What will be the final product $B$ in the following reaction?

The compound formed as a result of potassium permanganate oxidation of ethylbenzene is

Which reaction is incorrectly written?

Which one of the following reactions will not yield propionic acid?

Grignard reagent $RMgBr$ $(P)$ reacts with water and forms a gas $(Q)$. One gram of $Q$ occupies $1.4 \ dm^3$ at $STP$. $(P)$ on reaction with dry ice in dry ether followed by $H_3O^{+}$ forms a compound $(Z)$. $0.1 \ mole$ of $(Z)$ will weigh . . . . . . $g$. (Nearest integer)

Hydrolysis of $CH_3CH_2NO_2$ with $85\%$ $H_2SO_4$ gives