A. Active carbon
B. Silica gel
C. Bog iron (iron oxide)
D. Pulverised limestone
Related Mcqs:
- Which of the following is an adsorbent used for the removal of SO2 from gas/air ?
A. Bog iron
B. Limestone powder or alkalised alumina
C. Silica gel
D. Active carbon - Tolerable limit of nitrogen oxides in air is _____________ ppm?
A. 0.1
B. 1
C. 5
D. 25 - Nitrogen oxides (NOx) is not produced in the ______________ industry?
A. Nitric acid making
B. Nitrogenous fertiliser
C. Detergent
D. Any of these - Which is the most efficient dust removal equipment for removal of submicronic dust particles from blast furnace gas ?
A. Packed scrubber
B. Gravity settling chamber
C. Electrostatic precipitator
D. Hydrocyclone - Most efficient and suitable dust removal equipment for removal of fly-ash from flue gas in a thermal power plant is the__________________?
A. Gravity settling chamber
B. Cyclone separator
C. Electrostatic precipitator
D. Bag filter - Ethanolamine is an absorbent used for the removal of _____________ from air/gas?
A. HF
B. SO2
C. H2S
D. Both B. & C. - Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N2 in contaminated air at which it acts as a natural asphyxiate is ≥ _____________ percent?
A. 84
B. 88
C. 80
D. 92 - Higher concentration of nitrogen dioxide in atmospheric air causes___________________?
A. Cancer
B. Bronchitis
C. Asphyxiation
D. Corrosion - TLV of ammonia, nitrogen dioxide and phenol vapor in air is ______________ ppm ?
A. 5
B. 100
C. 1000
D. 2000 - Methyl isocyanate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of ______________ toxic gas?
A. Moderately
B. Highly
C. Extremely
D. Very extremely
