1. The atmospheric pollution is generally measured in the units of
(a) mass percentage
(b) volume percentage
(c) volume fraction
(d) ppm
(d) ppm
2. Temperature dependent term among the following is -
(a) Molality
(b) Molarity
(c) Mole fraction
(d) Weight percentage
(b) Molarity.
3. The law which indicates the relationship between solubility of a gas in liquid and pressure is
(a) Raoult's law
(b) Henry's law
(c) Lowering of vapour pressure
(d) Van't Hoff law
(b) Henry's law
4. Partial pressure of a solution component is directly proportional to its mole fraction. This is known as
(a) Henry's law
(b) Raoult's law
(c) Distribution law
(d) Ostwald's dilution law
(b) Raoult's law
2. Temperature dependent term among the following is -
(a) Molality
(b) Molarity
(c) Mole fraction
(d) Weight percentage
(b) Molarity.
6. The system that forms maximum boiling azeotrope is
(a) Acetone-chloroform
(b) ethanol-acetone
(c) n-hexane-n-heptane
(d) carbon disulphide-acetone
(a) Acetone-chloroform.
7. A plant cell shrinks when it is kept in a
(a) hypotonic solution
(b) hypertonic solution
(c) isotonic solution
(d) pure water
(b) hypertonic solution
8. The osmotic pressure of a solution can be increased by
(a) increasing the volume
(b) increasing the number of solute molecules
(c) decreasing the temperature
(d) removing semipermeable membrane
(b) increasing the number of solute molecules.
9. Sprinkling of salt helps in clearing the snow-covered roads in hills. The phenomenon involved in the process is
(a) lowering in vapour pressure of snow
(b) depression in freezing point of snow
(c) melting of ice due to increase in temperature by putting salt
(d) increase in freezing point of snow
(b) depression in freezing point of snow
10. The Van't Hoff factor [i] for a dilute aqueous solution of the strong electrolyte barium hydroxide is?
(a) 0
(b) 1
(c) 2
(d) 3
(d) 3.
