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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
p Block Elements (Group 13 & 14)

NTA Abhyas 2020 · Chemistry · p Block Elements (Group 13 & 14)

Total number of Boron atoms in anionic part of borax which...

Total number of Boron atoms in anionic part of borax which participate in back bonding.Total number of Boron atoms in anionic part of borax which participate in back bonding.

Options

  1. A3
  2. B4
  3. C2
  4. DNone of these

Correct answer

C. 2

Step-by-step solution

Borax 2Na+[B4O5(OH)4]2−.8H2O2Na^{+} [ {B}_{4}{O}_{5} ( OH{)}_{4}{]}^{2 -}. 8{H}_{2}O
Total number of Boron atoms in anionic part of borax which participate in back bonding.
sp2sp^{2} hybridised boron atoms only participate in pπ-pπp\pi\text{-p}\pi back bonding as they have vacant p-orbitals.
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