Which of the following will react with water?

$A$ compound $A$ has a molecular formula $C_2Cl_3OH$. It reduces Fehling's solution and on oxidation gives a monocarboxylic acid $(B)$. $A$ is obtained by the action of chlorine on ethyl alcohol. $A$ is:

Give the major organic product of the following reaction.

$A$ primary alcohol was reacted with pyridinium chlorochromate $(PCC)$,which resulted in a product $P$. The product $P$ on treatment with ammoniacal silver nitrate solution produces:

What will be $X$ and $Y$ in the following reaction?

The reaction of hydrazine $(NH_2NH_2)$ with aldehydes and ketones yields a compound with the general structure: