The common pollutant generated in chlor-alkali industry and battery manufacture is ___________________?

A. Nitric acid
B. Sulphuric acid
C. Chlor alkali
D. Iron & steel

A. 0.1 to 1
B. 3 to 6
C. 10 to 15
D. 15 to 20

A. Air binding
B. Shrinkage of filtering media
C. Mud balls
D. Expansion of filtering media

A. Undesirable plants growth
B. Depletion of oxygen
C. Fire hazards
D. Explosion hazards

A. Embrittlement & decrease of folding resistance of paper
B. Cracking of rubber products
C. Fading of dye on textiles
D. Damage of electrical insulator on high tension power line

A. 0.1
B. 1
C. 5
D. 25