Which of the following is NOT a product of pyrolysis?

Pyrolysis is a thermochemical process where organic materials are decomposed at high temperatures in the absence of oxygen. This process generates several products including tar, oil, and syngas, which are all derivatives of the complex organic compounds that undergo thermal degradation.

Vinegar, on the other hand, is a product derived from the fermentation of ethanol or sugars by acetic acid bacteria and not from pyrolysis. During this fermentation process, ethanol is oxidized to produce acetic acid, which characterizes vinegar. While vinegar plays a significant role in food science and preservation, it is unrelated to the thermal decomposition processes involved in pyrolysis.

Therefore, the distinction lies in the fact that while tar, oil, and syngas are directly produced as a result of heating organic materials without oxygen, vinegar results from biochemical reactions, categorizing it separately from the products generated through pyrolysis.