Class 12 Chemistry
Chapter 2 - Solutions
(Magical Series) Very Important Questions Set 1
Q.1. Define Molarity (M).
Q.2. Define Molality (m).
Q.3. State the main advantage of molality over molarity as the unit of concentration.
Q.4. Define Mole fraction.
Q.5. Explain the Henry's law about dissolution of a gas in a liquid.
Q.6. State important applications of Henry's law.
Q.7. Aquatic animals are more comfortable in cold water than in warm water.
Q.8. Calculate the molarity of 9.8% (w/w) solution of H2SO4 if the density of the solution is 1.02 g mL–1. (Molar mass of H2SO4 = 98 g mol–1).
[Ans: 1.02 M]
Q.9. Differentiate between molarity and molality of a solution. How can we change molality value of a solution into molarity value?
Q.10. A solution of glucose (molar mass = 180 g mol–1) in water is labelled as 10% (by mass). Calculate molality and molarity of the solution. (Density of solution = 1.2 g mL–1).
[Ans: 0.62 m, 0.66 M]
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