Chemical Environmental Engineering

A. Acidity
B. Alkalinity
C. Hardness
D. Iron & zinc

A. Of clotting of blood
B. Of jamming of respiratory tract
C. It forms carboxyhemoglobin by combining with haemoglobin of blood, thereby making it
incapable of absorbing oxygen
D. It forms CO2 by combining with oxygen present in the blood

A. Mercury
B. Arsenic
C. Aluminium
D. Lead