22. Typically, the rate of oxidation can be slowed by:
Answer: C
The rate of oxidation can be slowed by refrigeration.
Refrigeration effectively slows down the rate of oxidation by reducing the temperature, which in turn slows down the chemical reactions involved in the oxidation process.
A) alligation.
Alligation is a method used in mathematics and finance to find a mean price or ratio between different quantities. It does not relate to chemical processes or the rate of oxidation, making this option incorrect.
B) distillation.
Distillation is a process used to separate mixtures based on differences in boiling points. While it can purify substances, it does not inherently slow down oxidation, thus rendering this option incorrect.
C) refrigeration.
Refrigeration is effective in slowing down oxidation because lower temperatures decrease the kinetic energy of molecules, leading to slower reaction rates. This makes refrigeration the correct choice for minimizing oxidation.
D) expiration.
Expiration refers to the end of the shelf life of a product, often indicating that it is no longer safe to consume. It does not slow down oxidation; rather, it signifies that oxidation may have already occurred, making this option incorrect.
Conclusion
Refrigeration is the only method listed that directly impacts the rate of oxidation by controlling the temperature and thereby the reaction rates. All other options fail to provide a mechanism for slowing oxidation, highlighting refrigeration as the most effective and relevant choice in this context.