1.

Soda extractof a salt solution in acidified with excessof dil CH_(2)COOH and CaCI_(2) soinis added Awhite pptinsolable in CH_(3)COOH confurm of

Answer»

`C_(2)O_(4)^(2-)`
`CO_(3)^(2-)`
`HCO_(3)^(Theta)`
`S_(2)O_(3)^(2-)`

Answer :a


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