MHT CET 2022 Chemistry question

Identify cationic complex from following.

(A)Trioxalatocobaltate (III) ion
(B)Triamminetrinitrocobalt (III)
(C)Pentamminechlorocobalt (II) sulphateCorrect
(D)Tetracyanonickelate (II) ion

Answer: (C)

Solution

A cationic complex is one in which the coordination sphere carries a net positive charge (named with the metal name unchanged, without the suffix -ate). (c) Pentamminechlorocobalt(II) sulphate is the salt of the complex cation with the sulphate counter ion; the cobalt is in the +2

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Question ID VK-093539