alcohol like CH_(3)-OH, CF_(3)-CH_(2)-OH, (CF_(3))_(3)C-OH ae more acidic than water. Lucas test of alcohols involves following reaction : R-OH+underset("conc.")(HCl)underset(ZnCl_(2))overset("anhydrous")(rarr)underset("white turbidity")(RCl)+H_(2)O Select the correct statements for the Lucas test.