A cumulus cloud is puffy and white.
Vinegar has a sour odour.
Water boils at 100 °C.
Each side of a cube measures 10 cm.
The above properties are all physical properties because you can observe them without changing the composition of the substances.
A mixture of baking soda and vinegar produces gas is incorrect because the baking soda changes into carbon dioxide and other substances.
Iron rusts when exposed to water is incorrect because the iron changes into rust.
