PHARMACEUTICS MCQS

            PHARMACEUTICS MCQS

1.    When a non volatile solute is added to the solvent,then the rate of evaporation of a solvent in a solution …..

A.increases. B.decreases . C. remains constant. D. none.

2.    when glycerin(C3H8O3) is added to pure solvent then the vapour pressure of a solvent in a solution will:

A.increases.B.decreases. C.remains same. D. none

3.    the sum of the mole fractions is equal to:

A.zero. B. unity. C. x1/x1+x2  D. x2/x2-x1 .

  4. when ethanol is added to water form a solution,what is its deviation from raoult,s law:,

 A.negative B.positive c.obey raoult,s law. D. all

5. What is the relation between vapour pressure and boiling point;

A. inverse. B.direct. C. no relation D. 1 : ½ .

6. Water in a beaker starts boiling when vapours pressure becomes equal to;

A.rate of evaporation B.atmospheric pressure. C.atmospheric boiling point.

D. atmospheric temperature.

7. Heterogenous mixture is one in which particles have ;

A. maintain one phase. B. particles have uniform appearance. C.commonly reffered as solution. D. none of the above

8. Molality of the solution prepared by dissolving 5gram of toluene(C&H8) in 250gram of benzene(C6H6) ;

A. 0.87moles/kg B. 0.217 moles/kg C. 2.4molds/kg D. 7.11 moles/kg.

9. A solution in which particles size is less than 1nm is;

A. colloidal solution B. coarse dispersion C. no solution. D.none of the above.

10. The forces between solvent-solute is ;

A. Cohesive forces B. Adhesive forces C. both a&b. D. depends on particles size.

11. Hydrogen in palladium solution is example of;

A. liquid_solid B. solid_liquid C. Gas_solid D.none.

12. The attractive forces between components of real solution are;

A.same B. different C. very very low D.depends of conditions.

13. In azeotropic mixture showing positive deviation from Raoult,s law,the volume of mixture is ;

A. slightly more than the total volume of components.

B.slightly less than the total volume of components.

C. equal to total volume of component.

D. none.

14. collogative properties are properties of;

A. dilute solution which behave as nearly ideal solution. B.vconcentration solution which behave as nearly non ideal.

C. both a& b D. neither A& b.

15.  Colligative properties are used to calculate;

A.molar mass. B. Boiling point. C. vapour pressure D.both B & C.

16. For a liquid to be vapourise, the most necessary thing is ;

A.heat.22 B. pressure. C. space. D.both A&B.

17. If solution has low concentration of solute then it is called ;

A. dilute B. concentration C. saturated . D. supersaturated.

18. Solution have _____________ main components.

A. 1. B.2  C.3 D.4

19. Solute which is ionized in solution & conduct electricity is called;

A. Electrolyte B. Non electrolyte C.suspension . D.none.

20. Nacl is____________;

A.strong electrolyte B. weak electrolyte. C. non electrolyte. D.All.

21. Soda water (CO2 in H2O) is example of .

A. gas liquid solution. B. Liquid liquid solution. C. solid liquid solution. D. liquid solid solution.

22. Types of dispersion on basis of size of dispersed particles is;

A.2 B.3 C. 5 D.7

23. Particle size in true solution is ;

A. less than 1nm .B. greater than 1nm .C. 1nm .D. 500nm.

24.particle size in colloidal dispersion is between ;

A)1nm & 500nm B) 500nm & 1000nm C) 0 &1nm D) 1500nm & 2500nm.

25. Enthalpy of solution can be positive in;

A) exothermic reaction B) endothermic reaction C) neutral D)none

26. Forces between 2 similar molecules is ;

A) cohesive B) adhesive C) both D)None

27) If enthalpy of solution is zero then these solutions are called…;

A) ideal B) real C) both D) none

28. solution which obey raoult,s law is ;

A) real B) ideal C) not solution D) all.

29. Mathematical form of raoult,s law is;

A) P=P*X . B) P*=PX . C) X=P*P . D) P=PP*X

30) When adhesive forces are greater than cohesive than its deviation is;

A) negative B)positive C) no deviation D) both A&B.

31) Solutions in which cohesive forces are greater than adhesive forces deviates;

A) negative B) positive C) no deviation D) both A &B.

32) The higher the vapour pressure of a liquid at a given temperature,the boiling point of liquid will be ;

 A

33. The higher the external pressure,the B.P of a liquid will be ;

A) higher B) lower C) not changed D) none.

34. Addition of non volatile solute to a solution_____________ freezing points relative to pure solvent.

A) lower B) higher C) none D) both A&B.

35.Apparatus used for measurement of freezing point depression is;

A) Beckmann apparatus B) barometer C) monometer D)cottrel,s apparatus.

36) Osmosis is the net flow of asolvent between 2 solutio separated by a ;

A) semipermeable membrane B)permeable membrane C) impermeable, D)all

37) Attractive forces between the cmponents of real solutions are ;

A) same B) constant C) not same D) ALL.

38) Apparatus used for measurement of elevation of B.P is;

A) cotrell,s apparatus B)Beckmann apparatus C)barometer D) none.

39) In collidial suspension particle size will be ;

A) less than 1 micron B) 1 micron C) greater than 1 micron D) zero.