Kerala PSC Chemistry Questions Part 1

  1. Which of the following is the poorest conductor of heat in comparison to other options?
  • Silver
  • Copper
  • Lead
  • Mercury

Correct Answer: Lead

2. Which among the following is the correct set of chemical formulae of Chile Saltpetre, Saltpetre and Quick  Lime?

  • KNO3, NaNO3, CaO
  • NaNO3, KNO3, Ca(OH)2
  • Na(OH)2, KOH, CaO
  • NaNO3, KNO3, CaO

Correct Answer: NaNO3, KNO3, CaO

3. Dalton’s name is associated with which of the following terms?

  • Electron
  • Proton
  • Atom
  • Neutron

Correct Answer: Atom

4. Which among the following methods can be used to remove the permanent hardness in water due to calcium or magnesium sulphates?

  • Sulphonate method
  • Nitrate method
  • Zeolite method
  • None of these

Correct Answer: Zeolite method

5. Which among the following is called Laughing Gas popularly?

  • Nitric oxide
  • Nitrous oxide
  • Nitrogen penta oxide
  • Nitrogen

Correct Answer: Nitrous oxide

6. Which among the following happens in an oxidation reaction?

  • Electrons are gained
  • Electrons are lost
  • Protons are gained
  • Protons are lost

Correct Answer: Electrons are lost

7. Which among the following is the correct decreasing of bio elements in Human Body?

  • oxygen, hydrogen, Carbon, nitrogen, calcium, and phosphorus
  • oxygen, carbon, nitrogen, hydrogen, calcium, and phosphorus
  • oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus
  • carbon, oxygen, hydrogen, nitrogen, calcium, and phosphorus

Correct Answer: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus

8. Which is sold as a weed killer of the broad-leaved weeds is a synthetic version of __:

  • Auxin Hormone
  • Cytokinin Hormone
  • Gibberellin
  • None of them

Correct Answer: Auxin Hormone

9. Tell the composition of soap?

  • Sodium salt with fatty acids.
  • Potassium salt with fatty acids
  • Both a & b
  • Sodium and Potassium salt mixed with chemicals

Correct Answer: Both- Sodium salt with fatty acids & Potassium salt with fatty acids

10. Detergent is defined as…..

  • A liquid surfactant
  • A liquid soluble
  • A liquid sovent
  • A liquid solution

Correct Answer: A liquid surfactant