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Answer 1st :-
When you see distilled water (H2O), it's a pure substance. That means that there are only water molecules in the liquid. A mixture would be a glass of water with other things dissolved inside, maybe one of those powders you take if you get sick. Each of the substances in that glass keeps its own chemical properties.
Answer 2nd :-
Generally tap water contains some dissolved solids, other than water, so generally tap water is not a pure compounds, or a pure substance. ... It's actually relatively hard to keep water purified because it's so good at dissolving stuff. Hence its a mixture.
Answer 3rd :-
A compound is a pure substance composed of two or more different atoms chemically bonded to one another. That means that it can not be separated into its constituents by mechanical or physical means and only can be destroyed by chemical means.
Answer 4th :-
Saltwater is a homogeneous mixture, or a solution.
Answer 5th :-
Iron particles in a mixture of iron and sulphur are attracted by a magnet. ... But iron sulphide is a compound formed from iron and sulphur. The properties of the constituent elements are lost when a compound is formed. So, the iron particles in iron sulphide are not attracted by a magnet.
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