Which of the following is a true solution?Why?
(a)copper in gold

(b)sulphur in water

(c)milk

(d)KCl in SO2

Among this alloys are true solution. So
a) copper in gold is a true solution.
b) Sulphur in water is a colloidal solution
c) Milk is an emulsion and is a colloid
d) KCl with SO2 forms potassium sulphate which is a precipitate
 

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