Which of the following is not a heavy industry ?
Which of the following is not a heavy industry ?
A. iron
B. fertilizer
C. paper
D. none
Environmental Chemistry
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Pollutants have adverse effect over_________________?
Pollutants have adverse effect over_________________?A. Biosphere
B. Ecosystem
C. Both a & b
D. Hydrosphere -
The main product of bacterial action is_________________?
The main product of bacterial action is_________________?A. Nox
B. NO2
C. N2O3
D. NO -
The percentage of suspended solid waste in raw water is removed by coagulation is__________________?
The percentage of suspended solid waste in raw water is removed by coagulation is__________________?A. 60
B. 70
C. 80
D. 90 -
Which one of the following makes the bulk of hydrospheres content ?
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 -
Which substance can be used for disinfecting water ?
Which substance can be used for disinfecting water ?A. KMnO4
B. Alums
C. Ozone
D. All -
The main pollutant of leather tanneries in the waste water is____________________?
The main pollutant of leather tanneries in the waste water is____________________?A. chromium III
B. chromium IV
C. chromium V
D. chromium VI -
Newspaper can be recycled again and again how many times ?
Newspaper can be recycled again and again how many times ?A. 2
B. 3
C. 4
D. 5 -
In the purification of portable water the coagulant used is_________________?
In the purification of portable water the coagulant used is_________________?A. alum
B. nickel sulphate
C. copper sulphate
D. barium sulphate -
Which statement is wrong ?
Which statement is wrong ?A. the amount of ozone layer is greater in the region close to the equator
B. ozone acts as filter for UV radiations
C. in the equatorial region it acts as pollutant
D. CFCs play effective role in removing O3 in the stratosphere