Air
Tests knowledge about the composition, properties, and layers of air, including gases found in the atmosphere and methods of oxygen preparation.
Questions
Question 1 Multiple Choice (Single Answer)
What is the percentage composition of inert gases in air by volume?
- 78%
- 0.94%
- 21%
- 4%
- 0.03%
Question 2 Multiple Choice (Single Answer)
Which of the following is a false statement?
- Carbon dioxide is used in making soft drinks or cold drinks.
- Sulphur dioxide and nitrogen dioxide cause air pollution.
- Oxygen is called active air.
- Nitrogen is the largest constituent of air that dilutes the activity of oxygen.
- Carbon dioxide gas is vital for respiration.
Question 3 Multiple Choice (Single Answer)
Which of the following is not an atmospheric layer?
- Troposphere
- Stratosphere
- Mesosphere
- Thermosphere
- Hydrosphere
Question 4 Multiple Choice (Single Answer)
Which of the following gases is used in electric bulbs at low pressure?
- Argon
- Helium
- Neon
- Carbon dioxide
- Oxygen
Question 5 Multiple Choice (Single Answer)
Which of the following is used to prepare oxygen in laboratory by using a catalyst, manganese dioxide?
- Hydrogen peroxide
- Potassium chlorate
- Potassium nitrate
- Ozone
- Oxygen cannot be prepared in laboratory