A. Bog iron
B. Limestone powder or alkalised alumina
C. Silica gel
D. Active carbon
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Related Mcqs:
- Which of the following is an adsorbent for removal of nitrogen oxides from gas/air ?
- A. Active carbon B. Silica gel C. Bog iron (iron oxide) D. Pulverised limestone...
- 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....
- When the concentration of SO2 in air is greater than ______________ ppm, it gives a pungent smell?
- A. 0.01 B. 0.1 C. 1 D. 4...
- _____________ plant emits large amount of SO2 as an air pollutant?
- A. Nitric acid B. Sulphuric acid C. Chlor alkali D. Iron & steel...
- Death may occur, when SO2 concentration in atmospheric air exceeds ______________ ppm?
- A. 20 B. 100 C. 400 D. 200...
- 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...
- Which of the following plants does not emit appreciable amount of SO2 in atmosphere ?
- A. Thermal power plant B. Petroleum refinery C. Nitric acid plant D. Sulphuric acid plant...
- Exposure to SO2 containing chimney gases results in the__________________?
- A. Reduction in strength of leather & cloth B. Acceleration of corrosion rates of metals C. Increased drying & hardening time of paints D. All A., B. and C....
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