Question

The number of sigma bonds formed between two atoms with four shared electrons are:

• A. three
• B. two
• C. one
• D. zero

Answer 1

The correct option is C one

$\bullet$ In case of multiple bonds formed between two atoms, one bond is sigma bond and the rest are pi bonds. This is because only one head-on overlapping can take place between two atoms, rest are lateral overlaps.
$\bullet$ A double bond is formed when four electrons are shared between two atoms.
$\bullet$ Thus, in a double bond one bond is a sigma bond and other is a pi bond.