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Alum is found to contain hydrated monova...

Alum is found to contain hydrated monovalent cation `[M(H_(2)O)_(6)]^(+)` trivalent cation `[M'(H_(2)O)_(6)]^(+)` and `SO_(4)^(3-)` in the ratio of:

A

`1:1:1`

B

`1:2:3`

C

`1:3:2`

D

`1:1:2`

Text Solution

Verified by Experts

The correct Answer is:
D
Formula of alums contain the ions `[M(H_(2)O)_(6)]^(+),[M'(H_(2)O)_(6)]^(3+)` and `SO_(4)^(2-)` in the ratio `1:1:2` Example : (i)Potash alum `K_(2)SO_(4).Al_(2)(SO_(4))_(3).24H_(2)O` , (ii)Chrome alum `K_(2)SO_(4).Cr_(2)(SO_(4))_(3).24H_(2)O`
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