CBSE Guess > Papers > Important Questions > Class XII > 2008 > Chemistry > Chemistry By : Miss Vinita Pandya

Chemistry

Q. 1. What is the role of dimethyl and monomethyl hydrazine in rockets?

Q. 2. Name the type of structure possessed by a unit cell in CsCl.

Q. 3. Why is Copper Sulphate pentahydrate colored?

Q. 4. Give important use of eqanil and morphine.

Q. 5. Why do azo dyes not impart fast color to fabrics?

Q. 6. Why are carbohydrates generally optically active?

Q. 7. Define a ‘ligand’ and give one example.

Q. 8. What is meant by faraday constant?

Q. 9. What is basic building unit of silicates?

Q. 10. Mention the uses of formalin.

Q. 11. When is Vant’s hoff factor more than one?

Q. 12. State first law of thermodynamics.

Q. 13. Why do Zr and Hf exhibit similar property?

Q. 14. What is non stoichiometric defect in crystals?

Q. 15. State a use of enzyme Streptokinase in medicine.

Q. 16. Write composition of a rocket propellent.

Q. 17. What is the role of Bithional in soaps?

Q. 18. What are thermosetting polymers and thermoplastics?

Q. 19. Define Frenkel defect .

Q. 20. Why Boron forms electron deficient compounds?