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JEE Main 202125 FebruaryMorning Shift
Exam
JEE Main
Year
2021
Date
25 February
Shift
Morning Shift
Subject
Chemistry
Chapter
p Block Elements (Group 13 & 14)

JEE Main 2021 · 25 February · Morning Shift · Chemistry · p Block Elements (Group 13 & 14)

The incorrect statement about B _ 2 H _ 6 is :

The incorrect statement about B2H6{B}_{2}{H}_{6} is :The incorrect statement about B _ 2 H _ 6 is :

Options

  1. AAll B−H−BB - H - B angles are of 120°120 °
  2. BThe two B−H−BB - H - B bonds (bridged and terminal) are not of same length.
  3. CTerminal B−HB - H bonds have less pp -character when compared to bridging bonds.
  4. DIts fragment, BH3,{BH}_{3}, behaves as a Lewis acid.

Correct answer

A. All B−H−BB - H - B angles are of 120°120 °

Step-by-step solution

The incorrect statement about B _ 2 H _ 6 is :

θ2>θ1,∴B−H{\theta}_{2} > {\theta}_{1}, ∴ B - H (terminal) having less pp
character as compare to bridge bond.

Both B−H−BB - H - B (bridge bond and terminal bond) do not have same bond length.

B−H−BB - H - B bond angle is ≈90°\approx 90 °

BH3{BH}_{3} is electron deficient species and therefore acts as Lewis acid

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