The compound that does $NOT$ liberate $CO_2$ on treatment with aqueous sodium bicarbonate solution is:

The major product formed in the following reaction is:

The correct order for acidity of the following hydroxyl compounds is:
$A. CH_3OH$
$B. (CH_3)_3COH$
$C. C_6H_5OH$
$D. p-CH_3OC_6H_4OH$
$E. p-O_2NC_6H_4OH$
Choose the correct answer from the options given below:

Explain why $ortho$-nitrophenol is more acidic than $ortho$-methoxyphenol?

Heating phthalic anhydride and concentrated sulfuric acid with which of the following yields phenolphthalein?

$X + Y \xrightarrow{H^{+}} \text{Aspirin} + CH_3COOH$. Identify $X$ and $Y$ from the following: