Which of the following compounds gives blood red colouration when its Lassaigne's extract is treated with alkali and ferric chloride ?

Which of the following compounds gives blood red colouration when its

1.	Which of the following compounds gives blood red colouration when its Lassaigne's extract is treated with alkali and ferric chloride ?
Answer» Phenyl hydrazine Diphenyl sulphide Thiourea Benzamide Solution :Theourea, `H_(2)N-overset("S")overset("\|\|")("C")-NH_(2)` has both N & S. So it GIVES blood red COLOUR in SFE test.