Which of the following pairs is not dist...

Which of the following pairs is not distinguished by passing `H_2 S`?

A

Hg, Pb

B

Cd Pb

C

As Cu

D

Zn Mn

Verified by Experts

The correct Answer is:

A

`Hg^(2+)` and `Pb^(2+)` are in group II of basic radicals and both forms black precipitate with `H_(2)S`.

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