Everyday Science MCQs

5120 MCQs  (Page 311 of 512)

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The yellow colour in photochemical smog is due to presence of__________________?
A. Dinitrogen oxide
B. Nitrogen dioxide
C. Chlorine gas
D. Chlorine dioxide
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Which of the following is not primary pollutant__________________?
A. So3
B. Co
C. No
D. H2so4
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Which of the following gases is the main cause of acid rain ?
A. Co
B. No2
C. Both a & b
D. None of the above
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Which of the following factors help to measure quallity of water ?
A. Do
B. Bod
C. Cod
D. All of the above
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A single chlorine free radical can destroy how many ozone molecules ?
A. 10
B. 100
C. 10000
D. 100000
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Newspaper can be recycled again and again how many times ?
A. 2
B. 3
C. 4
D. 5
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The main pollutant of leather tanneries in the waste water is____________________?
A. Chromium iii
B. Chromium iv
C. Chromium v
D. Chromium vi
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Which substance can be used for disinfecting water ?
A. Kmno4
B. Alums
C. Ozone
D. All
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Which one of the following makes the bulk of hydrospheres content ?
A. Oceans
B. Glaciers & icecaps
C. Fresh water lakes and ponds
D. All have equal distribution
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The percentage of suspended solid waste in raw water is removed by coagulation is__________________?
A. 60
B. 70
C. 80
D. 90
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Word of the Day
25 Jul
January
a preference or special liking for something; a bias in favour of something.
2021:00:00

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