When an electron attracting group (like $ -NO_2, -Cl$ ) is attached to the phenol ring, it stabilises the negative charge on the oxygen of phenoxide ion. Due to this reason acidic character of phenol increases. But when an electron donating group (like $-CH_3$ ) is attached to the phenol ring, it destabilises the ring and hence , acidic characte r of phenol decreases . Thus, the correct order of acidic character is
$ p$ -nitrophenol $> p$ -chlorophenol $>$ phenol $> o$ -cresol
Alcohol is formed when a saturated carbon atom bonds to a hydroxyl (-OH) group. It is an organic compound that contains a hydroxyl functional group attached to a carbon atom.
Phenol is formed when the -OH group replaces the hydrogen atom in benzene. It is an organic compound in which a hydroxyl group directly attaches to an aromatic hydrocarbon.
Ether is formed when oxygen atom bonds to two alkyl or aryl groups. It is an organic compound that has an oxygen atom that is connected to two aryl and alkyl groups.
