Question

Which of the following will give blood red colour with `FeCl_(5)` in sodium extract?
A. `NH_(2)CONH_(2)`
B. `NH_(2)CSNH_(2)`
C. `CH_(5)NHNH_(2)`
D. `CH_(3)C-=N`

Answer 1

Correct Answer - B
(b) is correct answer because it contais `N` and `S`, therefore it will form`NaSCN` which reacts with `FeCl_(3)` to give ferric thiocyanate, which is blood red in colour.
a,c,d are not possible because they do not contain sulphur.