Surface Chemistry  MCQs

MCQs of Surface Chemistry

Showing 11 to 20 out of 203 Questions
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11.
Which statement is correct for physical adsorption ?
(a) It is slow or fast process
(b) The value of adsorption enthalpy is low
(c) Unimolecalar layer is formed on the adsorbent
(d) Generally results at high temperature
Answer:

Option (b)

12.
What is used for 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)

13.
Which of the following gaseous molecule has maximum physical adsorption enthalpy ?
(a) Ne
(b) H2O
(c) H2
(d) C2H6
Answer:

Option (b)

14.
Mention the Freundlich adsorption isotherm.
(a) xm = Kpn
(b) xm = Kpn2
(c) xm = Kp1n
(d) mx = pKn
Answer:

Option (c)

15.
Which equation is applicable to Langmuir adsorption isotherm at low pressures ?
(a) xm = ba
(b) xm = ap
(c) xm = 1np
(d) xm = ab
Answer:

Option (b)

16.
Which of the following is applicable to Langmuir adsorption isotherm when derived ?
(a) The random motion of molecules of gas
(b) Kinetic theory of gases
(c) Magnitude of adsorption of gas
(d) All the given
Answer:

Option (b)

17.
What is called the substance which increases the rate of chemical reaction but does not take part in the reaction ?
(a) Adsorbent
(b) Catalyst
(c) Adsorbate
(d) Reactant
Answer:

Option (b)

18.
Which type of catalyst is used in obtaining SO3 gas required in obtaining sulphuric acid by Lead chamber process ?
(a) Homogeneous catalyst
(b) Heterogeneous catalyst
(c) Catalyst is not used
(d) Vanadium pentoxide
Answer:

Option (a)

19.
Which catalyst is used in the reaction of preparing vegetable ghee from vegetable oil ?
(a) Iron powder
(b) Zinc powder
(c) Raney nickel
(d) Vanadium pentoxide
Answer:

Option (c)

20.
On what does shape-selective catalytic reaction depend ?
(a) Molecules of product
(b) Size of reactant
(c) Porosity of catalyst
(d) All the given
Answer:

Option (d)

Showing 11 to 20 out of 203 Questions
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