Q84 / 180 · NEET 2015 (Phase 1) · Chemistry

Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at $25^{o} C$ ?

Solution

C o C l_{3} \cdot 3 N H_{3}

the complex can be written as

[C o C l_{3} {(N H_{3})}_{3}]

With

C o^{3 +}

oxidation state 3,

C l^{-}

ions & 3,

N H_{3}

molecules be with in the co-ordination sphere Co - Cl bonds in co-ordination sphere not ionisable.

Hence, the correct answer is option: 'A'.