Correct pair of compounds which gives blue colouration/precipitate and white precipitate, respectively, when their Lassaigne's test is separately done is

Correct pair of compounds which gives blue colouration/precipitate and

1.	Correct pair of compounds which gives blue colouration/precipitate and white precipitate, respectively, when their Lassaigne's test is separately done is
Answer» `NH_(2)NH_(2).HCl` and `ClCH_(2)COOH` `NH_(2)CSNH_(2)` and `PhCH_(2)Cl` `NH_(2)CH_(2)COOH` and `NH_(2)CONH_(2)` Solution :`NH_(2)NH_(2).HCl` does not contain C and hence does not give blue colour in Lassaigne's TEST. `NH_(2)CSNH_(2)` CONTAINS both N and S and hence GIVES red colour in Lassaigne's test. `NH_(2)CONH_(2)` does not contain Cl and hence does not give while ppt. Thus, `C_(6)H_(5)NHMe` contains N and hence gives blue colour while `o-C_(6)H_(4)(Cl)COOH` contains Cl and thus gives white ppt. Lassaigne's test. Hence, option (d) is correct.