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NCERT Exemplar · Class 12 · Chemistry

Chapter 7: The P-Block Elements

Practice each question, then open the answer or worked solution.

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II. Multiple Choice Questions (Type-II)

31 questions
Q58Written answer

Phosphorus forms a number of oxoacids. Out of these oxoacidsphosphinicacid has strong reducing property. Write its structure and also write a reaction showing its reducing behaviour.

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Worked solution

4AgNO3 + H3PO2 + 2H2O 4Ag + H3PO4 + 4HNO3

2HgCl2 + H3PO2 + 2H2O 2Hg + H3PO4 + 4HCl

Class 12 Chemistry NCERT Exemplar for The p Block Elements

This chapter is one of the most important chapters for the CBSE Class 12 board examination. Every year, approximately 4 questions are asked from this chapter. To answer all questions related to the chapter, students are advised to solve the NCERT Exemplar Class 12 Chapter 7 The P Block Elements. The important topics discussed in the chapter are

  1. Group 15 Elements
  2. Dinitrogen
  3. Ammonia
  4. Oxides of Nitrogen
  5. Nitric Acid
  6. Phosphorus — Allotropic Forms
  7. Phosphine
  8. Phosphorus Halides
  9. Oxoacids of Phosphorus
  10. Group 16 Elements
  11. Dioxygen
  12. Simple Oxides
  13. Ozone
  14. Sulphur — Allotropic Forms
  15. Sulphur Dioxide
  16. Oxoacids of Sulphur
  17. Sulphuric Acid
  18. Group 17 Elements
  19. Chlorine
  20. Hydrogen Chloride
  21. Oxoacids of Halogens
  22. Interhalogen Compounds
  23. Group 18 Elements

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