Question 3
(a) What are insoluble substances?
(b) Name a few solid substances that are insoluble in water.
(c) Name a few liquid substances that are insoluble in water.
name two gases which dissolve in water
Name the two gases from which water is formed. What is the chemical composition of these two gases in water ? Give the molecular formula of water.
Name :
(a) a chloride which is insoluble in cold water but dissolves in hot water,
(b) a chloride which is insoluble,
(c) two sulphates which are insoluble,
(d) a basic salt,
(e) an acidic salt,
(f) a mixed salt,
(g) a complex salt,
(h) a double salt,
(i) a salt whose solubility increases with temperature,
(j) a salt whose solubility decreases with temperature.
Figure A shows water with some impurities. After some time, insoluble impurities settle down. Name the separation technique by which insoluble impurities are separated.