A. Alum
B. Bleaching powder
C. Activated carbon
D. Copper sulphate
A. Nothing but black smoke
B. A combination of smoke and fog
C. A liquid particle resulting from vapor condensation
D. A solid particle e.g. fly-ash
A. Phenol and cyanide
B. Chlorine
C. Alkalis
D. Suspended solids
A. Foaming from boilers
B. Its dissolved oxygen content
C. Its silica content
D. Caustic embrittlement
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. Nitric acid
B. Sulphuric acid
C. Chlor alkali
D. Iron & steel
A. Bacterial stability factor
B. Relative stability
C. Biological oxygen demand (BOD)
D. Oxygen ion concentration