Answer: Nitrogen normally exists as two-atom molecules in the form of a gas at room temperature.
Explanation:
1. covalent bonds are strong
2. hydrogen bonds are weak
3. Ionic bonds are weak
Among the choices, the best answer is alcohol. However, the most common groups of organic compounds in fuels are the alkanes and alkenes. Alcohol can also be used in fuel, especially bioethanol. Bioethanol is a common additive in fuels for motor vehicles, and is made from corn or sugar.