which of the following statement(s) is/a...

which of the following statement(s) is/are correct ?

`cis-[Pt(NH_(3))_(2)Cl_(2)]` is used as an anticancer species.

Carboxypeptidase-A is an enzyme and contains zinc.

In the silver electroplating of copper, `K[Ag(CN)_(2)]` is used in place of `AgNO_(3)`.

`CN^(-)` ions show the reducing as well as complexing properties towards metal species.

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The correct Answer is:

A, B, C, D

All statement are correct.

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Which of the following statement(s) is not correct?

The electronic configuration of Cr is [Ar] `3d^(5) 4s^(1)` (At. No. of Cr= 24).

The magnetic quantum number may have a negative, value.

In silver atom, 23 electrons have a spin of one type and 24 of the opposite type. (At. no. of Ag =47).

The oxidation state of nitrogen in `N_3H` is -3.