p-Nitrotoluene on further nitration gives

In which of the following reaction t–butylbenzene is formed

How many transition states are formed during the following reaction?

Number of hydrocarbons formed when C2H5Br and CH3–CH2–CH2–Br are treated with Na in the presence of

Identify ‘Z’ in the following reaction series,CH3CH2CH2Br (X) (Y) (Z)

CH≡C–COOH product (A), A is