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MHT CET202523 Apr 2025Morning ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Identify from following compounds that valence shell of 'Xe' consists one lone pair of electrons.

Options

  1. AXeF ₂
  2. BXeF ₄
  3. CXeOF ₂
  4. DXeOF ₄

Correct answer

D. XeOF ₄

Step-by-step solution

Valence shell electron counting determines lone pairs on xenon. Xenon has 8 valence electrons. Each single bond contributes 1 electron to bonding, while double bonds contribute 2. For D) XeOF ₄ , the bonding electron count is 4 1 + 1 2 = 6 . Non-bonding electrons are 8 - 6 = 2 , forming 2 / 2 = 1 lone pair. The central Xe atom in XeOF ₄ contains exactly one lone pair.

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