Environmental Chemistry I: Atmosphere MCQs + Answer Key

Q.1) The outermost layer of the earth atmosphere is

A. The thermosphere

B. The stratosphere

C. The mesosphere

D. The troposphere

Q.2) The lowest temperature in stratosphere is?

A. -5 0C

B. -55 0C

C. 5 0C

D. 55 0C

Q.3) Which is the reddish brown gas?

A. NO

B. SO2

C. NO2

D. O3

Q.4) Which gas has the highest percentage in the air?

A. CO2

B. O2

C. N2

D. O3

Q.5) Troposphere extends up to

A. 50 km

B. 80 km

C. 18 km

D. 12 km

Q.6) Which is /are responsible for acidic rain?

A. SO2

B. O3

C. NO2

D. SO2 and NO2

Q.7) Most air pollution is caused by?

A. Acid rain

B. Ozone

C. The burning of fossil fuels

D. Carbon monoxide

Q.8)

The stratosphere extends up to?

A. 50 km

B. 12 km

C. 80 km

D. 15 km

Q.9) The ozone layer is found in?

A. The mesosphere

B. The thermosphere

C. The troposphere

D. The stratosphere

Q.10) Which layer is closest to the Earth?

A. The mesosphere

B. The thermosphere

C. The troposphere

D. The stratosphere

Answer Key

Q.1) The thermosphere

Q.2) -55 0C

Q.3) NO2

Q.4) N2

Q.5) 12 km

Q.6) SO2 and NO2

Q.7) The burning of fossil fuels

Q.8) 50 km

Q.9) The stratosphere

Q.10) The troposphere

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