Question

how to determine the number of sigma bonds in the following;)

Answer 1

hai friend,

The first bond between two atoms is sigma bond
the other bonds are pi bonds

sigma bonds -5
pi bonds -4

hope helped !!

Answer 2

In the picture one is sigma bond in the double bond.
After completing the valency of carbon the all H atoms are linked by sigma bonds so overall sigma bonds will be
9.
# Hope it helps.