Analytical Chemistry Question 270

Question: The sodium extract prepared from sulphanilic acid, contains $ SC{N^{-}} $ . It gives blood red colouration with

Options:

A) a mixture of $ Na_2S $ and $ CS_2 $

B) $ FeCl_3 $

C) $ FeSO_4 $

D) $ Na_2SO_3 $

Show Answer

Answer:

Correct Answer: B

Solution:

[b] $ SC{N^{-}}+F{e^{3+}}\xrightarrow{{}}\underset{bloodredppt.}{\mathop{Fe{{(SCN)}_3}}} $