What was added in 1987 as a pollutant to The Air (Prevention and Control of Pollution) Act, [originally passed in 1981] :
1. radioactive wastes
3. ground level ozone
According to CPCB, what particulate size is most harmful to humans:
1. more than 10 micrometers
2. between 5 to 10 micrometers
3. between 2.5 to 5 micrometers
4. less than 2.5 micrometers
The most effective device to remove particulate matter from polluted air is:
1. electrostatic precipitator
2. cyclonic separator
3. trajectory separator
A catalytic converter :
1. reduces unburnt hydrocarbon in auto emissions
2. converts NOx to nitrogen
3. reduces lead in the exhaust
4. converts carbon dioxide to carbon monoxide
The group most profoundly affected by global warming normally is :-
The concentration of ozone in stratosphere is normally lowest during the period:-
1. February - April
2. May - July
3. July - October
4. November - January
Which of the following radiatively active gases contributes the least to global warming?
What is the percentage of photosynthetic active radiation [PAR] in the incident solar radiation?
1. 100 %
Which of the following commits industrialized nations to reduce greenhouse gas emissions ?
1. Montreal protocol
2. Kyoto protocal
3. UNECD earth summit
4. Alma Atta conference
Catalytic converters on motor vehicle exhausts are a way of trying to reduce the carbon monoxide and nitrogen oxide emissions. Which of the following are correct?
I. The catalyst used is either platinum or a combination of platinum and rhodium.
II. The platinum catalyses the reaction of cO and NO to form CO2 and N2 gas
III. The rhodium catalyses the reaction of unburnt hydrocarbon and O2 to produce CO2 and H20 vapor
IV. The reduction of NO to N2 must proceed more quickly than the oxidation of CO to CO2 or else all the CO will be oxidized to carbon dioxide before it can be used to reduce the nitric oxide
V. Motor vehicles can only use catalytic converters if they use unleaded petrol since the lead in petrol renders the catalyst inactive.
1. I, II, III
2. IV, V
3. I, III, IV
4. III, IV, V