Coordination Compounds 1 Question 21

Passage

The coordination number of $\mathrm{Ni}^{2+}$ is $4$ .

$ \mathrm{NiCl}_2+\mathrm{KCN} \text { (excess) } \longrightarrow A \text { (cyano complex) } $

$ \mathrm{NiCl}_2+\text { conc. } \mathrm{HCl} \text { (excess) } \longrightarrow B \text { (chloro complex) } $

21. The IUPAC name of $A$ and $B$ are

(2006,34 M=12 M)

(a) potassium tetracyanonickelate (II), potassium tetrachloronickelate (II)

(b) tetracyanopotassiumnickelate (II), tetrachloropotassiumnickelate (II)

(c) tetracyanonickel (II), tetrachloronickel (II)

(d) potassium tetracyanonickel (II), potassium tetrachloronickel (II)

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Answer:

Correct Answer: 21. (a)

Solution:

  1. $A=K _2\left[Ni(CN) _4\right] ; \quad B=K _2\left[NiCl _4\right]$

$A$ : Potassium tetracyanonickelate (II)

$B$ : Potassium tetrachloronickelate (II)