Which of the following statements is are correct regarding the composition of atmosphere 1 Oxy...........

Geography Atmosphere

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Which of the following statements is/are correct regarding the composition of atmosphere?

1)Oxygen is present only in the troposphere

2) Carbon Dioxide is the most abundant gas after Nitrogen and Oxygen

3) Higher Composition of dust particles is found in sub tropical regions when compared to tropical regions.

Select the correct answer using the code given below.

1 and 3 only

2 only

1 and 2 only

3 only

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Explanation:

Statement 1 is incorrect : oxygen is present in small amounts till 120km height of the atmosphere . Troposphere is the lowermost layer of atmosphere present upto average height of 13km.

Statement 2 is incorrect : Composition of atmosphere is as follows:- Nitrogen 78.08, Oxygen 20.95, Argon 0.93,Carbon Dioxide 0.036, Neon 0.002. Hence its Argon and not Carbon dioxide which is abundant gas after Nitrogen and Oxygen

Statement 3 is correct : The higher the concentration of dust particles is found in subtropical and temperate region due to dry winds in comparison to equatorial and polar region which have humidity in winds.