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An inorganic cation has been precipitate...

An inorganic cation has been precipitated from water by the addition of NaOH. When we find that the precipitate may be redissolved upon the addition of NaOH or dilute `HNO_3` , we may conclude that the precipitate was

A

amphoteric

B

colloidal

C

amorphous

D

anthropomorphic

Text Solution

Verified by Experts

The correct Answer is:
A
This precipitate reacts with acid or base and therefore , is amphoteric . It could be aluminium hydroxide.
`Al(OH)_3 + 3H^(+) to Al^( + + +) + 3H_2O`
`Al(OH)_3 + OH^(-) to Al(OH)_4`
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