Match the compounds in Column I with their characteristic test(s)/reaction(s) given in Column II. (p) Sodium fusion extract

Question

 Match the compounds in Column I with their characteristic test(s)/reaction(s) given in Column II.

Column I	Column II
	(p) Sodium fusion extract of the compound gives Prussian blue colour with FeSO4
	(q) Gives positive FeCl3 test
	(r) Gives white precipitate with AgNO3
	(s) Reacts with aldehydes to form the corresponding hydrazone derivative

Answer 1

Correct option A→r,s; B→p,q; C→p,q,r; D→p

Explanation:

Sodium fusion extract gives Prussian blue colour when nitrogen is present alongwith carbon.

Phenolic group and carboxylate give positive FeCl₃ test. White precipitate comes with Cl^-.

Hydrazone formation occurs effectively a.t pH ≈ 4.5. The reaction proceeds in that condition only when H⁺ concentration is merely sufficient to activate,

concentration raises sufficient molecule of hydrazone gets converted into hydrazonium ion which is not nucleophilic and reaction becomes impossible. Further low concentration of lf (in the case of hydrolysis of 2,4-dinitrophenyl hydrazonium bromide) is not.effective to proceed elimination (rate determining step).