StudentAidUnit 14: Unit 14: Atmosphere — Mcqs
11th Class Chemistry · Unit 14: Unit 14: Atmosphere
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1.Which gas causes yellow color in photochemical smog?
2.The depletion of Ozone in stratosphere region is mainly due to the reaction of O3 with:
3.Which particulate matter size is considered the most harmful to human health?
4.Which of the following is a natural factor that can improve air quality?
5.What is a common human activity that led to increased level of carbon monoxide in the atmosphere?
6.Chlorofluorocarbons (CFCs) have been primarily used in:
7.What are the primary chemical processes that removes carbon dioxide from the atmosphere?
8.An AQI value between 51 and 100 typically indicates which level of air quality?
9.Acid rain is primarily caused by the release of which of the following gases into the atmosphere?
10.In the presence of sunlight and nitrogen oxides (NOx), VOCs can contribute to the formation of:
11.Primary pollutants like nitrogen oxides (NOx) and volatile organic compounds (VOCs) react in the presence of sunlight to form a key component of photochemical smog, which is a:
Layers of The Atmosphere
12.Which layer of the atmosphere contains most of the Earth's weather phenomena?
13.A key component that distinguishes photochemical smog from industrial smog is the presence of:
14.Percentage of oxygen in atmosphere:
15.Weather events occur in which layer of atmosphere:
16.Temperature increases with altitude in which of the following layers?
Composition & Structure of The Atmosphere
17.Which of the following is a trace gas but important for greenhouse effect?
18.Water vapour in the atmosphere is important because it:
Sources & Types of Air Pollutants
19.Primary pollutants are:
20.Which of the following limits emission of particulate matter in air?
- a Scrubbers
- b Catalytic converter
- c Diesel particulate filter
- d None of these
21.Which particulate matter is considered to be most harmful particulate matter?
22.Which of the following is a heavy metal?
23.Dichlorobiphenyl tri-chloroethane (DDT) is used as:
24.How forests contribute to lowering the temperature of earth?
25.Which is point source of pollution?
26.Effects of deforestation include:
27.Which of the following is carcinogenic?
28.Ash from volcanic eruption is:
29.Which of the following is a secondary pollutant?
30.Vehicular exhaust mainly contributes to which pollutants?
31.Which is considered a natural source of air pollution?
Oxides of Carbon (CO & CO2)
32.Carbon monoxide (CO) is dangerous because it:
33.Major human source of CO2 increase in atmosphere is:
34.Which statement about carbon dioxide is correct?
35.Incomplete combustion of carbon-based fuels tends to form:
Oxides of Nitrogen (NOx)
36.Major source of NOx in the atmosphere is:
37.NOx in the atmosphere contributes to:
38.Which reaction is important in forming nitric acid (HNO3) in the atmosphere?
39.How do NOx emissions affect human health primarily?
Ozone
40.The "good" ozone that protects life from UV radiation is located in the:
41.Which of the following causes ozone depletion?
- a Oxides of nitrogen
- b Oxides of sulfur
- c Hydrocarbons
- d None of these
42.Low altitude ozone is toxic above which concentration:
- a At low concentration
- b 100 ppm
- c 10ppm
- d 20ppm
43.The chemical specie responsible for ozone depletion by chlorofluorocarbons is:
44.Ground-level ozone (bad ozone) is mainly formed from:
45.Which substance was primarily responsible for stratospheric ozone depletion?
46.Exposure to high levels of ground-level ozone causes:
47.Which statement is true about stratospheric ozone and temperature?
Green-House
48.Which gas is the most important long-lived anthropogenic greenhouse gas by concentration?
49.Which of the following has the highest global warming potential per molecule but is present in much smaller quantities?
50.Which is NOT considered a greenhouse gas?
51.Which of the following is not a green-house gas?
52.Greenhouse gases cause global warming by:
Acid Rain & Its Effects
53.Acid rain mainly results from atmospheric deposition of:
54.Which of the following is an environmental effect of acid rain?
55.How does acid rain damage stone monuments made of limestone?
Smog
56.Which smog type is associated with cold, stagnant air and coal/soot combustion (classic London smog)?
57.Photochemical smog is characterized by high daytime concentrations of:
Air quality indices & monitoring
58.For an air quality index termed hazardous the colour is:
59.Which of the following would NOT improve a city's AQI in the short term?
60.Which of the following lowers the air quality?
61.Which range of AQI is considered hazardous?
Strategies of Reduce Air Pollution
62.Catalyst used in selective catalytic converter include:
63.Which of the following is used in diesel engines to restrict emission of harmful gases?
- a selective catalytic converter
- b catalytic converter
- c scrubbers
- d diesel particulate filter