1.

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

Answer»

S and CI
N and S
N
S

Solution :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 toNaCNS`(sodium thiocyanate)
`Fe^(3+) + CNS^(-)rarr Fe(CNS)_(3)`(blood red ppt.)


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