General Science #12 Multiple Choice Questions

GENERAL SCIENCE #12

MULTIPLE CHOICE QUESTIONS

1. The state of thermal equilibrium between two bodies is characterized by which of the following properties?

(a) Thermal capacity

(b) Temperature

(c) Heat

(d) Specific heat

Answer: (b)

2. Why water is used in hot water bottles?

(a) It is cheap

(b) It has low specific heat

(c) It is easily available

(d) It has high specific heat

Answer: (d)

3. Which object is used to see the level of sea?

(a) Microphone

(b) Radar

(c) Periscope

(d) Microscope

Answer: (c)

4. Which object is used for the measurement of temperature?

(a) Thermometer

(b) Pyrometer

(c) Barometer

(d) Voltmeter

Answer: (a)

5. A shooting star that flasher across the sky in the night is really a ……………..

(a) falling star

(b) comet

(c) meteor

(d) falling planet

Answer: (b)

6. In a colour television set, the pictures of which one of the following sets of colours is superimposed to generate true colour picture?

(a) Red, green and blue

(b) Red, yellow and green

(c) Blue, yellow and red

(d) Yellow, green and blue

Answer: (a)

7. An ideal gas is one which obeys ……………..

(a) Gas law

(b) Charles’s law

(c) Avogadro’s hypothesis

(d) Boyle’s law

Answer: (a)

8. The largest number of molecules is in ……………

(a) 46 g of C₂H₅OH

(b) 54 g of N₂O₅

(c) 36 g of H₂O

(d) 28 g of CO₂

Answer: (c)

9. What is the total number of electrons present in one molecule of carbon dioxide?

(a) 66

(b) 88

(c) 22

(d) 44

Answer: (c)

10. Number of molecules in one litre of oxygen at STP is ……………..

(a) 6.02 x 10²³ / 22.4

(b) 6.02 x 10²³ / 32

(c) 32 x 22.4

(d) 6.02 x 10³ / 32

Answer: (d)

11. When salt is dissolved in water there is ……………..

(a) decrease of boiling point

(b) an increase of boiling point

(c) no change in boiling point

(d) None of the above

Answer: (b)

12. Liquid dispersed in gas is called which of the following?

(a) Aerosol

(b) Solid fame

(c) Solution

(d) Solid solution

Answer: (a)

13. Which form of the matter has highest density?

(a) Solid

(b) Gas

(c) Liquid

(d) All of the above

Answer: (a)

14. Circulatory system ……………

(a) helps to burn food

(b) gives message to the body

(c) makes the food into simple form

(d) None of the above

Answer: (d)

15. Digestive system ……………

(a) helps to burn food

(b) makes the food into simple form

(c) gives oxygen to the body

(d) None of the above

Answer: (b)

16. The brain ……………

(a) helps to breathe in air

(b) is the main control centre of the body

(c) pumps blood to all parts of the body

(d) None of the above

Answer: (b)

17. The skin is ……………

(a) breathing organ

(b) sense organ

(c) excretory organ

(d) None of the above

Answer: (b)

18. The master control centre of the human body is in ……………

(a) brain

(b) liver

(c) heart

(d) stomach

Answer: (a)

19. Which of the following is called the complete food?

(a) Vegetable

(b) Milk

(c) Chapati

(d) Cereal

Answer: (b)

20. Which of the following is made up of muscular walls?

(a) Bone

(b) Skin

(c) Heart

(d) Blood

Answer: (c)