Adsorption Isotherm
The surface area that is occupied by a single gas molecule is inversely proportional to which of the following?
(A). Â Molar mass of the gas adsorbed
(B). All of the mentioned
(C). Â Volume of the gas
(D). Â Â Density of the liquefied gas
(E). None of these
Multiple Choice Question Answer: Â d
which of the following is the total surface area that is covered by all the molecules of the adsorbed gas?
(A).   S = nβ/NA
(B).  S = βNA/n
(C).  S = nβNA
(D).  S = NA/nβ
(E). None of these
Multiple Choice Question Answer: Â a
When the B.E.T. theory was proposed?
(A). Â 1940
(B). Â 1935
(C). Â 1945
(D). Â 1938
(E). None of these
Multiple Choice Question Answer: Â d
An assumption for B.E.T theory is __________
(A). Â All of the mentioned
(B). Â The adsorption at one site never affects the adsorption at the neighbouring site
(C). Â Physical adsorption of adsorbate is always occurred resulting in the formation of the multilayers
(D). Â Solid surface possess uniform, localised sites
(E). None of these
Multiple Choice Question Answer: Â a
which of the following is the energy of adsorption in the first layer?
(A). Â Increasing
(B). Â Constant
(C). Â Decreasing
(D). Â None of the mentioned
(E). None of these
Multiple Choice Question Answer: Â a
The B.E.T. theory was based on which of the following?
(A). Â Multilayer adsorption
(B). Single layer adsorption
(C). Â Double layer adsorption
(D). Â None of the mentioned
(E). None of these
Multiple Choice Question Answer: Â a
According to the B.E.T. equation, what will the plot of P/V(P0-P) versus P/P0 yield?
(A). Â Hyperbola
(B). Â Parabola
(C). Â Straight line
(D). Â Eclipse
(E). None of these
Multiple Choice Question Answer: Â c
The surface area available for the nth layer is equal to the coverage of which of the following layer?
(A). Â nth layer
(B). Â (n+1)th layer
(C). Â (n-1)th layer
(D). Â none of the mentioned
(E). None of these
Multiple Choice Question Answer: Â c
In the B.E.T. equation, the p0 denotes _____________
(A). Â The Saturated vapor pressure of gas molecules
(B). Â The Unsaturated vapor pressure of gas molecules
(C). Â Pressure of the gas molecules
(D). Â All of the mentioned
(E). None of these
Multiple Choice Question Answer: Â d
The B.E.T. theory is used in calculating which of the following?
(A). Â Surface area of adsorbate
(B). Â Surface area of adsorbents and catalyst
(C). Surface area of adsorbent only
(D). Â None of the mentioned
(E). None of these
Multiple Choice Question Answer: Â b
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