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Aqueous solution of potash alum is:...

Aqueous solution of potash alum is:

A

alkaline

B

acidic

C

neutral

D

soapy

Text Solution

Verified by Experts

The correct Answer is:
B
It is acidic because of the hydrolysis of `Al_(2)(SO_(4))_(3)` according to the following reaction.
`Al_(2)(SO_(4))_(3) + 6H_(2)O to 2Al(OH)_(3) + 3H_(2)SO_(4)`
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