Acid present in acid rain may be__________________?
A. H2SO4 B. HNO3 C. both A and B D. none
Chemistry MCQs
Which of the following is not a condition for the formation of smog ?
A. sufficient NO B. sunlight C. less movement of air D. winds
In which of the following layer of atmosphere there is more thickness of ozone layer ?
A. troposphere B. stratosphere C. mesosphere D. photosphere
Which of the following air pollutants is more dangerous for ozone layer ?
A. CFC B. CO2 C. CO D. Oxides of nitrogen
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
In the purification of portable water the coagulant used is_________________?
A. alum B. nickel sulphate C. copper sulphate D. barium sulphate
Newspaper can be recycled again and again how many times ?
A. 2 B. 3 C. 4 D. 5
The main pollutant of leather tanneries in the waste water is____________________?
A. chromium III B. chromium IV C. chromium V D. chromium VI
Which substance can be used for disinfecting water ?
A. KMnO4 B. Alums C. Ozone D. All
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