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MCQ General Science Chapter 9 Class 7 Maharashtra Board

MCQ For All Chapters – General Science Class 7

Heat

1. What occurs when the water in the conical flask cools?

Question 1 of 20

2. Why is mercury used in a thermometer?

Question 2 of 20

3. What happens to a balloon fixed on a glass bottle when placed in hot water?

Question 3 of 20

4. What happens to the gas in the balloon when heat is removed?

Question 4 of 20

5. Who invented the thermos flask?

Question 5 of 20

6. What prevents heat conduction in a thermos flask?

Question 6 of 20

7. Why does the silver coating in a thermos flask help retain heat?

Question 7 of 20

8. What absorbs the most heat according to the document?

Question 8 of 20

9. Which mode of heat transfer does not require a medium?

Question 9 of 20

10. What type of substance conducts heat well?

Question 10 of 20

11. Why are cooking utensils made of metals?

Question 11 of 20

12. How does the earth receive heat from the sun?

Question 12 of 20

13. Which of these will absorb heat the most?

Question 13 of 20

14. How does a cold compress lower a fever?

Question 14 of 20

15. Why are houses in Rajasthan painted white?

Question 15 of 20

16. Which mode of heat transfer causes sea breezes?

Question 16 of 20

17. Why is a glass bottle more likely to crack with boiling water than a borosil one?

Question 17 of 20

18. Why do telephone wires sag in summer?

Question 18 of 20

19. Why does an iron pillar feel colder than a wooden pole in winter?

Question 19 of 20

20. Why are heaters placed near the floor?

Question 20 of 20


 

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