12th Chemistry Important Questions Unit 2 p-Block elements-I

TN 12th Chemistry Important Questions Unit 2 p-Block elements-I. TN 12th Standard Chemistry Important 2 Marks, 12th Chemistry Important 3 Marks, Chemistry Important 5 Marks Questions Based on reduced Syllabus 2021-2022. 12th Free Online Test (MCQs). HSC 12th Chemistry Revision Test Important Questions. 12th Tamil Full Guide.

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12th Chemistry Important Questions

Unit 2 p-Block elements-I

• 1. What is Catenation? describe briefly the catenation property of carbon.
• 2. Give the uses of silicones.
• 3. How will you prepare Borax
• 4. Explain the structure of Boricacid
• 5. Give the uses of Boricacid
• 6. Write the Action of heat on Boricacid
• 7. What is burnt alum
• 8. Give one example for each of the following
  (i) icosogens (ii) tetragen (iii) prictogen (iv)chalcogen
• 9. Write a note on metallic nature of p-block elements.
• 10. Complete the following reactions
  a. B(OH)₃ + NH₃ →
  b. Na₂B₄4O₇ + H₃SO₄ + H₂O→
  c. B + NaOH→
  j. H₂B₄O₇→
• 11. How will you identify borate radical?
• 12. Write a short note on anamolous properties of the first element of the p-block.
• 13. Describe briefly allotropism in p- block elements with specific reference to carbon.
• 14. Give the uses of Borax.
• 15. A hydride of 2nd-period alkali metal (A) on reaction with a compound of Boron (B) to give a reducing agent (C). identify A, B, and C.
• 16. A double salt which contains fourth period alkali metal (A) on heating at 500K gives (B). aqueous solution of (B) gives white precipitate with BaCl2 and gives a red colour compound with alizarin. Identify A and B.
• 17. Write the Action of heat on Borax
• 18. Write the Action of heat on Potash alum
• 19. Mention the uses of Potash alum
• 20. Explain the structure of Fullerenes
• 21. What is the difference between Graphite and Diamond?
• 22. Explain the structure of graphene
• 23. Explain the structure of Carbon nanotubes
• 24. Mention the uses of Carbon nanotubes
• 25. What is Silcones and write its preparation?
• 26. How will you convert boric acid to boron nitride?
• 27. Form Aluminium to Thallium there is only a marginal difference in ionization enthalpy why?
• 28. What are the necessary conditions for catenation?
• 29. What are the anomalous properties of Boron from Boron group elements?
• 30. What are the anomalous properties of Carbon from Carbon group elements?
• 31. What are the anomalous properties of Oxygen from Oxygen group elements?
• 32. What are the anomalous properties of Nitrogen from Nitrogen group elements?
• 33. What are the anomalous properties of Fluorine from Halogen group elements?
• 34. Write the types of Silcones.
• 35. Write the Properties of Silcones

12th Chemistry All Units Important Questions