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A soldium salt of unknown anion when tre...

A soldium salt of unknown anion when treated with `MgCl_(2)` gives white precipitate only on boiling. The anion is:

A

`SO_(4)^(2-)`

B

`HCO_(3)^(-)`

C

`CO_(3)^(2-)`

D

`NO_(3)^(-)`

Text Solution

Verified by Experts

The correct Answer is:
B
The salt is `NaHCO_(3)`
`2NaHCO_(3) + MgCl_(2) rarr underset(("White ppt"))underset(MgCO_(3))underset(darr "heat")(Mg(HCO_(3))_(2))+ 2NaCl`
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