Which of the following on reaction with ammoniacal silver nitrate forms a silver precipitate?

Write down functional isomers of a carbonyl compound with molecular formula $C_3H_6O$. Which isomer will react faster with $HCN$ and why? Explain the mechanism of the reaction also. Will the reaction lead to the completion with the conversion of whole reactant into product at reaction conditions? If a strong acid is added to the reaction mixture what will be the effect on concentration of the product and why?

Benzaldehyde and acetaldehyde can be differentiated by

Which of the following cannot be obtained by the reduction of an aldehyde or a ketone using $NaBH_4$ or $LiAlH_4$?

Which compound can reduce Fehling reagent?

$A$ and $B$ are isomers; Isomer $B$ is