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

Practise 31 COMEDK previous year questions on p Block Elements (Group 15, 16, 17 & 18), compiled from papers spanning 2012 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 COMEDK tests.

p Block Elements (Group 15, 16, 17 & 18) has been asked in 14 of the 15 years of COMEDK papers analysed (2012–2026), with 31 questions in all. 45% of them were easy, 42% moderate and 13% tough. Most of its questions came from 2015, with 7 questions that year. In the last three years (2024–2026) it had 2 questions across 2 papers, about 1 per paper.

The chapter's 5 topics are not weighted equally: Nitrogen and Its Compounds (8 questions, 26%), Phosphorus and Its Compounds (8 questions, 26%), and Halogens and Its Compounds (6 questions, 19%) have been asked the most. Over the last five years the most frequent topics have been Phosphorus and Its Compounds (3), Halogens and Its Compounds (1), and Nitrogen and Its Compounds (1). Nitrogen and Its Compounds has produced the most tough questions (2).

  1. 1Which among the following is NOT in accordance with the property stated against it?09 May, 2026 (S1)Halogens and Its Compounds
  2. 2Given are the following molecules. Which of the above oxoacids results into two series of salt?2024 (Memory Based)Phosphorus and Its Compounds
  3. 3Given are and . Which of the above oxacids results into two series of salts?2023 (Memory Based)Phosphorus and Its Compounds
  4. 4Given are and . Which of the above oxacids results into two series of salts?2023 (Morning Shift)Phosphorus and Its Compounds
  5. 5Which among the following will not liberate nitrogen on reaction with nitrous acid?2022Nitrogen and Its Compounds
  6. 6In the chemical reaction, at equilibrium point.2021Nitrogen and Its Compounds
  7. 7When conc. is heated with , the acid is converted into2020Phosphorus and Its Compounds
  8. 8The noble gas mixture is cooled in a coconut bulb at . The gases that are not adsorbed are2020Noble Gases
  9. 9To dry ammonia gas the drying agent used is2019Nitrogen and Its Compounds
  10. 10The formation of is basis for the formation of xenon fluorides. This is because2018Noble Gases
  11. 11Excess of reacts with con(c) giving2017Halogens and Its Compounds
  12. 12Which is the most easily liquefiable rare gas?2017Noble Gases
  13. 13Helium is used in balloons in place of hydrogen because it is2017Noble Gases
  14. 14In the electrothermal process, the compound displaced by silica from calcium phosphate is2016Phosphorus and Its Compounds
  15. 15Among the halogens, the one which is oxidised by nitric acid is2016Halogens and Its Compounds
  16. 16The metal which does not form ammonium nitrate by reaction with dilute nitric acid is2016Nitrogen and Its Compounds
  17. 17Choose the correct statement applicable for the reaction:2015Halogens and Its Compounds
  18. 18Which is true about the lead ions in ?2015Phosphorus and Its Compounds
  19. 19Which of the following chemicals does not liberate hydrogen gas on reaction with aluminium metal?2015Nitrogen and Its Compounds
  20. 20Which of the following reactions does not produce ?2015Phosphorus and Its Compounds
  21. 21The decreasing order of stability of oxides of halogen is2015Halogens and Its Compounds
  22. 22does not show property of catenation because2015Nitrogen and Its Compounds
  23. 23An element belonging to chalcogen group is2015Sulphur and Its Compounds
  24. 24Solid reacts with strong liberating a foul smelling gas which spontaneously burn in air giving smoky rings. and are respectively.2014Phosphorus and Its Compounds
  25. 25. This equation represents preparation of sulphur sol by2014Sulphur and Its Compounds
  26. 26Which of the following inert gas compounds is not formed?2014Noble Gases
  27. 27Nitrogen shows maximum covalency of 4 whereas, other heavier elements of the group show higher covalency because,2014Nitrogen and Its Compounds
  28. 28The photographic industry relies on the special light sensitive properties of2014Halogens and Its Compounds
  29. 29In the manufacture of sulphuric acid by contact process, Tyndall box is used to2013Sulphur and Its Compounds
  30. 30Urea is preferred to ammonium sulphate as a nitrogenous fertiliser because2013Nitrogen and Its Compounds
  31. 31Which of the following is not true for concentrated ?2012Sulphur and Its Compounds

Frequently Asked Questions

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

This chapter includes 31 questions compiled from COMEDK papers spanning 2012 to 2026.

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

These are COMEDK 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 COMEDK Chemistry?

p Block Elements (Group 15, 16, 17 & 18) has appeared in 14 of the 15 years of COMEDK papers covered here, with 31 questions across 15 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 COMEDK?

Of the 31 questions analysed for this chapter, 45% are easy, 42% moderate and 13% tough. 2015 had the most, with 7 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):

  • Nitrogen and Its Compounds - 8 questions (26%)
  • Phosphorus and Its Compounds - 8 questions (26%)
  • Halogens and Its Compounds - 6 questions (19%)
  • Nitrogen and Its Compounds has produced the most tough questions (2).
6.Is p Block Elements (Group 15, 16, 17 & 18)'s weightage in COMEDK going up or down?

Across all 15 papers analysed, p Block Elements (Group 15, 16, 17 & 18) has averaged about 2.1 questions per paper. In the last three years (2024–2026), that average has fallen, at about 1.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.