Punjab 10th Class Chemistry Chapter 8 Chemical Industries Test Preparation Online

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Question 1 of 10

Chemistry

1. Calcination is the process in which sodium hydrogen carbonate is heated to get sodium carbonate. Which is not obtained in this process?

1.CO

2.CO₂

3.Na₂CO₃

4.H₂O

Question 1 of 10

Question 2 of 10

2. Which of the followings is not a raw material for the manufacture of soda ash.

1.Lime stone

2.Ammonia

3.Brine

4.Carbon monoxide

Question 2 of 10

Question 3 of 10

3. What happens when ammonium carbonate is distilled with steam?

1.Urea is produced

2.Urea solution is produced

3.Carbon dioxide is released

4.Ammonia is produced

Question 3 of 10

Question 4 of 10

4. The naturally occurring metallic compounds are called as

1.Ore

2.Rock

3.Mineral

4.Gangue

Question 4 of 10

Question 5 of 10

5. A mixture of Cu₂S and FeS called matte is produced in one of the metallurgical operations in the extraction of copper. The name of this operation is:

1.Electro-refining

2.Bessemerization

3.Roasting

4.Smelting

Question 5 of 10

Question 6 of 10

6. Which of the following steps is not used in the extraction process of metals:

1.Roasting

2.Bessemerization

3.Flotation

4.Smelting

Question 6 of 10

Question 7 of 10

7. Percentage of nitrogen in urea is

1.35

2.46.6

3.21.2

4.80

Question 7 of 10

Question 8 of 10

8. In electrolytic refining of copper, __________ is used as anode.

1.Pure copper

2.Impure copper

3.Electrolytic tank

4.Copper sulphate

Question 8 of 10

Question 9 of 10

9. The separation of minerals from gangue is called concentration. Which of the following methods is used for concentration?

1.Smelting

2.Flotation

3.Refining

4.Roasting

Question 9 of 10

Question 10 of 10

10. Chemical formula of slaked lime is

1.CaCl₂

2.CaCO₃

3.Ca(OH)₂

4.CaO

Question 10 of 10

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