Height of stratosphere is

  • 0-12 Km
  • 12-50 Km
  • 50-80 Km
  • above 80 Km

The lower layer of the thermosphere is

  • ionosphere
  • exosphere
  • mesosphere
  • stratosphere

Which of the following is true about nitrogen dioxide?

  • it is colorless
  • it is odourless
  • it is soluble in water
  • it is soluble in oxygen

Which of the following is not true about nitrogen dioxide?

  • it is reddish brown
  • it has pungent odor
  • it is insoluble in water
  • it is toxic

Which of the following is the second layer of atmosphere as one moves upwards from the Earth's surface?

  • troposphere
  • stratosphere
  • mesosphere
  • thermosphere

What is meant by the term 'tropo'?

  • top
  • first
  • high
  • turning

What is the term used for the envelope of gases and water vapor surrounding the planet earth?

  • air
  • atmosphere
  • environment
  • biome

An allotropic form of oxygen comprising three oxygen atoms is called

  • ozone
  • oxidation
  • oxidizing agent
  • reducing agent

The thermosphere is divided into how many layers?

  • two
  • three
  • four
  • five

Ozone formation and destruction are powered by

  • oxygen gas
  • atomic oxygen
  • ultraviolet radiation
  • chlorine gas

Which of the following has the lowest percentage in the air?

  • krypton
  • argon
  • hydrogen
  • helium

Which of the following is responsible for the rise in temperature in the stratosphere?

  • position of stratosphere
  • height of stratosphere
  • ozone
  • sunlight

Which of the following is further divided into two layers?

  • troposphere
  • stratosphere
  • mesosphere
  • thermosphere

Percentage of hydrogen in the air is

  • 0.99
  • 0.8
  • 0.5
  • 0.25

Which of the following have an impact on brain development in human beings especially among children?

  • chlorofluorocarbons (CFCs)
  • methane
  • carbon monoxide
  • lead compounds

Which of the following is true about incineration?

  • it consumes all combustible materials
  • it is a clean process
  • it does not produce air pollution
  • it does not generate odor

What is the color of nitrogen dioxide?

  • colorless
  • pink
  • brown
  • reddish brown

Which of the following is not true about carbon monoxide?

  • it is poisonous
  • it is insoluble in water
  • it is an air pollutant
  • it can cause death

Which of the following is true about sulfur dioxide?

  • it is colorless
  • it is odourless
  • it is not an air pollutant
  • it does not cause breathing difficulties

Group of chemically unreactive compounds that are commonly used as solvents are called

  • chlorofluorocarbons (CFCs)
  • functional groups
  • alkyl groups
  • lead compounds
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