2. Which inert gas is used to fill in electric bulbs with nitrogen ?
3. The blocks of which metal are used to protect harmful emissions from radioactive minerals ?
4. Color of Ozone molecule is ?
5. What is known as "Baking soda" ?
6. What is known as "Washing soda"?
7. Which element is used for Nuclear reactor tubes ?
8. Which poisonous gas affects the Hemoglobin of blood ?
9. Slaked lime is chemically known as ?
10. Who arranged the elements, in their increasing order of atomic weight ?
11. The metal used in storage batteries is ?
12. In which direction does Rainbow appear in the morning ?
13. The gas dissolved in water that makes it basic is ?
14. In mammals ammonia produced by metabolism is converted into urea in the ?
15. Which gas formed when Potassium Permanganate is heated ?
16. The mixture of Potassium carbonate and Sodium carbonate is known as ?
17. Gypsum is chemically known as ?
18. Which halogen is a liquid at room temperature ?
19. Which reducing agent is used for extraction of highly reactive metal from their ores ?
20. Which element has the maximum number of natural Isotopes ?
21. Detergents are sodium and potassium salts of ?
22. Downs process is used for the extraction of ?
23. The symbol "Fe" indicates ?
24. The symbol "Ag" indicates ?
25. The symbol "Hg" indicates ?
26. The symbol "Au" indicates ?
27. The symbol "K" indicates ?
28. The symbol "Sb" indicates ?
29. The symbol "Pb" indicates ?
30. The pungent smell emitted while scratching the matchbox ?
0 comments:
Post a Comment