A) \[S\] and \[Cl\]
B) \[N\] and \[S\]
C) \[N\]
D) \[S\]
Correct Answer: B
Solution :
Acidified sodium fusion extract on addition of ferric chloride solution gives blood red colouration, which confirms the presence of N and S. \[3NaCNS+aq.\,FeC{{l}_{3}}\xrightarrow{{}}\underset{(ferric\,thiocyanide)}{\mathop{\underset{red}{\mathop{Fe{{(CNS)}_{3}}}}\,+3{{H}_{2}}O}}\,\]
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