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Chemistry Quiz

Questions: 10 Difficulty: Mixed

You can only choose once. Choose wisely.

1. Which gas is used in balloons to make them float? (Chemistry)

Nitrogen
Helium
Oxygen
Hydrogen

2. What is the molecular formula for ethanol? (Chemistry)

CH3OH
C3H8
C2H5OH
CH4

3. What is the atomic number of oxygen? (Chemistry, Science)

9
8
7
6

4. What is the molecular formula for ozone? (Chemistry)

O
O4
O3
O2

5. Which element is a liquid at room temperature? (Chemistry)

Mercury
Lead
Bromine
Gallium

6. What is the term for the energy required to start a chemical reaction? (Chemistry)

Heat of fusion
Heat of vaporization
Activation energy
Reaction energy

7. What is the term for a substance that donates protons in a reaction? (Chemistry)

Acid
Base
Catalyst
Reactant

8. What is the name of the process by which plants convert sunlight into chemical energy? (Chemistry)

Respiration
Chemosynthesis
Photosynthesis
Oxidation

9. What is the most abundant gas in Earth’s atmosphere? (Chemistry)

Carbon dioxide
Argon
Oxygen
Nitrogen

10. Which gas is also known as laughing gas? (Chemistry, General Knowledge)

Methane
Oxygen
Nitrous Oxide
Carbon Dioxide