Which reaction is used to make salicylic acid from phenol?

Phenol and benzoic acid are distinguished by

Arrange the following compounds in increasing order of $C-OH$ bond length: methanol,phenol,$p-$ethoxyphenol.

When phenol is treated with chloroform in the presence of sodium hydroxide,followed by hydrolysis in the presence of an acid,the product formed is:

Which of the following compounds has the least $pK_a$ value?

Identify the product $X$ in the following reaction: $C_6H_5MgBr + C_6H_5OH \rightarrow X$