What is the purpose of separation?

Online Answer
Hence, we need to separate both from each other. Thus, separation of substances is necessary to obtain pure substances for domestic purposes, industrial purposes and research work. Even the example used earlier of gases present in air is also an example of obtaining pure substances..
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Both red and white wine can be kept frozen and it is a good way of making use of leftover wine, though we would only recommend using it for cooking once it has been frozen. ... There is no need to defrost the wine before using. As it not fully frozen it will thaw almost as soon as it hits the hot pan or liquid.