Question

How many sigma and pi bonds are there in ethyne??

Answer 1

hope it helps
2→pi bonds
1→sigma bond

Answer 2

ethyne has 3 sigma and two pie bonds:

H-C≡C-H ⇒Ethyne

Bond between carbon and hydrogen is sigma plus one sigma between th etwo carbons.
Between the two carbons there are two pie bonds.

hope it helped u..