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Question


The molecular shape of diborane is shown:
Consider the following statements for diborane

1. Boron is approximately sp3 hybridised
2. B-H-B angle is 180
3. There are two terminal B-H bonds for each boron atom
4. There are only 12 bonding electrons available

Out of these statements:

258367.png

A
1, 3 qnd 4 are correct
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B
1, 2 and 3 are correct
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C
2, 3 and 4 are correct
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D
1, 2 and 4 are correct
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Solution

The correct option is A 1, 3 qnd 4 are correct

The structure of diborane is shown in fig.

The four-terminal hydrogen atoms and the two boron atoms lie in one plane.
Above and below this plane, there are two bridging hydrogen atoms.
The four-terminal B-H bonds are regular two centre-two electron bonds while the two bridge (B-H-B) bonds are different and can be described in terms of three centre - two e bonds.

Hence, the correct option is A

355272_258367_ans.jpg

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