Classify the following as pure substances or mixtures. Separate the pure substances into elements, compounds and divide the mixtures into homogenous and heterogenous :
(i) Air (ii) Milk (iii) Graphite (iv) Gasoline (v) Diamond (vi) Tap water (vii) Distilled water (viii) Oxygen (ix) Brass (x) 22 Carat gold (xi) Steel (xii) Iron (xiii) Sodium chloride (xiv) Iodised table salt.

Explanation

`{:((i),"Air",:,"Mixture (Homogeneous)"),((ii),"Milk",:,"Mixture (Homogeneous)"),((iii),"Graphite",:,"Pure substance (Element)"),((iv),"Gasoline",:,"Mixture (Homogeneous)"),((v),"Diamond",:,"Pure substance (Element)"),((vi),"Tap water",:,"Mixture (Homogeneous)"),((vii),"Distilled water",:,"Pure substance (Compound)"),((viii),"Oxygen",:,"Pure substance (Element)"),((ix),"Brass",:,"Mixture (Homogeneous)"),((x),"22 Carat gold",:,"Mixture (Homogeneous)"),((x i),"Steel",:,"Mixture (Homogeneous)"),((x ii),"Iron",:,"Pure substance (Element)"),((x iii),"Sodium chloride",:,"Pure substance (Compound)"),((x iv),"Iodized table salt",:,"Mixture (Heterogeneous)"):}`