Is in aerobic respiration glucose oxidised to ethanol?

No, in aerobic respiration, glucose is oxidized to carbon dioxide and water. During this process, oxygen is consumed as the final electron acceptor.

Aerobic respiration is represented by the following chemical equation:

$$C_6H_{12}O_6 + 6O_2 → 6CO_2 + 6H_2O + energy$$

In contrast to aerobic respiration, the process you are referring to is called fermentation, where glucose is partially oxidized in the absence of oxygen, resulting in the production of ethanol and carbon dioxide. Fermentation occurs in certain microorganisms, such as yeast, under anaerobic conditions when oxygen is limited or absent.