If on adding `FeCl_(3)` solution to acidifies Lassaigne's solution a blood red coloration is produced, it indicates the presence of

Options

A. `S`
B. `N`
C. `N` and `S`
D. `S` and `Cl`

Answer

C

Explanation

If both `N` and `S` are present in the organic compound, they may combine during sodium fusion to form `NaSCN` due to insuffifient `Na`. On heating with the solution of `Fe^(3+)` ions, a blood red coloration due to ferric thiocyanate is produced.
`Fe^(3+) overset(3NaSCN)rarr Fe(SCN)_(3) + 3Na^(+)`
Blood red coloration