Air and Atmosphere
Trending Questions
Q.
Air contains about 21% oxygen by volume.
- True
- False
Q.
Name the major component of air.
Q.
What are the main components of air? Write down the composition of three main gases present in air by volume.
Q.
what is atmosphere .
Q.
State if the following statements are true or false. Correct the false statement.
Air contains 78 percent oxygen.
- True
- False
Q. The envelope of air that surrounds the Earth is known as:
- Water cycle
- Atmosphere
- Condensation
- All of the above
Q. Plastic bags must be used more instead of cloth bags.
- False
- True
Q. ______ are the chemical substances which are used to enhance human appearances.
- Cosmetics
- Medicines
- Detergents
- Cement
Q. Match the following with respect to Ozone.
- Ozone
- UV light
- CFCs
Q. Write any five properties of air.
Q.
Nitrogen is used in the food packaging industry because it _________
- provides colour to the food
- provides oxygen to the food
- adds proteins and minerals to the food
- keeps the food fresh
Q. Who discovered the subatomic particle called neutron?
- J.J Thomson
- Rutherford
- Chadwick
- E. Goldstein
