Question

9. Cholera is caused by a

a. Virus b. Bacteria c. Protozoa d. Fungi

10. The force acting on a unit area of a surface

a. Pressure b. Force c. Drag d. Friction

11. Which of the following is a good conductor of electric current?

a. Graphite b. Sulphur c. Silicon d. Diamond

12. Which of the following is a liquid at room temperature?

a. Chlorine b. Phosphorous c. Iodine d. Bromine

13. The gas usually filled in the electric bulb is

a. Hydrogen b. Nitrogen c. Oxygen d. Argon

14. Copper and silver can be drawn into wires because these are

a. Ductile b. Malleable c. Sonorous d. Conductors

15. Which of the following gasses is evolved when metals react with

acids?

a. Hydrogen b. Nitrogen c. Oxygen d. Chlorine

16. A good fuel should have

a. High calorific value b. Low ignition temperature c. Low

cost and easy availability d. All of them

17. Which of the following fuel has highest calorific value?

a. Wood b. Hydrogen c. Petrol d. Coal

18. The SI unit of energy is

a. Kilogram b. Metre c. Joule d. Newton​

Answer 1

Answer:

12. mercury

18. Joule

10. pressure

Answer 2

Answer:

9. Bacteria

10. Pressure

11. Graphite

12. Bromine

13. Nitrogen

14. Malleable

15. Hydrogen

16. High calorific value

17. Hydrogen

18. Joule

Explanation:

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