Surface Chemistry  MCQs

MCQs of Surface Chemistry

Showing 41 to 50 out of 203 Questions
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41.
Which of the following is not an example of surface phenomenon?
(a) Dissolution
(b) Corrosion
(c) Electrode reaction
(d) Homogeneous equilibrium
Answer:

Option (d)

42.
The high vacuum of how many Pascal is required for obtaining completely pure surface of metals?
(a) 10-8 to 10-9
(b) 10-8 to 10-10
(c) 10-6 to 10-9
(d) 10-8 to 10-7
Answer:

Option (a)

43.
What is the phenomenon called when the molecules adsorbed on the surface are released by any reason?
(a) Sorption
(b) Desorption
(c) Adsorption
(d) Precipitation
Answer:

Option (d)

44.
Because of adsorption _____ .
(a) surface energy decreases
(b) surface energy increases
(c) the value of surface energy becomes zero
(d) no changes take place
Answer:

Option (a)

45.
By which other name the adsorption of gases on the solid surface is known?
(a) Evaporation
(b) Surface tension
(c) Condensation
(d) Sorption
Answer:

Option (c)

46.
In which of the following phases, interface is not obtained ?
(a) Liquid - liquid
(b) Solid - liquid
(c) Liquid - gas
(d) Gas - gas
Answer:

Option (d)

47.
Which of the following substance is not an adsorbent ?
(a) Sugar
(b) Clay
(c) Silica gel
(d) Alumina
Answer:

Option (a)

48.
What type of attraction forces are present between adsorbent and adsorbate in physisorption ?
(a) van der Waals’
(b) Strong chemical
(c) Gravitation
(d) Metallic bond
Answer:

Option (a)

49.
Which statement is correct for physical adsorption ?
(a) It is slow or fast process.
(b) the value of adsorption enthalpy is low.
(c) Unimolecular layer is formed on the adsorbent.
(d) Generally results at high temperature.
Answer:

Option (b)

50.
What is used for the electronic instruments so that they may not be spoiled by moisture ?
(a) Alumina
(b) Silica gel
(c) Iron powder
(d) Animal charcoal
Answer:

Option (b)

Showing 41 to 50 out of 203 Questions
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