- How to I neutralize the smell of (VERY) spoiled milk
- How do I make slightly sour milk palatable again?
These 2 questions were asked recently. IMO, the answer should be "Don't do such things! Just throw it and buy a new one. These habits are unhealthy and unhygenic". The OPs are "apparently" seeking "some chemical methods" which makes the questions apparently chemistry related. But, I don't think these are full-fledged chemistry questions. Even if it is a chemistry question, it might get closed as the questions are kind of "opinion-based" (as OPs are seeking advice, thus the answers will vary according to the answerer's opinions), ultimately making them off-topic.
Now, the tags food-chemistry, biochemistry and smell can be appropriate for above questions but the on-topic questions of these tags here starts with "Why...?" or "What causes ...?" because the OPs are seeking for a scientific explanation on something (good examples: here and here).
So, are the said questions on-topic? If yes, why? Is cooking.SE appropriate for that?