NEET2023Chemistry-Organic Chemistry
NEET 2023 Chemistry Detection of Elements MCQ Question
Type: MCQ-conceptual-Medium-Class 11
In Lassaigne's extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with Fe³⁺ due to the formation of -
A
NaSCN
B
[Fe(CN)₅NOS]⁴⁻
C
[Fe(SCN)]²⁺
D
Fe₄[Fe(CN)₆]₃ · xH₂O
Correct Answer
Option C
Detailed Explanation
The blood red color is due to the formation of [Fe(SCN)]2+ complex when thiocyanate ions react with Fe3+ ions.
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