Kerala PSC Chemistry Questions Part 2

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