Quiz

1. Air is.
A Mixture
An Element
A compound
An Alloy

2. Nitrogen constitutes nearly __ % of the atmosphere.
21
57
79
42

3. A hygroscopic substance is one which.
Absorbs air
Releases water
Absorbs water
Releases air

4. Which of the following is not a constituent of the atmosphere?
Aluminum
Oxygen
Nitrogen
Carbon Dioxide

5. A barometer is used for measuring
Atmospheric Pressure
Temperature
Annual Rainfall
Humidity

6. Which of the following is necessary for a substance to burn?
Oxygen
Light
Gasoline
Hydrogen

7. On burning charcoal which of the following gases is produced?
Oxygen
Nitrous Oxide
Hydrogen
Carbon Dioxide

8. What gas is evolved when HCl is poured on marble chips?
Calcium Carbonate
Carbon Dioxide
HydrogenPeroxide
Hydrogen

9. Air is a.
Solid
Liquid
Plasma
Gas

10. Fish breathe through
Lungs
Gills
Skin
Nose

11. Which of the following is NOT a noble gas?
Hydrogen
Helium
Argon
Krypton

12.When we breathe which of the following gases do we use?
Oxygen
Helium
Carbon Dioxide
Hydrogen