Question

The H2CO molecule has ____ sigma bond(s) and ____ pi bond(s).

A.3, 1
B.3, 2
C.1, 3
D.2, 2
E.2, 1

Answer 1

In H₂CO, there are three sigma (σ) bonds and one pi (π) bond; thus, the correct answer is A.3, 1.

Step-by-step explanation:

The molecule H₂CO (formaldehyde) has three sigma (σ) bonds and one pi (π) bond. One σ bond is between the carbon and each of the two hydrogens, and the third σ bond is between the carbon and the oxygen. The double bond between carbon and oxygen consists of one σ bond and one π bond.

Let's analyze the bonding in H₂CO:

• There is a sigma (σ) bond between each hydrogen atom and the carbon atom. So, there are two sigma bonds due to the H-C bonds.
• There is a sigma (σ) bond between the carbon and oxygen atoms.
• There is a pi (π) bond between the carbon and oxygen atoms. Pi bonds typically form when there is a double bond between carbon and oxygen.

Therefore, the correct answer is A.3, 1.