Based on VSEPR Theory (Valence Shell Electron Pair Repulsion Theory) the electron clouds on the atoms around the C will repel each other. As a result they will be pushed apart giving the molecule a linear molecular geometry or shape. The C2H2 bond angle will be 180 degrees since it has a linear geometry.
Hereof, what is the structure of Ethyne?
What is the shape of acetylene molecule?
Pure acetylene is odorless, but commercial grades usually have a marked odor due to impurities. As an alkyne, acetylene is unsaturated because its two carbon atoms are bonded together in a triple bond. The carbon–carbon triple bond places all four atoms in the same straight line, with CCH bond angles of 180°.
How many sigma and pi bonds are there in c2h2?
So basically, this the linear structure of Acetylene (which is a common name) for Ethyne has three sigma and two pi bonds. Three sigma bond calculation: C-H.