R4RIN – MCQs, Mock Tests | CBES Board Class 10 Environmental chemistry i atmosphere multiple choice questions

How much cooler does the air get for every 1 km increase in altitude in the troposphere?

1. 2 degrees
2. 6.5 degrees
3. 8 degrees
4. 10 degrees

✅ Correct Answer: 2

Which of the following is produced when electrical discharges pass through oxygen in the air?

1. chlorofluorocarbons
2. methane
3. ozone
4. lead compounds

✅ Correct Answer: 3

What is the source of lead compounds?

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

✅ Correct Answer: 2

The atmosphere is divided into how many layers?

1. Two
2. Three
3. four
4. Five

✅ Correct Answer: 3

How much higher can be the temperature inside a greenhouse as compared to the outside?

1. 20 °C higher
2. 10 °C to 15 °C higher
3. 5 °C higher
4. 25 °C higher

✅ Correct Answer: 2

The outer layer of the thermosphere is

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

✅ Correct Answer: 2

Minimum temperature of the troposphere is

1. 17 °C
2. −55 °C
3. −5 °C
4. 1800 °C

✅ Correct Answer: 2

The temperature of the outer mesosphere is

1. 93 °C
2. −93 °C
3. ;5 °C
4. −5 °C

✅ Correct Answer: 2

If silk clothes are left in the open air for a week or so, their color fades because of

1. sulphur dioxide is converted into sulphur trioxide
2. dirt
3. carbon monoxide
4. nitrogen oxides

✅ Correct Answer: 1

Height of thermosphere is

1. 50 Km
2. 80 Km
3. above 80 Km
4. 30 Km

✅ Correct Answer: 3

Percentage of hydrogen in the air is

1. 0.99
2. 0.8
3. 0.5
4. 0.25

✅ Correct Answer: 4

Which of the following have an impact on brain development in human beings especially among children?

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

✅ Correct Answer: 4

Which of the following is true about ozone?

1. light blue in colour
2. odourless
3. not harmful
4. not a pollutant

✅ Correct Answer: 1

Which of the following is a powerful irritant which can aggravate the symptoms of people who suffer from respiratory disorders?

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

✅ Correct Answer: 1

What is meant by the term 'meso'?

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

✅ Correct Answer: 2

Which of the following is further divided into two layers?

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

✅ Correct Answer: 4

Group of chemically unreactive compounds that are commonly used as solvents are called

1. chlorofluorocarbons (CFCs)
2. functional groups
3. alkyl groups
4. lead compounds

✅ Correct Answer: 1

Which of the following is produced when dead plant material decays in the absence of air? methane carbon monoxide

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

✅ Correct Answer: 2

Which two main gases are produced when you burn a piece of wood?

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

✅ Correct Answer: 3

The occurrence of weather is in

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

✅ Correct Answer: 1

The thermosphere is divided into how many layers?

1. Two
2. Three
3. four
4. Five

✅ Correct Answer: 1

What is the color of nitrogen dioxide?

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

✅ Correct Answer: 4

Which of the following is not true about carbon monoxide?

1. it is poisonous
2. it is insoluble in water
3. it is an air pollutant
4. it can cause death

✅ Correct Answer: 2

Which of the following is true about sulfur dioxide?

1. it is colorless
2. it is odourless
3. it is not an air pollutant
4. it does not cause breathing difficulties

✅ Correct Answer: 1

Height of troposphere is

1. 10 Km
2. 12 Km
3. 50 Km
4. 80 Km

✅ Correct Answer: 2

Height of troposphere is

1. 10 Km
2. 12 Km
3. 50 Km
4. 80 Km

✅ Correct Answer: 2

The lower layer of the thermosphere is

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

✅ Correct Answer: 1

Which of the following is true about nitrogen dioxide?

1. it is colorless
2. it is odourless
3. it is soluble in water
4. it is soluble in oxygen

✅ Correct Answer: 3

What is the term used for the envelope of gases and water vapor surrounding the planet earth?

1. air
2. atmosphere
3. environment
4. biome

✅ Correct Answer: 2

Which of the following has the lowest percentage in the air?

1. krypton
2. argon
3. hydrogen
4. helium

✅ Correct Answer: 3

Which of the following is responsible for the rise in temperature in the stratosphere?

1. position of stratosphere
2. height of stratosphere
3. ozone
4. sunlight

✅ Correct Answer: 3

Which of the following is true about carbon monoxide?

1. it is poisonous
2. it is insoluble in water
3. it is not an air pollutant
4. it cannot cause death

✅ Correct Answer: 1

Which of the following is true about carbon monoxide?

1. it is poisonous
2. it is insoluble in water
3. it is not an air pollutant
4. it cannot cause death

✅ Correct Answer: 1

Which of the following is not true about sulfur dioxide?

1. it is colorless
2. it is odourless
3. it is an air pollutant
4. it causes breathing difficulties

✅ Correct Answer: 2

Which of the following is not true about nitrogen dioxide?

1. it is reddish brown
2. it has pungent odor
3. it is insoluble in water
4. it is toxic

✅ Correct Answer: 3

An allotropic form of oxygen comprising three oxygen atoms is called

1. ozone
2. oxidation
3. oxidizing agent
4. reducing agent

✅ Correct Answer: 1

Which of the following is true about incineration?

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

✅ Correct Answer: 1

Formation of most of the clouds is in

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

✅ Correct Answer: 1

Height of stratosphere is

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

✅ Correct Answer: 2

Which of the following is the second layer of atmosphere as one moves upwards from the Earth's surface?

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

✅ Correct Answer: 2

What is meant by the term 'tropo'?

1. top
2. first
3. high
4. turning

✅ Correct Answer: 4

Ozone formation and destruction are powered by

1. oxygen gas
2. atomic oxygen
3. ultraviolet radiation
4. chlorine gas

✅ Correct Answer: 3

Majority of the UV rays are screened out by

1. oxygen
2. nitrogen
3. ozone
4. carbon

✅ Correct Answer: 3

Which of the following comes mainly due to the combustion of fuel used in motor vehicles?

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

✅ Correct Answer: 4

Which of the following causes headache and dizziness and can even cause death if inhaled for a long time?

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

✅ Correct Answer: 4

Anything that destroys some part of the environment is called

1. dirt
2. virus
3. pollutant
4. bacteria

✅ Correct Answer: 3

Which of the following is an excellent heat absorber and causes global warming?

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

✅ Correct Answer: 2

Which of the following is the Third layer of atmosphere as one moves upwards from the Earth's surface?

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

✅ Correct Answer: 3

Which of the following is the fourth layer of atmosphere as one moves upwards from the Earth's surface?

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

✅ Correct Answer: 4

The pH of normal rainwater is

1. 4
2. 5
3. 5.6
4. 6.6

✅ Correct Answer: 3

Approximately, what percentage of water vapor is contained by the air in the tropical rain forest?

1. 0.01
2. 0.02
3. 0.03
4. 0.04

✅ Correct Answer: 4