Page 93 - Chemistry ICSE Class IX
P. 93
Water 81
–6
(c) 10 m
(d) 10 –10 m
(v) A solution which can dissolve more of the solute is called
(a) saturated solution
(b) unsaturated solution
(c) supersaturated solution
(d) none of these
(vi) The solubility of a gas in a liquid
(a) decreases with a rise in temperature
(b) increases with a rise in temperature
(c) decreases with an increase in pressure
(d) increases with a decrease in pressure
(vii) Which of the following occurs as a hydrated salt?
(a) potassium chloride
(b) sodium nitrate
(c) potassium sulphate
(d) copper sulphate
(viii) Where do the metals which can displace hydrogen from water at room temperature appear in the reactivity
series?
(a) at the top
(b) at the bottom
(c) in the middle
(d) next to hydrogen
2+
2+
(ix) The reaction Cu (aq) + Zn(s) o Zn (aq) + Cu(s), indicates that the metal which appears lower in the
reactivity series is
(a) Zn
(b) Cu
2+
(c) Zn
2+
(d) Cu
Answers
(i) (b) (ii) (d) (iii) (a) (iv) (d) (v) (b) (vi) (a) (vii) (d) (viii) (a) (ix) (b)
