Question

Which are mixtures &pure substances sea water gasoline skin crusty nail textbooks page diamond

Answer 1

Solution:  

• Seawater: A mixture of dissolved organic and inorganic compounds, solid particulates, biologic organisms and remains, and some gases.

• Gasoline: A homogenous mixture of petroleum compounds or hydrocarbons (lightweight – C4-C12) with alkanes like paraffin, alkenes like olefin etc.

• Skin: A complex mixture of many substances like carbohydrates, lipids and fatty acids, proteins like pigments, multiple minerals, organic compounds like esters etc.

• A rusty nail: A mixture of iron and oxygen since the iron gets oxidized in the presence of moisture

• A page of the textbook: A mixture of many elements or chemicals that are used for making the paper, ink, adhesives, for printing and binding etc

• Diamond: is a pure substance since it is made up of molecules of a single type which is carbon molecules.