In the given reaction: $[X] +$ Acetic anhydride $\rightarrow$ Aspirin,$[X]$ will be:

When benzene sulfonic acid and $p-$nitrophenol are treated with $NaHCO_3$,the gases released respectively are

The electrophile involved in the reaction shown below is:
$C_6H_5OH + CHCl_3 + NaOH \rightarrow C_6H_4(ONa)CHO$

What are $X$ and $Y$ respectively in the following reaction sequence?
$C_6H_5N_2^+X^-$ $\xrightarrow{C_2H_5OH} X$ $\xrightarrow[\text{anhy. } AlCl_3]{CO, HCl} Y$

Give the reaction for heating of phenol with zinc powder.

In the reaction sequence,phenol reacts with $HNO_2$ to form $X$,which then reacts with phenol in the presence of $H_2SO_4$ to form $Y$. Identify the major products $X$ and $Y$.