- (A) Dilution with inert material
- (B) Discharging to atmosphere through tall stacks after dilution
- (C) Disposing off in rivers & oceans
- (D) Filling in steel crates and shooting it off out of earth’s gravity
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- (A) Catalytic conversion
- (B) Green house effect
- (C) Global warming
- (D) Both
- (A) Active carbon
- (B) Silica gel
- (C) Bog iron (iron oxide)
- (D) Pulverised limestone
- (A) CO2
- (B) H2
- (C) SO3
- (D) N2
- (A) Mufflers (silencers)
- (B) Acoustic absorbent
- (C) Lagging of noisy duct
- (D) None of these
- (A) All the nitrogenous fertilisers are not soluble in water
- (B) A straight fertiliser contains only one nutrient
- (C) Calcium cyanamide is used as weed killer in onion fields
- (D) The phosphorous nutrient makes the plant stem stronger and increases its branches
- (A) Turbidity
- (B) Odour
- (C) Hardness
- (D) Bacteria
- (A) EDTA
- (B) Electometric
- (C) Total count
- (D) Presumptive
- (A) Dissolved solid
- (B) Suspended solid
- (C) Oil & fatty
- (D) Gritty & inorganic
- (A) CO2
- (B) SO2
- (C) Hydrocarbons
- (D) CFC (chloro fluoro carbon)
