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MCQs

Total Questions : 26 | Page 2 of 3 pages
Question 11. The mass of atmosphere contained in the troposphere is about
  1.    10-20%
  2.    75-80%
  3.    90-100%
  4.    50-60%
 Discuss Question
Answer: Option B. -> 75-80%
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 12. Percentage of carbon dioxide in the air is
  1.    0.78
  2.    0.21
  3.    0.0093
  4.    0.0004
 Discuss Question
Answer: Option D. -> 0.0004
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 13. The amount of Nitrogen (N2) present in dry air is
  1.    0.2
  2.    0.78
  3.    0.48
  4.    0.68
 Discuss Question
Answer: Option B. -> 0.78
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 14. The maximum amount of ozone (O3) is present in
  1.    troposphere
  2.    stratosphere
  3.    mesosphere
  4.    thermosphere
 Discuss Question
Answer: Option B. -> stratosphere
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 15. The atmosphere consists of
  1.    gases only
  2.    water vapors only
  3.    chemicals
  4.    gases and water vapors
 Discuss Question
Answer: Option D. -> gases and water vapors
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 16. Percentage of helium in the air is
  1.    0.000624
  2.    0.000524
  3.    0.000724
  4.    0.000824
 Discuss Question
Answer: Option B. -> 0.000524
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 17. Ozone gas (O3) has
  1.    unpleasant odor
  2.    pleasant odor
  3.    no odor
  4.    orange color
 Discuss Question
Answer: Option A. -> unpleasant odor
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 18. Ozone (O?) comprises of
  1.    one oxygen atom
  2.    2 oxygen atoms
  3.    3 oxygen atoms
  4.    4 oxygen atoms
 Discuss Question
Answer: Option C. -> 3 oxygen atoms
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 19. The reformation of ozone in the stratosphere is powered by
  1.    ultraviolet radiation
  2.    atmospheric oxygen
  3.    sunlight
  4.    heat
 Discuss Question
Answer: Option A. -> ultraviolet radiation
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 20. The atmospheric layer closest to the earth's surface is
  1.    troposphere
  2.    mesosphere
  3.    stratosphere
  4.    thermosphere
 Discuss Question
Answer: Option A. -> troposphere
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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