NOx
Hg
SO₂
F
✅ The correct answer is option C.
Chemical Engineering MCQs
The concentration of water vapour in troposphere, which depends upon the altitude & temperature varies in the range of zero to __________ percent.
1
4
8
12
✅ The correct answer is option B.
Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by
Quenching of hot coke
Discharging in the river stream
Filtration and recycling for cooling coke oven gas
None of these
✅ The correct answer is option A.
Presence of bacteria in potable (drinking) water causes
Turbidity
Disease
Bad odour
Bad taste & colour
✅ The correct answer is option B.
Higher concentration of nitrogen dioxide in atmospheric air causes
Cancer
Bronchitis
Asphyxiation
Corrosion
✅ The correct answer is option B.
Which of the following is not a secondary air pollutant?
Ozone
Photochemical smog
Sulphur dioxide
All of the above
✅ The correct answer is option C.
The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
Dilute H₂SO₄
Oleum
Ultraviolet light
None of these
✅ The correct answer is option B.
Sulphur removal by heating of pyrite ore in presence of air is called its
Reduction
Roasting
Calcination
Smelting
✅ The correct answer is option B.
Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of
Calcium sulphate
Sodium chloride
Sodium sulphate
Magnesium chloride
✅ The correct answer is option B.
Which of the following processes is absent in glass manufacturing process?
Sintering
Annealing
Shaping or forming
Melting
✅ The correct answer is option A.