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
ANSWER. A. 4
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
ANSWER. C. FeSiO3
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.
A. NaOH
B. Na
C. Na2CO3
D. All of these
ANSWER. C. Na2CO3
15. How many raw materials are necessary for Solvay process.
A. 6
B.5
C.3
D.2
ANSWER. C.3
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
A. NaOH
B. CuS
C. Ca[OH]2
D. None
ANSWER. C. Ca[OH]2
18. The population of the world in 1965 was billion.
A. 4.5
B. 5.5
C.3.5
D. 8
ANSWER. C. 3.5
19. Which of the following is a synthetic fertilizer
A. Urea
B. Copper
C. Iron
D. Silver
ANSWER. A. Urea
20. Percentage of nitrogen is highest in
A. Ammonium sulphate
B. Urea
C. Ammonium Phosphate
D. None
ANSWER. B. Urea
21. The number of raw materials for the manufacture of urea are
A. 5
B. 2
C. 3
D. 1
ANSWER. B.2
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
ANSWER. C. 80
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
ANSWER. A.Algae
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
ANSWER. B. Rock
29. Latin word Oleum means
A. Oil
B. Rock
C. Strata
D. Crust
ANSWER. A. Oil
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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