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MCQ Science and Technology Class 9 Chapter 14 महाराष्ट्र Board

Substances in Common Use

1. What is a use of sodium carbonate in industry?

Question 1 of 20

2. Which salt has 10 molecules of water of crystallization?

Question 2 of 20

3. What property of alum makes it useful in water purification?

Question 3 of 20

4. What is blue vitriol used for in agriculture?

Question 4 of 20

5. What are soaps chemically?

Question 5 of 20

6. Why does soap form a precipitate in hard water?

Question 6 of 20

7. What defines a radioactive substance?

Question 7 of 20

8. Which radiation deviates substantially toward the positively charged plate?

Question 8 of 20

9. Which radiation was discovered by Willard?

Question 9 of 20

10. Who first discovered the radioactive properties of uranium compounds?

Question 10 of 20

11. What did Madame Curie discover after Becquerel’s findings?

Question 11 of 20

12. What is a use of cobalt-60 in industry?

Question 12 of 20

13. Which isotope is used to prevent sprouting in onions and potatoes?

Question 13 of 20

14. What is a use of strontium-90 in agriculture?

Question 14 of 20

15. Which isotope is used to treat polycythemia?

Question 15 of 20

16. Which isotope is used for detecting small tumors in the body?

Question 16 of 20

17. What is a health hazard of radioactive radiation?

Question 17 of 20

18. What health issue increased in children and adults after the Chernobyl disaster?

Question 18 of 20

19. What is the purpose of adding food colors to commercial products?

Question 19 of 20

20. What harmful substance is found in artificial food colors used in pickles?

Question 20 of 20

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