R4RIN – MCQs, Mock Tests | CBES Board Class 10 ENVIRONMENTAL CHEMISTRY I ATMOSPHERE MCQS

Which of the following makes up most of the air?

1. nitrogen
2. oxygen
3. carbon dioxide
4. helium

✅ Correct Answer: 1

Which of the following is true about nitric oxide?

1. it is colorless
2. it has an irritating odor
3. it is not toxic
4. it is not harmful

✅ Correct Answer: 1

Presence of which of the following can be felt near the photocopier television set microwave oven etc?

1. chlorofluorocarbons (chlorofluorocarbons (CFCs))
2. methane
3. ozone
4. lead compounds

✅ Correct Answer: 3

The extension of troposphere above the Earths surface is

1. 12 km
2. 50 km
3. 80 km
4. 70 km

✅ Correct Answer: 1

The energy of sunlight is converted into heat by

1. oxygen only
2. nitrogen only
3. hydrogen
4. oxygen and nitrogen

✅ Correct Answer: 4

What is the term used for the area in which the amount of ozone has been reduced?

1. black hole
2. worm hole
3. ozone hole
4. red hole

✅ Correct Answer: 3

Height of mesosphere is

1. 0-12 Km
2. 12-50 Km
3. 50-80 Km
4. above 80 Km

✅ Correct Answer: 3

A waste treatment process in which solid waste is burned at high temperature is called

1. combustion
2. incineration
3. oxidation
4. reduction

✅ Correct Answer: 2

Which of the following is the first layer of atmosphere as one moves upwards from the Earths surface?

1. troposphere
2. stratosphere
3. mesosphere
4. thermosphere

✅ Correct Answer: 1

Which of the following causes global warming but is not an air pollutant?

1. carbon dioxide
2. carbon monoxide
3. sulphur dioxide
4. oxides of nitrogen

✅ Correct Answer: 1

What is the color of nitric oxide?

1. colorless
2. pink
3. brown
4. reddish brown

✅ Correct Answer: 1

What is the meaning of the term Strato?

1. layer
2. top
3. changing
4. turning

✅ Correct Answer: 1

What is the source of chlorofluorocarbons?

1. aerosol sprays foams
2. exhaust fumes of motor vehicles
3. incomplete burning of wood
4. none of above

✅ Correct Answer: 1

Which layer of atmosphere is first exposed to sunlight?

1. troposphere
2. stratosphere
3. mesosphere
4. thermosphere

✅ Correct Answer: 4

Which of the following is not true about ozone?

1. it is light blue in colour
2. it has unpleasant odor
3. it is harmful
4. it is not a pollutant

✅ Correct Answer: 4

Which of the following is the layer of atmosphere in which we live?

1. troposphere
2. stratosphere
3. mesosphere
4. thermosphere

✅ Correct Answer: 1

Which of the following is not true about nitric oxide?

1. it is colorless
2. it is odourless
3. it is toxic
4. it is not harmful

✅ Correct Answer: 4

Which of the following can cause eye irritation in the troposphere?

1. chlorofluorocarbons (CFCs)
2. methane
3. ozone
4. lead compounds

✅ Correct Answer: 3

What is the color of ozone?

1. dark blue
2. red
3. pink
4. light blue

✅ Correct Answer: 4

Sulphuric acid eats away metals to form

1. water soluble salts only
2. hydrogen only
3. oxygen
4. water soluble salts and hydrogen

✅ Correct Answer: 4

Which of the following saves us from the harmful effects of incoming ultraviolet radiation from the sun?

1. troposphere
2. mesosphere
3. thermosphere
4. ozone

✅ Correct Answer: 4

Brilliant light displays called aurora borealis occur in

1. troposphere
2. stratosphere
3. exosphere
4. ionosphere

✅ Correct Answer: 4

Which of the following contains the maximum amount of ozone?

1. troposphere
2. stratosphere
3. mesosphere
4. thermosphere

✅ Correct Answer: 2

Acid rain may have pH as low as

1. 11
2. 21
3. 31
4. 41

✅ Correct Answer: 2

What is the source of oxides of nitrogen?

1. Powerstations and industries using fossil fuels only
2. exhaust fumes of motor vehicles only
3. incomplete burning of wood
4. Powerstations & industries using fossil fuels and exhaust fumes of motor vehicles

✅ Correct Answer: 4

Which of the following is closest to the Earths surface?

1. troposphere
2. stratosphere
3. mesosphere
4. thermosphere

✅ Correct Answer: 1

Percentage of krypton in the air is

1. 4ppm
2. 3ppm
3. 2ppm
4. 1ppm

✅ Correct Answer: 4

What is the extension of the ionosphere above the surface of Earth? none of above

1. 80 km to 400 km
2. 0 km to 12 km
3. 400 km to thousands of kilometer
4. none of above

✅ Correct Answer: 1

What happens to the rates of ozone formation and destruction in the absence of outside intervention?

1. rate of ozone formation is faster
2. rate of ozone destruction is faster
3. they are equal
4. none of above

✅ Correct Answer: 3

Amount of ozone contained by stratosphere is

1. 10ppm
2. 20ppm
3. 30ppm
4. 40ppm

✅ Correct Answer: 1

Which of the following is a poisonous gas?

1. carbon dioxide
2. carbon monoxide
3. nitrogen
4. nitrogen dioxide

✅ Correct Answer: 2

What is the source of sulfur dioxide?

1. Powerstations and industries using fossil fuels
2. exhaust fumes of motor vehicles
3. incomplete burning of wood
4. none of above

✅ Correct Answer: 1

The thermosphere is hot up to

1. 1800 �C
2. 800 �C
3. 1000 �C
4. 50 �C

✅ Correct Answer: 1

What is the extension of the exosphere above the surface of Earth?

1. 80 km to 400 km
2. 0 km to 12 km
3. 400 km to thousands of kilometer
4. none of above

✅ Correct Answer: 3

Maximum temperature of the troposphere is

1. 17 �C
2. ?55 �C
3. ?5 �C
4. 1800 �C

✅ Correct Answer: 1

Which of the following is not an air pollutant?

1. carbon dioxide
2. carbon monoxide
3. sulphur dioxide
4. oxides of nitrogen

✅ Correct Answer: 1

Which of the following is not an air pollutant?

1. carbon dioxide
2. carbon monoxide
3. sulphur dioxide
4. oxides of nitrogen

✅ Correct Answer: 1

Which of the following protects Earths surface from being hit by most meteoroids?

1. troposphere
2. stratosphere
3. mesosphere
4. thermosphere

✅ Correct Answer: 3

What is meant by the term thermo?

1. outer
2. top
3. turning
4. heat

✅ Correct Answer: 4

Conditions are most variable in

1. troposphere
2. stratosphere
3. mesosphere
4. thermosphere

✅ Correct Answer: 1

Which of the following is not true about incineration?

1. it consumes all combustible materials
2. it is not a clean process
3. it does not produce air pollution
4. it generates odor

✅ Correct Answer: 3

Most of the mass of the atmosphere is contained in

1. troposphere
2. stratosphere
3. mesosphere
4. thermosphere

✅ Correct Answer: 1

Which of the following is the outermost layer of the atmosphere?

1. troposphere
2. stratosphere
3. mesosphere
4. thermosphere

✅ Correct Answer: 4

In which of the following regions do aircraft fly?

1. troposphere
2. stratosphere
3. mesosphere
4. thermosphere

✅ Correct Answer: 1

Brilliant light displays occurring in the northern hemisphere due to particles from the sun that enter ionosphere are called

1. stars
2. rainbows
3. aurora borealis
4. none of above

✅ Correct Answer: 3

Which layer is located above the stratosphere

1. mesosphere
2. troposphere
3. ozone
4. none of above

✅ Correct Answer: 1