1.

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

Answer»

`HCO_3^(-) `
`CO_3^(2-)`
`NO_3^(-) `
`SO_4^(2-)`

Solution :`MgCl_2 + NaHCO_3to 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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