The reaction of phenol with chloroform in the presence of dilute sodium hydroxide finally introduces a functional group X. The X is:

1. -CH₂Cl

2. -COOH

3. -CHCl₂

4. -CHO

The most acidic compound among the following is:

1.		2.
3.		4.

Among the following four compounds

The acidity order is:

1. c > d > a > b

2. a > d > c > b

3. b > a > c > d

4. d > c > a > b

Phenol in a set of reactions (as captured below) yielded a product Z.

\(\text{Phenol}\ \xrightarrow{\text{Zn Dust}}\ \text{X}\ \xrightarrow[\text{Anhy. }{AlCl_3}]{CH_3Cl}\ Y\)
\( Y\ \xrightarrow[KMnO_4]{\text{Alkaline}}\ Z\)
The structure of the product Z would be:

1. Toluene

2. Benzaldehyde

3. Benzoic acid

4. Benzene