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

Answers...

1. bacteria
2. pressure
3. Graphite
4. Bromine
5. Argon
6. Ductility
7. Hydrogen
8. All of them
9. wood
10. joule.

Answer 2

$\huge\bf{Answers-}$

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

• Mercury, Bromine rubidium are the elements which are liquid at a room temperature.

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

lb. Metre

☑ c. Joule

ld. Newton

• Joule - Work is said to be 1 joule when the force of 1 Newton applied on an object d it produces displacement of 1 m.