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An aqueous solution of colourless metal ...

An aqueous solution of colourless metal sulphate `M`, gives a white precipitate with `NH_(4)OH`.This was soluble in excess of `NH_(4)OH`. On passing `H_(2)S` through this solution a white precipitate is formed.The metal `M` in the salt is:

A

`Ca`

B

`Ba`

C

`Al`

D

`Zn`

Text Solution

Verified by Experts

The correct Answer is:
D
`Zn^(2+) + 2NH_(4)OH to Zn(OH)_(2) darr("white")+2NH_(4)^(+)`,
`Zn(OH)_(2)+4NH_(4)OH to Zn(NH_(3))_(4)+6H_(2)O`
`Zn^(2+) + S^(2-) to ZnS` (white)
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