Electric process as compared to wet process (for the manufacture of phosphoric acid)

ANS:B - is used less frequently.

Electric process for the manufacture of phosphoric acid is used less frequently compared to the wet process. The wet process is the dominant method for phosphoric acid production due to its lower cost and versatility. In the wet process, phosphate rock is reacted with sulfuric acid to produce phosphoric acid, while in the electric process, phosphate rock is reacted with electric furnace coke and silica in an electric furnace. So, the correct option is: is used less frequently.