Question

which of these contains a second order covalent bond?
nh₃
h₂
n₂
co₂

Explanation:

• In \(NH_3\), there are single covalent bonds (\(N - H\)).
• In \(H_2\), there is a single covalent bond (\(H - H\)).
• In \(N_2\), there is a triple covalent bond (\(N\equiv N\)) which is a third - order bond.
• In \(CO_2\), the carbon - oxygen bonds are double covalent bonds (\(C = O\)). A double bond is a second - order covalent bond.

Answer:

\(CO_2\)