1.

Chromic salts (Cr^(3+)) can be reduced to chromous salts (Cr^(2+)) by adding metals(s) to the salt solution acidified with dil. H_(2)SO_(4)

Answer»

Sn
Fe
Zn
All the three.

Solution :Such REDUCTIONS were once believed to be DUE to nascent HYDROGEN. But infact it is not so. This reduction can only be CARRIED out with `Zn//H^(+)`.


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