Question

Which types of bonds are present between two carbon atoms in an acetylene molecule?

• A. Two sigma bonds and one pi bond
• B. Three sigma bonds
• C. One sigma bond and two pi bonds
• D. Three pi bonds

Answer 1

The correct option is C One sigma bond and two pi bonds

Acetylene is the simplest member of the alkyne family. Alkynes are unsaturated hydrocarbons in which a carbon-carbon triple bond exists between the two carbon atoms.

When three pairs of electrons are shared between two carbon atoms, a triple bond between two carbon atoms is formed by one sigma and two pi bonds. The distinguishing features of alkynes from the other hydrocarbons are the triple bond which exists between the carbon atoms.