p - Block Elements - I Two Marks Questions

12th Standard EM

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Chemistry

Time : 00:45:00 Hrs
Total Marks : 30
    15 x 2 = 30
  1. Write a short note on anamolous properties of the first element of p-block

  2. Describe briefly allotropism in p- block elements with specific reference to carbon

  3. Give the uses of Borax

  4. Write a note on Fisher tropsch synthesis

  5. Give the structure of CO and CO2.

  6. How is boric acid extracted from borax?

  7. Write the reaction of diboranes with water and alkali.

  8. Give the uses of alum.

  9. What is phosgene? How is it prepared?

  10. What is water gas equilibrium?

  11. What happens to CO2 when dissolved in water?

  12. Name the building block of zeolites. Why zeolites have high porosity?

  13. (i) Silicones are used for making waterproof fabrics. Give reason.
    (ii) Diamond - bad conductor of electricity.

  14. What is crystal field splitting?

  15. Which one is more soluble in diethyl ether, anhydrous Alcl3 or hydrated Alcl3? Explain in terms of bonding.

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