Question

Which of the following is to a mixture?

(a) air
(b) sea water
(c) pure water
(d) soil

Answer 1

(c) pure water
Pure water comprises 2 atoms of hydrogen and 1 atom of oxygen combined chemically in a fixed ratio. This hydrogen and oxygen can be later split by chemical means. Also, pure water has dissimilar properties from its constituents; thus, pure water is a compound and not a mixture.