Predict the product $C$ in the following series of reactions:

An organic compound with the molecular formula $C_9H_{10}O$ forms a $2,4-DNP$ derivative,reduces Tollens' reagent,and undergoes the Cannizzaro reaction. On vigorous oxidation,it gives $1,2-benzenedicarboxylic$ acid. Identify the compound.

Identify the product $Y$ in the following reaction sequence:
$CH_3CHO + CH_3MgI$ $\xrightarrow{\quad} X$ $\xrightarrow{H_2O/H^+} Y$

Which of the following reactions will give $\alpha$-hydroxy acid as a product?

Which of the following statements regarding chemical properties of acetophenone are wrong?
$(1)$ It is reduced to methyl phenyl carbinol by sodium and ethanol
$(2)$ It is oxidised to benzoic acid with acidified $KMnO_4$
$(3)$ It does not undergo electrophilic substitution like nitration at meta position
$(4)$ It does not undergo iodoform reaction with iodine and alkali

Which of the following does not form a stable hydrate on addition of $H_2O$?