Stoichiometry Chapter MCQs - Set 17 - ObjectiveBooks
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# Practice Test: Question Set - 17

1. The elevation in boiling point of a solution is proportional to the ________ of the solution.
(A) Molal concentration
(B) Reciprocal of the molal concentration
(C) Normality
(D) Molarity

2. Size range of the colloids particles is
(A) 5 - 200 milli-microns
(B) 50 - 200 microns
(C) 500 - 1000 microns
(D) 10 - 50 Angstrom

3. In case of a ternary system involving two liquid components and a solute, the ratio of the concentration of the solute in the two phases at equilibrium is called the distribution co-efficient. The distribution co-efficient depends upon the
(A) Solute concentration
(B) Temperature
(C) Both (a) & (b)
(D) Neither (a) nor (b)

4. Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m3. The diffusivity of aniline in air is 0.74 × 10-5m2/s. The numerical value of mass transfer co-efficient is 7.4 × 10-3. The rate of evaporation of aniline is 2.97 × 10-4. Its units are
(A) mole/s
(B) mole/cm2.s
(C) mole/m2 .s
(D) k.mole/m2.s

5. ________ kg of CaC03 on heating will give 56 kg of CaO.
(A) 56
(B) 100
(C) 144
(D) 1000

6. The activity co-efficient of a solution, which accounts for the departure of liquid phase from ideal solution behavior
(A) Measures the elevation in boiling point
(B) Is not dependent on the temperature
(C) Is a function of the liquid phase composition
(D) Measures the depression in freezing point

7. In a binary liquid solution of components ‘A’ and ‘B’, if component ‘A’ exhibits positive deviation from Raoult's law, then component ‘B
(A) Exhibits positive deviation from Raoult's law
(B) Exhibits negative deviation from Raoult's law
(C) Obeys Raoult's law
(D) May exhibit either positive or negative deviation from Raoult's law

8. Percentage saturation of a vapor bearing gas is always _________ the relative saturation.
(A) Higher than
(B) Smaller than
(C) Equal to
(D) Either (a) or (b); depends on the system

9. One Newton is equal to ________ dynes.
(A) 102
(B) 103
(C) 104
(D) 105

10. The temperature at which the second Virial co-efficient of a real gas is zero is called the
(A) Eutectic point
(B) Boyle temperature
(C) Boiling point
(D) Critical temperature

11. For a given mass of a gas at constant temperature, if the volume 'V' becomes three times, then the pressure 'P' will become
(A) P/3
(B) 3P
(C) 9P2
(D) 9P

12. Atoms of the same element, but of different masses are called
(A) Isobars
(B) Isotones
(C) Isotopes
(D) None of these

13. The pressure of 'V' liters of a dry gas is increased from 1 to 2 kgf/cm2 at a constant temperature. The new volume will become
(A) V/2
(B) 2V
(C) V/4
(D) V2

14. The latent heat of vaporization
(A) Decreases with increased temperature
(B) Decreases as pressure increases
(C) Becomes zero at the critical point
(D) All (a), (b) & (c)

15. Osmotic pressure of a dilute solution of a non volatile solute in a solvent obeying Raoult's law is proportional to the
(A) Temperature
(B) Volume of solution
(C) Moles of non-volatile solute
(D) None of these

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