Acidified sodium fusion extract on addition of ferric chloride solution gives blood red colouration which confirms the presence of

Options

A. S and CI
B. N and S
C. N
D. S

Answer

B

Explanation

Acidified sodium fusion extract on addition of ferric chloride solution gives blood red colouration, which confirms the presence of N and S.
Sodium metal (if not used in excess) in compounds containig N and S together forms sodium thiocyanate.
`Na + C + N + S to NaCNS`(sodium thiocyanate)
`Fe^(3+) + CNS^(-) rarr Fe(CNS)_(3)`(blood red ppt.)