Adsorption Isotherm MCQs | Chemistry

1. The surface area that is occupied by a single gas molecule is inversely proportional to which of the following?

(A) Molar mass of the gas adsorbed

(B) All of the mentioned

(C) Density of the liquefied gas

(D) Volume of the gas

2. Which of the following is the total surface area that is covered by all the molecules of the adsorbed gas?

(A) S = βNA/n

(B) S = nβ/NA

(C) S = nβNA

(D) S = NA/nβ

3. When was the B.E.T. theory proposed?

(A) 1940

(B) 1935

(C) 1945

(D) 1938

4. An assumption for B.E.T. theory is __________

(A) Physical adsorption of adsorbate is always occurred resulting in the formation of the multilayers

(B) The adsorption at one site never affects the adsorption at the neighbouring site

(C) All of the mentioned

(D) Solid surface possesses uniform, localised sites

5. Which of the following is the energy of adsorption in the first layer?

(A) Decreasing

(B) Constant

(C) Increasing

(D) None of the mentioned

6. The B.E.T. theory was based on which of the following?

(A) Multilayer adsorption

(B) Single layer adsorption

(C) Double layer adsorption

(D) None of the mentioned

7. According to the B.E.T. equation, what will the plot of P/V(P0-P) versus P/P0 yield?

(A) Straight line

(B) Parabola

(C) Hyperbola

(D) Eclipse

8. The surface area available for the nth layer is equal to the coverage of which of the following layer?

(A) nth layer

(B) (n+1)th layer

(C) (n-1)th layer

(D) None of the mentioned

9. In the B.E.T. equation, the P0 denotes _____________

(A) The Saturated vapor pressure of gas molecules

(B) All of the mentioned

(C) Pressure of the gas molecules

(D) The Unsaturated vapor pressure of gas molecules

10. The B.E.T. theory is used in calculating which of the following?

(A) Surface area of adsorbate

(B) Surface area of adsorbents and catalyst

(C) Surface area of adsorbent only

(D) None of the mentioned