The reaction which involves dichlorocarbene as an electrophile is,

What is the product of the following reaction?

The reaction is given as: $X \xrightarrow{Y} \text{Benzoquinone}$. Identify $X$ and $Y$ in the above reaction.

Suppose the following reaction:
Benzene $(C_6H_6) + CH_3-CH=CH_2$ $\xrightarrow{H^{\oplus}} A$ $\xrightarrow{O_2} B$ $\xrightarrow{H^{\oplus} / \Delta} C + CH_3-CO-CH_3$
The structure of intermediate compound $B$ will be

Which of the following compounds is most readily nitrated?

Identify $A$ in the following reaction: $A + \text{Acetic anhydride} \xrightarrow{H^{+}} \text{Aspirin} + \text{Acetic acid}$