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p-Block Elements (Group 15–18)

Previous year questions with solutions · 2019 – 2026

10Questions
6Papers covered
8.82% ↓5.9%Weightage in 2026
’24
’25
’26
Year-wise statistics questions · papers · average per paper · weightage
YearQuestionsPapersAvg / paperWeightage
2026321.58.82% ↓5.9%
2025321.59.38% ↓20.3%
202442211.76%

4 questions · newest paper first

1

The heating of NH4NO2 at 60−70 °C and NH4NO3 at 200−250 °C is associated with the formation of nitrogen containing compounds X and Y, respectively. X and Y, respectively, are

  1. N2 and N2O
  2. NH3 and NO2
  3. NO and N2O
  4. N2 and NH3
JEE Advanced 2025 Paper 1
2

The complete hydrolysis of ICl, ClF3 and BrF5, respectively, gives

  1. IO-, ClO2- and BrO3-
  2. IO3-, ClO2- and BrO3-
  3. IO-, ClO- and BrO2-
  4. IO3-, ClO4- and BrO2-
JEE Advanced 2025 Paper 2
3

At room temperature, disproportionation of an aqueous solution of in situ generated nitrous acid (HNO2) gives the species

  1. H3O+, NO3- and NO
  2. H3O+, NO3- and NO2
  3. H3O+, NO- and NO2
  4. H3O+, NO3- and N2O
JEE Advanced 2024 Paper 1
4

The species formed on fluorination of phosphorus pentachloride in a polar organic solvent are

  1. [PF4]+[PF6]- and [PCl4]+[PF6]-
  2. [PCl4]+[PCl4F2]- and [PCl4]+[PF6]-
  3. PF3 and PCl3
  4. PF5 and PCl3
JEE Advanced 2024 Paper 2