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a
All B – H – B angles are of 120°
b
The two B – H – B bonds are not of same length.
c
Its fragment, BH3 behaves as a Lewis base.
d
Terminal B – H bonds have less p – character when compared to bridging bonds.
answer is D.
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Detailed Solution
B-H[terminal] having less p character as compared to bridge bond.B-H-B bridge bond having same bond length. B-H-B Bond angle = 90°BH3is acts as lewis acid.