1. Which of the following compound is not used as an an alkali?
- Sodium hydroxide
- Potassium hydroxide
- Carbon hydroxide
- Nitrogen hydroxide
Correct Answer: Nitrogen hydroxide
2. Define toxicity?
- A chemical reaction
- A process used in the manufacturing of detergents
- A harmful effect of soaps and detergents required to measure the effectiveness.
- A process used in the manufacturing of soaps
Correct Answer: A harmful effect of soaps and detergents required to measure the effectiveness
3. The process in which a liquid substance change into gas rapidly on heating is called:
- Vaporization
- Boiling
- Freezing
- Condensation
Correct Answer: Boiling
4. A homogeneous mixture of two or more substances in called:
- Solution
- Suspension
- Colloid
- Metal
Correct Answer: Solution
5. What is an element that is malleable and ductile, and conducts electricity called?
- Non-metals
- Metals
- Metalloids
- Ions
Correct Answer: Metals
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6. Name the gas which is used in refrigeration and in fire extinguisher, __________?
- Nitrogen
- Hydrogen
- Carbon dioxide
- Methane
Correct Answer: Carbon dioxide
7. Name a gas used as rocket propellant and in welding also?
- Ether
- Neon
- Hydrogen
- Cyanogen
Correct Answer: Cyanogen
8. Name a gas which is used in the fermentation of sugar?
- Ammonia
- Butane
- Propane
- Carbon dioxide
Correct Answer: Carbon dioxide
9. Name a gas which is used in making chloroform?
- Methane
- Propane
- Butane
- Acetylene
Correct Answer: Methane
10. Quartz is composed of:
- Calcium sulphate
- Calcium silicate
- Sodium sulphate
- Sodium silicate
Correct Answer: Calcium Silicate
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