Q. The gas which is produced by Paddy fields and is involved in global warming is -
1) Chlorine
2) Methane
3) Carbon dioxide
4) Hydrogen sulphide
Q. Which of the following is not a Nitrogen fixing organism ?
1) Nostoc
2) Anabaena
3) Azotobacter
4) Mycorrhiza
Q. Which of the following is an example of a non-cellulosic fibre ?
1) Jute
2) Rayon
3) Nylon
4) Linen
Q. The total amount of green-house gases produced, to directly and indirectly support human activities, is referred to as -
1) Carbon sequestration
2) Carbon dioxide index
3) Carbon capture
4) Carbon footprint
Q. Which among the following environmental pollutants are responsible for ‘acid rain’ ?
1) Nitrous oxide and sulphur dioxide
2) Carbon dioxide and Nitrogen
3) Ozone and Carbon dioxide
4) Carbon monoxide and Carbon dioxide
Q. Which among the following is the secondary pollutant ?
1) Smog
2) Carbon dioxide
3) Carbon monooxide
4) Fly ash
Q. A powerful eye irritant in the smoke is -
1) Ozone
2) Sulphur dioxide
3) Carbon dioxide
4) Peroxylacetyle nitrate
Q. Ultra-violet radiation from sun light causes the reaction that produce which of the following ?
1) CO
2) SO2
3) O3
4) Fluorides
Q. Methane is emitted from which of the following ?
1) Paddy fields only
2) Termitary only
3) Both (1) and (2)
4) None of the above
Q. Which of the following elements is a semi-conductor ?
1) Aluminium
2) Silicon
3) Silver
4) Lead
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