Answer: The given statement is false.
Explanation:
A single bond is defined as the bond through which two same or different atoms are combined to each other by a single line. It is represented by a hyphen.
For example, C-H shows that both carbon and hydrogen atoms are attached to each other through single bond.
It is not necessary that all the molecules contain a single bond. This is because there are molecules which contain a double or triple bond also.
For example, [tex]H_{2}C=CH_{2}[/tex] is ethene molecule and it contains a double bond.
Therefore, we can conclude that the statement all molecules contain only single bond, is false.
