Practice Test

1) Arne Wilhelm Kaurin Tiselius made electrophoresis a very powerful technique for studing mixtures of

2) A boundry separating two phases is called

3) Which of the following statement is NOT correct regarding the adsorption of a gas on the surface of the solid?

4) Adsorption is multilayer in case of______ adsorption.

5) The extent of physical adsorption increases with

6) Which one of the following statements is wrong?

7) Chemical adsorption

8) ______ is defined as the phenomenon of accumulation of molecules of one substance on the active surface of other substance due to unbalanced forces of attraction.

9) The substance which has a tendency to adsorb the molecules of other substance on the surface of it is called

10) Which of the following is an example of endothermic reaction?

11) _______ is the process in which adsorbate molecules are held on the adsorbent by chemical bonds.

12) The extent of physical adsorption

13) In physical adsorption, gas molecules are bound on the solid surface by

14) Physical adsorption occurs rapidly at______ temperature

15) Which one of the following is a property of physisorption?

16) Chemisorption was first considered by

17) What is true about chemical adsorption

18) Which of the following is NOT applicable to chemisorption?

19) The relationship between equilibrium pressure of a gas and its amount adsorbed on the solid adsorbent at constant temperature is called

20) The curve showing the variation of adsorption with pressure at constant temperature is called

21) Freundlich isotherm equation is not applicable at

22) Homogeneous catalysis implies that

23) A catalyst in the finely divided state is more efficient because in this state

24) Which is the characteristic of a catalyst?

25) Pick out the correct statement

26) Reaction catalyzed by heterogeneous catalysts are called

27) Which of the following catalysis can be explained by the adsorption theory?

28) The substance which do not act as catalyst but increase the activity of the catalyst are called

29) Enzymes are

30) One molecule of most of the enzymes acts on_______ reactant molecules per second.

31) Addition of 2% ethanol in chloroform when used as anaesthetic, there ethanol acts as

32) Identify the correct statement

33) Colloidal solutions are

34) The phase in which the Colloidal particles are dispersed is known as

35) Colloidal particles possess the remarkable property of adsorption which is due to

36) Electrophoresis is the migration of Colloidal particle under the influence of

37) The movement of Colloidal particles is

38) Which one of the following is NOT Colloidal in nature?

39) In lyophobic sols

40) The zig - zag movement of the Colloidal particles in a Colloidal sol was observed by

41) The zig - zag movement of the Colloidal particles in a Colloidal sol is due to

42) The stability of lyophobic colloids is due to

43) The charge on the colloidal particle can be determined by

44) Tyndall effect is shown by

45) In which one of the following properties, emulsion differ from Colloidal sols ?

46) Mist is an example of Colloidal system of

47) The ability of ion to bring about coagulation of a given Colloidal solution depends upon

48) When a Colloidal solution is observed under ultra microscope we can see

49) The number of phases in Colloidal system are

50) Which is NOT a Colloidal solution of gas in lliquid?

51) The dispersed phase in milk is

52) Which of the following is an example of Solid - Solid system ?

53) The word colloid was introduced by

54) The main difference between crystalloids and Colloids is that of

55) Smoke is an example for

56) Colloidal system of a liquid or solid dispersed in a gaseous dispersion medium is called

57) How many Colloidal system are possible?

58) When sand is stirred into water, the mixture so obtained is a

59) Clouds represent an example of dispersion of

60) Colloidal particles in a dispersion medium form

61) Coagulation of sol takes place

62) Which type of colloid is air?

63) Colloidal system of a liquid dispersed in a liquid medium is called

64) One significant difference between true solutions and colloidal suspension is that colloidal suspensions

65) Which of the following is NOT an example of macromolecular colloidal particles?

66) In case of lyophilic sol, the surface tension of the sol is

67) Lyophilic sols are more stable than lyophobic sols because

68) Which one of this is a lyophilic sol?

69) An emulsion is a dispersion of a

70) ______ is the example of oil in water emulsion

71) Water-loving colloids are called

72) An example of emulsion is

73) Hardy-Schulze law may be expressed as

74) Brownian movement is due to

75) In which of the following is Tyndall effect not observed?

76) Colloidal particles exibit Tyndall effect due to

77) Which of the following indicates the charge on colloidal particles?

78) Tyndall effect would be observed in a

79) Brownian motion shown by colloidal particle is its ________ property.

80) The random motion of colloidal particles in the dispersion medium is referred to as

81) In the adsorption of oxalic acid by activated charcoal, the activated charcoal is known as

82) How many layers are adsorbed in chemical adsorption?

83) Chloroform on oxidation by air forms

84) Which of the following is NOT a colloid?

85) Butter represents colloidal solution of

86) Sky looks blue due to

87) Which one of the following statements is wrong about physical adsorption?

88) Which of the following statements is NOT correct regarding chemical adsorption?

89) The gas which is adsorbed in minimum amount by activated charcoal is

90) Which of the following is neither an example of physical adsorption nor chemical adsorption?

91) Which of the following is an example of chemical Adsorption?

92) The heat of chemisorption is______

93) Freundlich's asorption isotherm is given by

94) Straight line in Freundlich adsorption isotherm is obtained on plotting a graph of

95) Adsorption at low pressure, according to Freundlich adsorption isotherm is proportional to

96) Enzymes have high molecular mass ranging between

97) During hydrogenation of oils, which one of the following catalyst is used?

98) In chemical reaction, catalyst

99) Identify the incorrect statement :