Intermolecular forces hold molecules of a substance together in a particular state of matter. In acetic (ethanoic) acid, the strongest intermolecular force is hydrogen bonding.
Hydrogen bonding leads to dimerization and high boiling points. An image showing dimerization of acetic acid is shown in the image attached.
The answer is c. number of protons and d. atomic number. The proton number can identify an element. And also the atomic number is equal to the number of protons.
In the aerobic oxidation of glucose, the electrons formed are transferred to O2 after several others transfer reactions like passing through coenzymes NAD+ and FAD