NTPC CBT-2 Chemistry Quiz - 62

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Question 1:

Which one of the following does not represent the salt, Calcium carbonate ?

Question 2:

The poisonous gases which contain chlorine are

  1. Phosgene gas
  2. Tear gas
  3. Laughing gas
  4. Chloropicrin gas

Question 3:

For hard soaps , which of the following solution is used in the saponification of fats or oils?

Question 4:

Detergents are synthetic soaps like cleansing agents and are also known as ____________

Question 5:

Which of the following is an example of non-ionic detergent?

Question 6:

Which of the following detergent is used in toothpaste and in washing clothes?

Question 7:

Which of the following statements are correct?

  1. Synthetic detergents can be used in hard water.
  2. Synthetic detergents can be used in acidic medium.
  3. Synthetic detergents are more soluble in water than soaps.
  4. All synthetic detergents are biodegradable in nature.

Question 8:

Plasticizers are added during the manufacture of paints 

  1. In order to provide elasticity to the film
  2. In order to increase cracking of film
  3. In order to decrease elasticity of the film
  4. In order to minimize cracking of film

Question 9:

Chemicals like phosphates present in fertilizers or detergents mix in water bodies cause excessive growth of-

Question 10:

Water can be conserved by 

  1. Constructing dams and reservoirs
  2. Adopting water harvesting techniques
  3. Cutting more trees
  4. By using drip irrigation method
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