If the general formula of oxime and semicarbazone is $C=N-Z$,what is '$Z$' in oxime $(I)$ and semicarbazone $(II)$?

The product $A$ in the following reaction is:

Which of the following does not turn Schiff's reagent to pink?

Which one of the following on treatment with $50\%$ aqueous sodium hydroxide yields the corresponding alcohol and acid?

When acetaldehyde is reacted with $LiAlH_4$,what is the product formed?

When liquid $A$ is treated with a freshly prepared ammoniacal silver nitrate solution,it gives a bright silver mirror. The liquid forms a white crystalline solid on treatment with sodium hydrogensulphite. Liquid $B$ also forms a white crystalline solid with sodium hydrogensulphite but it does not give a test with ammoniacal silver nitrate. Which of the two liquids is an aldehyde? Write the chemical equations of these reactions also.