Chemistry Class 10 Chapter 16 Important MCQs Federal Board

Chemistry Class 10 Chapter 16 Important MCQs Federal Board

Chemical Industries MCQs

1. The naturally occurring metallic compounds are

A. Acids

B. Bases

C. Minerals

D. All of these

ANSWER. C. Minerals

2. The process of separating a metal from its ore is known as

A. Kinetic Energy

B. Filteration

C. Internal Energy

D. Metallurgy

ANSWER. D. Metallurgy

3. There are —— main steps in metallurgy.

A. 4

B. 5

C. 8

D. 7


4. To remove a mineral from magnetic ore, ——- is used

A. Iron

B. Magnet

C. Copper and Sodium

D. Tungsten

ANSWER. B. Magnet

5. The process of converting a mineral to an oxide below its melting point is known as

A. Solvation

B. Hydration

C. Roasting

D. Crystallization

ANSWER. C. Roasting

6. The method used to reduce metal ions to free metal is

A. Smelting

B. Roasting

C. Concentration

D. Solubility

ANSWER. A. Smelting

7. The temperature of roasted Cu ore is

A. 1200OC

B. 1350 OC

C. 1100 OC

D. 1400 OC

ANSWER. C. 1100 OC

8. The chemical formula of slag is

A. FeSO4

B. Fe2O3

C. FeSiO3

D. CuS


9. The purity of blister copper is about —– %.

A. 67-78

B. 97-99

C. 34-55

D. 88-92.5

ANSWER. B. 97-99

10. In electrolytic refining which type of cell is used

A. Voltaic

B. Galvanic

C. Electrolytic

D. All of these

ANSWER. C. Electrolytic

11. In electrolytic refining impure metal acts as

A. Cathode

B. Anode

C. Both

D. None of the above

ANSWER. B. Anode

12. In electrolytic refining sample of pure metal acts as

A. Cathode

B. Anode

C. Both

D. None of the above

ANSWER. A. Cathode

13. Low melting point metals are refined by

A. Sublimation

B. Evaporation

C. Distillation

D. None of these

ANSWER. C. Distillation

14. Which of the following is manufactured using Solvay process.


B. Na

C. Na2CO3

D. All of these


15. How many raw materials are necessary for Solvay process.

A. 6





16. Concentrated sodium chloride solution is known as

A. Salt

B. Water

C. Chloroform

D. Brine

ANSWER. D. Brine

17. The chemical formula of limestone is


B. CuS

C. Ca[OH]2

D. None


18. The population of the world in 1965 was billion.

A. 4.5

B. 5.5


D. 8

ANSWER. C. 3.5

19. Which of the following is a synthetic fertilizer

A. Urea

B. Copper

C. Iron

D. Silver


20. Percentage of nitrogen is highest in

A. Ammonium sulphate

B. Urea

C. Ammonium Phosphate

D. None


21. The number of raw materials for the manufacture of urea are

A. 5

B. 2

C. 3

D. 1


22. The percentage of Nitrogen in urea is %.

A. 46.6

B. 50

C. 47.7

D. 41.7

ANSWER. A. 46.6

23. Molecular mass of ammonium nitrate is

A. 99

B. 66

C. 80

D. 23


24. Fertilizers are insoluble in

A. Water

B. Acids

C. Bases

D. All of these

ANSWER. A. Water

25. Synthetic fertilizer is—————– to the environment.

A. Useful

B. Hazardous

C. Essential

D. All of these

ANSWER. B. Hazardous

26.————— remove dissolved oxygen in water.

A. Algae

B. Fungi

C. Blue-Green algae

D. None of these


27. ———– in drinking water causes stomach cancer.

A. Sulphates

B. Nitrates

C. Carbonates

D. None of these

ANSWER. B. Nitrates

28. Latin word Petra means

A. Oil

B. Rock

C. Strata

D. Crust


29. Latin word Oleum means

A. Oil

B. Rock

C. Strata

D. Crust


30. Natural gas comprises mainly of

A. Ethene

B. Propyne

C. Methane

D. Methanone

ANSWER. C. Methane

31. The other name of petroleum is

A. Alkane

B. Alkene

C. Alkyne

D. Crude oil

ANSWER. D. Crude Oil

32. ————– is extracted by drilling holes in earth’s crust.

A. Petroleum

B. CO2

C. Ammonium sulphate

D. Calcium carbonates

ANSWER. A. Petroleum

33. The conversion of crude oil into useful products is known as

A. Roasting

B. Smelting

C. Refining

D. Amination

ANSWER. C. Refining

34. The useful products of refining are known as

A. Dividends

B. Fractions

C. Adducts

D. None

ANSWER. B. Fractions

35. Petroleum is refined by

A. Condensation

B. Evaporation

C. Sublimation

D. Fractional Distillation

ANSWER. D. Fractional Distillation

36. The crude oil is heated up to ——— oC

A. 350

B. 400

C. 230

D. 765

ANSWER. B. 400

37. In refining the compounds which do not boil are known as

A. Adducts

B. Sublimates

C. Condensates

D. Residue

ANSWER. D. Residue

38. Each petroleum fraction has its own range.

A. Melting

B. Boiling

C. Heating

D. None

ANSWER. B. Boiling

39. The boiling point of naphtha is oC

A. 30

B. 45

C. 70-120

D. 128-156

ANSWER. C. 70-120

40. Number of carbon atoms in kerosene oil is

A. 6-10

B. 4-22

C. 5-9

D. 10-16

ANSWER. D. 10-16

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