The product of the reaction is

An aromatic compound $A$ (Molecular formula $C_{8}H_{8}O$) gives a positive $2,4-DNP$ test. It gives a yellow precipitate of compound $B$ on treatment with iodine and sodium hydroxide solution. Compound $A$ does not give Tollen's or Fehling's test. On drastic oxidation with potassium permanganate,it forms a carboxylic acid $C$ (Molecular formula $C_{7}H_{6}O_{2}$),which is also formed along with the yellow compound in the above reaction. Identify $A, B$ and $C$ and write all the reactions involved.

Identify the reagents $P$ and $Q$ in the following reaction sequence:

The reaction of $CH_3CH_2CHO$ with $PCl_5$ yields a product. Identify the type of dihalide formed.

Which of the following compounds can undergo the haloform reaction?

The reagent used in the Wolff-Kishner reduction is