Assertion : Aqueous solution of the compound `CoCl_3. 4 NH_3` when treated with excess of `AgNO_3` 1 mole of AgCl is precipitated.
Reason : The compound `CoCl_3. 4NH_3` has six primary valencies and one secondary valency.

Options

A. If both (A) and (R) are correct and (R) is the correct explanation of (A).
B. If both (A) and (R) are correct, but (R) is not the correct explanation of (A).
C. If (A) is correct, but(R) is incorrect.
D. If both (A) and (R) are incorrect.

Answer

C

Explanation

The compound `CoCl_3. 4 NH_3` has six secondary valencies and one primary valency as only primary valencies are ionisable.