1.

A salt is heated first with dil. H_(2)SO_(4) and then with conc. H_(2)SO_(4). No reaction takes place. It may be

Answer»

Nitrate
Sulphide
Oxalate
Sulphate

Solution :The salt must have `SO_(4)^(2-) ` GROUP which is ALSO present in the ACID so REACTION does not take place.


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