Home Chemistry Chemical Analysis Mix Consider following reaction ; Nitrite + Acet…
Chemistry Chemical Analysis Mix Single Correct MCQ
Published on: August 13, 2026

Consider following reaction ; Nitrite + Acetic acid + Thiourea — → N 2 + SCN – + 2H 2 O. Formation of the product in the above reaction can be identified by :

A
FeCl 3 / dilute HCl when blood red colour appears.
B
FeCl 3 / dilute HCl when blue colour appears.
C
K 2 Cr 2 O 7 / HCl when green colour appear.
D
KMnO 4 / HCl when colourless solution is formed.

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Text Solution

Verified by Experts
The correct answer is:
A

Fe 3+ + 3SCN – — → Fe(SCN) 3 (deep red colouration).

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