MCQ Science Curiosity Chapter 9 Class 8 CBSE Board

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The Amazing World of Solutes, Solvents, and Solutions

1. Why does hot air rise?

Question 1 of 20

2. How does increasing pressure affect the density of gases?

Question 2 of 20

3. Why does ice float on water?

Question 3 of 20

4. At what temperature is water’s density highest?

Question 4 of 20

5. Why does a raw egg sink in tap water?

Question 5 of 20

6. How can you make a raw egg float in water?

Question 6 of 20

7. What is the density of a stone sculpture with a mass of 225 g and a volume of 90 cm³?

Question 7 of 20

8. Will a stone sculpture with a density of 2.5 g/cm³ float or sink in water?

Question 8 of 20

9. Which statement is true about a saturated solution?

Question 9 of 20

10. Why does an unpeeled orange float while a peeled one sinks?

Question 10 of 20

11. Which object is denser: Object A (200 g, 40 cm³) or Object B (240 g, 60 cm³)?

Question 11 of 20

12. How much more water can a 2-liter bottle hold if it contains 500 mL of water?

Question 12 of 20

13. What is the density of an object with a mass of 400 g and a volume of 40 cm³?

Question 13 of 20

14. Why is water considered a good solvent?

Question 14 of 20

15. Why don’t sugar and salt dissolve in oil?

Question 15 of 20

16. How does the density of Earth’s layers change as you move toward the center?

Question 16 of 20

17. Why are traditional salt cakes in Ningel village wrapped in phanek cloth?

Question 17 of 20

18. What is the primary use of salt cakes in Ningel village?

Question 18 of 20

19. What happens to the undissolved baking soda when water is heated from 50°C to 70°C?

Question 19 of 20

20. Why are water bottles typically tall and cylindrical rather than spherical?

Question 20 of 20


 

 

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