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A sodium salt on treatment with MgCl(2) ...

A sodium salt on treatment with `MgCl_(2)` gives white precipitate only on heating. The anion of the sodium salt is

A

`Hco_(3)^(-)`

B

`CO_(3)^(-)`

C

`NO_(3)^(-)`

D

`SO_(4)^(2-)`

Text Solution

Verified by Experts

The correct Answer is:
A
`MgCl_(2) +2NaHCO_(3) to Mg(HCO_(3))_(2) (aq) + 2NaCl`
`Mg(HCO_(3))_(2) (aq) overset(Delta)to underset("(White ppt)")(MgCO_(3) darr) +H_(2)O + CO_(2) uarr`
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