Q 1179691516.     A sodium salt of an unknown anion when treated with `MgCl_2` gives white precipitate only on boiling. The anion is

JEE 2004 Prelims
A

`SO_4^(2−)`

B

`CO_3^(2−)`

C

`HCO_3^−`

D

`NO_3^−`

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