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A colourless crystalline salt 'X' is sol...

A colourless crystalline salt 'X' is soluble in dilute HCl. On adding NaOH solution, it gives a white precipitate which is insoluble in excess of NaoH. 'X' is

A

`Al_(2)(SO_(4))_(3)`

B

`ZnSAO_(4)`

C

`MgSO_(4)`

D

`SnCl_(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
`MgSO_(4)` is soluble in dilute HCl. When `NaOH` is added , it gives a white ppt of magnesium hydroxide which is insoluble in excess of NaOH .
`MgSO_(4) + 2HCl to MgCl_(2) + H_(2)SO_(4)`
`MgSO_(4) + 2NaOH to underset("(White ppt)")(Mg(OH)_(2)) + Na_(2)SO_(4)`
`Mg(OH)_(2) + NaOH to` No reaction.
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