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Saturday, 31 October

JEE Main · Chemistry · The p-Block Elements

Xenon Fluorides as Fluoride Donors

JEE Main asked Xenon Fluorides as Fluoride Donors 2 times in 2 of the 108 shifts Lumi analysed, in 2020 and 2023. It belongs to Group 17 & 18, in The p-Block Elements (Chemistry). The longest wait between two years asking it was 3 years.

Updated 2026-10-24

Times asked
2
in 2 shifts
Years
2 of 8
First asked
2020
last in 2023
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020 and 2023. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.050.10’170.08’200’210’220.07’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 1 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20260 of 9
  • 20250 of 8
  • 20240 of 18
  • 20231 of 12
  • 20220 of 24
  • 20210 of 24
  • 20201 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: calculation.

  • Ionic adduct of xef4 with sbf5
  • Reaction in which hybridisation changes

Difficulty

Easy 0Medium 1Hard 1

1 of the 2 questions had a numerical answer.

Every question

All 2 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 8 Apr 2023, Shift 1 · Q88XeF4\mathrm{XeF_4} reacts with SbF5\mathrm{SbF_5} to form [XeFm]n+[SbFy]z−\mathrm{[XeF_m]^{n+}[SbF_y]^{z-}}. m+n+y+z\mathrm{m + n + y + z} = ________MediumNumerical value
  2. 4 Sep 2020, Shift 2 · Q34The reaction in which the hybridisation of the underlined atom is affected is :HardSingle correct

Shifts: 4 Sep 2020, Shift 2, 8 Apr 2023, Shift 1.

Same topic

Other ideas in Group 17 & 18

Group 17 & 18 has 17 ideas JEE Main has asked; 6 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisAll repeated ideas