What is the product obtained when salicylic acid is heated with sodalime?

The major product of the following reaction is

An aromatic compound $X$ when heated with $Zn$ powder gives benzoic acid,but when heated with soda lime,it gives phenol. Identify the compound $X$.

What will be the product $X$ in the following reaction?

What is the correct order of acidity for the following compounds?

Reaction of phenol with chloroform in the presence of dilute sodium hydroxide finally introduces which one of the following functional groups?