Pick the correct statement about pure substance.
1
A mixture of liquid air and gaseous air is a pure substance.
2
A mixture of ice and liquid water is not a pure substance.
3
A mixture of two or more phases of pure substance is not a pure substance even though the chemical composition of all the phases is the same throughout
4
A mixture of two or more phases of pure substance is still a pure substance as long as the chemical composition of all the phases is the same throughout
5
Question Not Attempted