Analytical Chemistry Question 289
Question: Sodium nitroprusside, when added to an alkaline solution of sulphide ions, produces purple colour ion due to the formation of
[IIT 1995]
Options:
A) $ Na[ Fe{{( H_2O )}_5}NOS ] $
B) $ Na_2[ Fe{{( H_2O )}_5}NOS ] $
C) $ Na_3[ Fe{{( CN )}_5}NOS ] $
D) $ Na_4[ Fe{{( CN )}_5}NOS ] $
Show Answer
Answer:
Correct Answer: D
Solution:
$ Na_4[ Fe{{(CN)}_5}NO ]\ +\ {S^{2-}}\ \to \underset{\begin{smallmatrix} \text{Sodium thio-nitroprusside} \\ \text{(violet)} \end{smallmatrix}}{\mathop{\ Na_4[ Fe{{(CN)}_5}NOS ]}} $
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