10th class chemistry unit 8 MCQs
chapter 8 MCQs 10th Class Chemistry
Chemical Industries:
1. Chalco-pyrite is an ore of:
a. Iron
b. Copper
c. Aluminium
d. Silver
2. The chemical formula of chalco-pyrite is:
a. CuS
b. Cu2S
c. FeS
d. CuFe2S
3. The underground and other impurities present in minerals are called:
a. Gang
b. Metallurgy
c. Compounds
d. Ores
4. ……… is called the king of chemicals:
a. H2SO4
b. HCl
c. H3PO4
d. HNO3
5. The brown colour of the hairs is due to the presence of ……… compounds:
a. Molybdenum
b. Titanium
c. Mercury
d. Copper
6. Ammonia is prepared by the process called:
a. Floatation process
b. Solvay’s process
c. Hyber’s process
d. Hibr’s process
7. The quantity of nitrogen in urea is:
a. 56.6%
b. 76.6%
c. 46.6%
d. 66.6%
8. The preparation of urea consists of ……… stages:
a. Four
b. Two
c. Five
d. Three
9. In Haber’s process, the catalyst used is:
a. Cadmium
b. Nickel
c. Sodium
d. Platinum
10. The number of units in Pakistan for the preparation of urea are:
a. Six
b. Four
c. Ten
d. Five
11. The gas prepared by haber process is:
a. HI
b. CO2
c. NH3
d. SO2
12. Petroleum fraction having molecular composition C1 – C4 is called:
a. Gasoline or petrol
b. Petroleum gas
c. Kerosene oil
d. Petroleum ether
13. Petroleum fraction having molecular composition C5 – C7 is called:
a. Gasoline or petrol
b. Petroleum gas
c. Kerosene oil
d. Petroleum ether
14. How many carbons atoms are there in gasoline?
a. Thirteen to fifteen
b. Five to seven
c. Fifteen to eighteen
d. Seven to ten
15. The molecular composition of kerosene oil is:
a. C10 – C12
b. C5 – C7
c. C13 – C15
d. C7 – C10
16. The carbon composition of diesel oil is:
a. C13 – C15
b. C7 – C10
c. C15 – C18
d. C10 – C12
17. Petroleum fraction whose composition is C and C is called:
a. Gasoline or petrol
b. Petroleum gas
c. Kerosene oil
d. Petroleum ether
18. Which fraction of petroleum is used as fuel in ships and industries?
a. Diesel oil
b. Petroleum gas
c. Fuel oil
d. Petrol
19. Which of the following fraction is used as laboratory solvent?
a. Petroleum ether
b. Kerosene oil
c. Fuel oil
d. Diesel oil
20. The molecular composition of gasoline is:
a. C10 – C12
b. C5 – C7
c. C13 – C15
d. C7 – C10
21. The molecular composition of fuel oil is:
a. C13 – C15
b. C7 – C10
c. C15 – C18
d. C10 – C12
22. The boiling range of gasoline or petrol is:
a. 250 to 350 oC
b. 80 to 170 oC
c. 350 to 400 oC
d. 170 to 250 oC
23. The boiling range of petroleum ether is:
a. 20 – 170 oC
b. 170 – 250 oC
c. 80 – 170 oC
d. 30 – 80 oC
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