Answer:
(a) Alloys are homogeneous mixtures of metals, because
(i) it shows the properties of its constituents, and
(ii) it has variable composition., e.g., brass is
considered a mixture, because it shows the properties of its constituents,
copper and zinc, and it has a variable composition (amount of Zn in brass can
vary from 20 to 35 per cent).
(b) A solution is generally a liquid, not always. It may
involve solids and gases also, e.g., alloys are solution of solid in solid. Air
is solution of gases in gases.
(c) Colloidal solutions are heterogeneous in nature,
though they appear to be homogeneous,
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