MCQ
The shape of ethane is
- ATriangular
- ✓Tetrahedral
- CLinear
- DNone of these
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$CH _{3} CH = CHCH \left( CH _{3}\right)_{2} \stackrel{ HBr }{\longrightarrow}$

$B, C, N, S, O, F, P, Al, Si$

$1.$ Boron is approximately $sp^3$ hybridized
$2.$ $B-H-B$ angle is $180^o$
$3.$ There are two terminal $B-H$ bonds for each boron atom
$4.$ There are only $12$ bonding electrons available
Of these statements