Composition and structure of atmosphere

1. Which of the following gases is essential for plants?

• Oxygen

• carbon dioxide

• Argon

• Helium

2.At which height oxygen is almost in next level quantity?

• 100km

• 120km

• 150Km

• 180km

3. Which of the following gas is found in abundance in the atmosphere?

• Oxygen

• Nitrogen

• CO2

• Argon

4. Which of the following gases is largely responsible for the greenhouse effect?

• Oxygen

• Co2

• Xenon

• Krypton

5.Which of the following is the lowermost layer of the atmosphere?

• Stratosphere

• Troposphere

• Mesosphere

• Ionosphere

6. Atmosphere contains which of the following element?

• Gases

• Dust particles

• Water vapour

• All of these

7. Dust particles are a mixture of which of the following matters?

• Sea salt

• Smoke soot

• Ash

• All of these

8. Which one of the following gases constitutes the major portion of the atmosphere?

• Oxygen

• Nitrogen

• Organ

• carbon dioxide

9. Atmospheric layer important for human being is:

• Troposphere

• Mesosphere

• Ionosphere

• Stratosphere

10. Around 99% of the total mass of the atmosphere is confined at what height?

• 15 km

• 13 km

• 25 km

• 32 km