It is a homogeneous mixture composed of only one phase.
ex:
1) Salt water
2) Syrup (sugar in water)
3) Vinegar (acetic acid in water)
4) Vodka (ethanol in water)
5) Varnish (various resins dissolved in solvent, often white spirit)
6) Paper glue (usually polyvinylacetate dissolved in water)
7) Shampoo (various soaps and surfactants dissolved in water)
8) Bronze (copper dissolved into tin and then cooled)
9) Fizzy water (carbon dioxide in water)
10) Windscreem washer fluid (methanol and ethanol in water, with other additives)
