The correct options are
B Known as King of chemical industry
C Used in the manufacture of paper, pharmaceuticals, fertilizers, etc
D A major component in acid rain
Sulphuric acid consist of 2 hydrogen atoms attached to a sulphate atom (SO2−4) not sulphite atom.
It is known as the king of chemical industry due to its immensive application in the manufacture of various products like paper, batteries, fertilizers, pharmaceuticals, dyes, pigments and so on.
Sulphuric acid is a major component of acid rain formed by the presence of oxides of sulphur mixed with the rain water.