JEE Advanced · 2015 · 24 May 2015 · Paper 1 · Chemical Bonding and Molecular Structure

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The total number of lone pairs of electrons in is

Answer: 8

Solution

The structure of is . Counting lone pairs:
  • Terminal oxygen atoms (2): each has 2 lone pairs = 4 lone pairs
  • Central oxygen: 2 lone pairs
  • Nitrogen atoms (2): each has 1 lone pair = 2 lone pairs

Total = 4 + 2 + 2 = 8 lone pairs.

JEE Advanced · 2015 · 24 May 2015 · Paper 1 · Integer answer

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