Question

Which of the following is an alum?

A

B

C

D

Medium
Updated on : 2022-09-05
Solution
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Correct option is B)

Alum is double sulphate of trivalent metal like iron, aluminium, chromium etc. and a univalent metal such as potassium or sodium with molecules of water. 

e.g.

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Solve any question of Hydrogen with:-
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