How is a compound different from a miture?

A compound cannot be seperated by physical methods unlike a mixture

Explanation:

A compound is a substance which contains two or more elements chemically combined together. An example is sodium chloride (NaCl), and it cannot be seperated into sodium and chlorine by physical methods

A mixture, on the other hand, contains two or more substances which can be easily separated by physical methods. An example of mixture is blood

Blood can be separated into serum and blood cells by centrifugation unlike sodium chloride.

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)