Pure honey check the growth of micro organisms justify based on your knowledge in osmosis.

Heart wood is resistant to micro organisms. Justify the statement.

Check whether the following is a set? Justify your answer. The collection of all even integers

During metallurgy, the metal extracted may still contain impurities. Different methods are used to obtain pure metal from the cude sample based on the nature of the impurities present. Suggest a method for refining crude tin metal. Justify your answer.