Chemistry 10 (Chapter 14- Atmosphere)

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75-80% mass of atmosphere contains in

• ionosphere

• mesosphere

• stratosphere

• troposphere

Presence of Ozone is responsible for the rise in temperature in

• stratosphere

• troposphere

• mesosphere

• thermosphere

Molecules that covert sunlight to heat energy in thermosphere:

• Hydrogen and Nitrogen

• Methane and Oxygen

• Carbon dioxide and Nitrogen

• Oxygen and Nitrogen

The air pollutant that is not colourless is

• CO

• SO₂

• NO

• NO₂

Which pollutant is produced from power stations?

• CO

• SO₂

• CFCs

• NO₂

Which one is not a greenhouse gas?

• N₂

• CO₂

• CH₄

• Water vapours

In the outer mesosphere, temperature approaches

• $-73\degree C$

• $+73\degree C$

• $-93\degree C$

• $+93\degree C$

Which layer protects earth's surface from being hit by most meteoroids?

• Thermosphere

• Mesosphere

• Stratosphere

• Troposphere

Considerable electrical discharges in the atmosphere produce

• CO₂

• SO₂

• CH₄

• NO and NO₂