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Chemistry - p Block Elements (Group 15, 16, 17 & 18)

Practise 38 WBJEE previous year questions on p Block Elements (Group 15, 16, 17 & 18), compiled from papers spanning 2009 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty WBJEE tests.

p Block Elements (Group 15, 16, 17 & 18) has been asked in 17 of the 18 years of WBJEE papers analysed (2009–2026), with 38 questions in all. 58% of them were easy, 37% moderate and 5% tough. Most of its questions came from 2016, with 4 questions that year. In the last three years (2024–2026) it had 5 questions across 3 papers, about 1.7 per paper.

The chapter's 6 topics are not weighted equally: Halogens and Its Compounds (11 questions, 29%), Phosphorus and Its Compounds (10 questions, 26%), and Nitrogen and Its Compounds (7 questions, 18%) have been asked the most. Over the last five years the most frequent topics have been Phosphorus and Its Compounds (2), Halogens and Its Compounds (2), and Nitrogen and Its Compounds (2). Nitrogen and Its Compounds has produced the most tough questions (2).

  1. 1Which of the following is the structure of pyrosulphuric acid?2026Sulphur and Its Compounds
  2. 2How many electrons are needed to reduce to ?2025Nitrogen and Its Compounds
  3. 3The number of lone pair of electrons and the hybridization of Xenon in are2025Noble Gases
  4. 4How many linkages are there in2024Phosphorus and Its Compounds
  5. 5The number(s) of -OH group(s) present in and is/are2024Phosphorus and Its Compounds
  6. 6\( {BrF}_3\) self ionises as following2023Halogens and Its Compounds
  7. 7The correct order of acidity of the following hydra acids is2022Halogens and Its Compounds
  8. 8During the preparation of in Haber's process, the promoter(s) used is / are -2022Nitrogen and Its Compounds
  9. 9A solution of , when treated with a mixture of dust and ' ' yields ammonia. ' ' can be2021Nitrogen and Its Compounds
  10. 10Reaction of silver nitrate solution with phosphorous acid produces:2021Phosphorus and Its Compounds
  11. 11Which of the following statement(s) is/are incorrect:2020Nitrogen and Its Compounds
  12. 12The reactive species in chlorine bleach is2019Halogens and Its Compounds
  13. 13The correct order of the addition reaction rates of halogen acids with ethylene is2019Halogens and Its Compounds
  14. 14is the anhydride of2018Halogens and Its Compounds
  15. 15At room temperature, the reaction between water and fluorine produces2018Halogens and Its Compounds
  16. 16White phosphorous has the following characteristics2018Phosphorus and Its Compounds
  17. 17The shape of will be2017Noble Gases
  18. 18is insoluble in cold water. Addition of increases its solubility due to2017Halogens and Its Compounds
  19. 19Nitrogen dioxide is not produced on heating2016Nitrogen and Its Compounds
  20. 20In the solid state, exists as2016Phosphorus and Its Compounds
  21. 21The acid in which bonding is present is2016Sulphur and Its Compounds
  22. 22The correct order of bond length in and is2016Oxygen and Its Compounds
  23. 23Sulphuryl chloride ) reacts with white phosphorus to give2015Phosphorus and Its Compounds
  24. 24Ionisation potential values of noble gases decrease down the group with increase in atomic size. Xenon forms binary fluorides by the direct 2015Noble Gases
  25. 25Among the following observations, the correct one that differentiates between and is2014Sulphur and Its Compounds
  26. 26Nitric acid can be obtained from ammonia via the formations of the intermediate compounds2013Nitrogen and Its Compounds
  27. 27Chlorine gas reacts with red hot calcium oxide to give2013Halogens and Its Compounds
  28. 28Sulphan' is2013Sulphur and Its Compounds
  29. 29On heating, chloric acid decomposes to2013Halogens and Its Compounds
  30. 30Which one of the following is not true at room temperature and pressure2011Sulphur and Its Compounds
  31. 31Which of the following is used to prepare \( {Cl}_2\) gas at room temperature from concentrated \( {HCl}\) ?2011Halogens and Its Compounds
  32. 32\( {NO}_2\) is not obtained on heating2011Nitrogen and Its Compounds
  33. 33Which one of the following contains bond ?2010Phosphorus and Its Compounds
  34. 34Which of the following statements regarding ozone is not correct?2010Oxygen and Its Compounds
  35. 35is the anhydride of2010Phosphorus and Its Compounds
  36. 36Of the following compounds the most acidic is2009Phosphorus and Its Compounds
  37. 37The reaction that takes place when gas is passed through conc. solution is :2009Halogens and Its Compounds
  38. 38Atoms in a molecule of white phosphorus are arranged regularly in the following way:2009Phosphorus and Its Compounds

Frequently Asked Questions

1.How many questions are available for p Block Elements (Group 15, 16, 17 & 18)?

This chapter includes 38 questions compiled from WBJEE papers spanning 2009 to 2026.

2.Are these questions only from WBJEE, or from other exams too?

These are WBJEE questions specifically for the p Block Elements (Group 15, 16, 17 & 18) chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is p Block Elements (Group 15, 16, 17 & 18) an important chapter for WBJEE Chemistry?

p Block Elements (Group 15, 16, 17 & 18) has appeared in 17 of the 18 years of WBJEE papers covered here, with 38 questions across 17 papers - about 2 per paper it appears in.

4.What is the difficulty level of p Block Elements (Group 15, 16, 17 & 18) questions in WBJEE?

Of the 38 questions analysed for this chapter, 58% are easy, 37% moderate and 5% tough. 2016 had the most, with 4 questions.

5.Which topics in p Block Elements (Group 15, 16, 17 & 18) should I focus on?

These topics have carried the most weightage in p Block Elements (Group 15, 16, 17 & 18):

  • Halogens and Its Compounds - 11 questions (29%)
  • Phosphorus and Its Compounds - 10 questions (26%)
  • Nitrogen and Its Compounds - 7 questions (18%)
  • Nitrogen and Its Compounds has produced the most tough questions (2).
6.Is p Block Elements (Group 15, 16, 17 & 18)'s weightage in WBJEE going up or down?

Across all 17 papers analysed, p Block Elements (Group 15, 16, 17 & 18) has averaged about 2.2 questions per paper. In the last three years (2024–2026), that average has fallen, at about 1.7 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.