Which compound given below does not form red precipitate with ammobniacal solution of `Cu (II)` tartarate?

Which compound does not give precipitate with ammonical silver nitrate solution ?

Aldehydes form red precipitate with Fehling solution of………

Which of the following does not form precipitate with AgNO_3 ?

Match the compounds (A) ethanol, (B) methane, (C) ethanoic acid, (D) ethyne and (E) ethene with the descriptions given below: It gives a red precipitate with ammoniacal solution of copper (I) chloride.

Why does compound (A) given below not form an oxime?