StudentAidUnit 10: Environmental Chemistry — Mcqs
9th Class Chemistry · Unit 10: Environmental Chemistry
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1.Which gases are responsible for greenhouse effect?
2.Indicate the source of sulphur which is responsible for the presence of oxides of sulphur in the atmosphere.
3.Concentration of which gas in the atmosphere is decreased by photosynthesis in plants?
4.Which substance remains unaffected in the catalytic converter fixed in the exhaust of the automobiles?
5.People of which age groups are most affected by the air pollution?
6.In which area there is a greater possibility of acid rain?
7.Why is smog not felt in summer?
- a Because fog is not present in summer
- b Because due to heat of the Earth the smoke rises up
- c Because in summer smoke and fog cannot mix with each other
- d Because less fossil fuels are burnt in summer
8.Which catalyst is used in the catalytic converter fixed in the exhaust systems of automobiles?
9.Which components are essential for the formation of photochemical smog?
10.Which gases contribute towards the formation of acid rain?
Composition of Atmosphere
11.% age of oxygen gas by volume in dry air is:
12.99% of atmosphere consists of:
13.The envelope of different gases around the Earth is called:
14.The percentage by volume of nitrogen in dry air is:
Air Pollutants
15.Which one of these pollutants are not found in car exhaust fumes?
16.Carbon monoxide is harmful to us because:
17.The percentage of SO_2 released by the combustion of coal and petroleum products is:
- a 40%
- b 60%
- c 70%
- d 80%
18.Which is not a characteristic of SO_2?
19.How many % of marine mammals are at the risk of choking on plastic?
20.How many percentage of all available water use by humans?
21.Which gas is produced by the electrical lightning in air?
22.Which is not an air pollutant?
23.Which is not a poisonous gas?
24.Higher concentration of CO causes:
25.A pollutant is a waste material that pollutes:
26.Which factor determines the severity of a pollutant?
27.Which of the following is a poisonous gas?
28.Which gas is emitted due to volcanic eruption?
- a CO_2
- b SO_2
- c N_2
- d Both a & b
Acid Rains
29.Normally rain water is weakly acidic because of:
30.Buildings are being damaged by acid rain because it attacks:
31.The pH of normal rain water is:
Global Warming (Greenhouse Effect)
32.A group of gases that maintains temperature of atmosphere is:
33.The Earth's atmosphere is getting hotter because of:
34.Which one of the following is not a greenhouse effect?
35.Global warming causes rising of the sea level. The cause of global warming is:
36.Global warming is because of:
37.Which gas is responsible for warming the atmosphere?
38.Which gas in atmosphere acts as a glass wall of a green house?
39.Increased concentration of CO_2 in air, results:
40.Which type of pollutants are responsible for changing weather?
41.Fossil fuel means:
42.Forest fires and burning of wood emit:
43.How many tree are there in the world?
44.How many trees are cut down to make toilet paper every day?
45.How many tons of ice have lost since 1990?
46.How many tons of ice melts every year?
Strategies to Reduce Environmental Issues
47.Catalytic converters convert:
48.Which gas is also known as life gas for plants?
49.In the bacterial decay, the compounds of which element are emitted?