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A sodium salt on treatment with MgCl2 gi...

A sodium salt on treatment with `MgCl_2` gives white precipitate only on heating. The anion of sodium salt is:

A

`HCO_3^(-) `

B

`CO_3^(2-)`

C

`NO_3^(-) `

D

`SO_4^(2-)`

Text Solution

Verified by Experts

The correct Answer is:
A
`MgCl_2 + NaHCO_3 to underset("Soluble")(Mg(HCO_3)_2)+2NaCl`
`Mg(HCO_3)_2 overset("heat")to MgCO_3 + H_2O + CO_2 uarr `
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