Q. Consider the following statements about scrubber I. It is used to remove gases like sulphur dioxide from industrial exhaust II. In a scrubber, the exhaust is passed through a spray of water or lime III. Water dissolves gases and lime reacts with sulphur dioxide to form a precipitate of calcium sulphate and sulphide Which of the statements given above are correct?
A) I and II
B) I and III
C) II and III
D) I, II and III
Explanation
A scrubber can remove gases like sulphur dioxide. In wet scrubber, a fine spray of water or alkaline fluid like lime is allowed to fall over exhaust emissions. Water dissolves gases. The particles also become heavy and fall down. Lime reacts with sulphur dioxide to produce a precipitate of calcium sulphate or calcium sulphide is used to remove soluble gases and particles
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.