Give the answer for Lassigne test. (i) If nitrogen and sulphur both present than which observation is observed? (ii) If bromine is present then? (iii) In Lassigne extract by adding CH_(3)COOH and lead acetate black ppts are not obtained? What is inducate? (iv) What is the reason to added FeSO_(4) in Lassigne extract? (v) Why the prussion blue colour is oberved? (vi) Lassigne extract gives violet colour sodium nitroprusside?

Give the answer for Lassigne test. (i) If nitrogen and sulphur both p

1.	Give the answer for Lassigne test. (i) If nitrogen and sulphur both present than which observation is observed? (ii) If bromine is present then? (iii) In Lassigne extract by adding CH_(3)COOH and lead acetate black ppts are not obtained? What is inducate? (iv) What is the reason to added FeSO_(4) in Lassigne extract? (v) Why the prussion blue colour is oberved? (vi) Lassigne extract gives violet colour sodium nitroprusside?
Answer» Solution :(i) RED COLOUR is obtained due to `[Fe(SCN)]^(2+)` (ii) By adding `AgNO_(3)` yellow ppt will FORM (iii) Sulphur is not present (IV) To convert `Fe^(2+) " to " Fe^(3+)` by OXIDATION (v) Due to formation of `Fe_(4)[Fe(CN)_(6)]_(3)` (vi) Sulphur is present in compound