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The variation of physical adsorption with temperature is shown by 

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Important Questions on Surface Chemistry

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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
For a linear plot of log xm versus log p in a Freundlich adsorption isotherm, which of the following statements is correct? (k and n are constants)
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
3 g of activated charcoal was added to 50 mL of acetic acid solution (0.06 N) in a flask. After an hour, it was filtered and the strength of the filtrate was found to be 0.042 N. The amount of acetic acid adsorbed (per gram of charcoal) is:
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
Adsorption of gas on a surface follows Freundlich adsorption isotherm. The plot of log⁡xm versus logP gives a straight line with slope equal to 0.5, then:

(xm is the mass of the gas adsorbed per gram of adsorbent)
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
10 mL of 1 mM surfactant solution forms a monolayer covering 0.24 cm2 on a polar substrate. If the polar head is approximated as a cube, what is its edge length?
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
The following statements relate to the adsorption of gases on a solid surface. Identify the incorrect statement among them:
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
Adsorption of a gas follows Freundlich adsorption isotherm. x is the mass of the gas adsorbed on mass m of the adsorbent. The plot of logxm vs  logp  is shown in the given graph. xm is proportional to,
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
Which of the following is not applicable to the phenomenon of adsorption?
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
Amongst the following statements regarding adsorption, those that are valid are:
(a) ΔH becomes less negative as adsorption proceeds.
(b) On a given adsorbent, ammonia is adsorbed more than nitrogen gas.
(c) On adsorption, the residual force acting along the surface of the adsorbent increases
(d) With the increase in temperature, the equilibrium concentration of adsorbate increases.
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
Which one of the following is not a property of physical adsorption?
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
Which of the following statement is true about the adsorption?
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
A gas undergoes physical adsorption on a surface and follows the given Freundlich adsorption isotherm equation
xm=kp0.5
Adsorption of the gas increases with:
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
Which one of the following characteristics is associated with adsorption?
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
Which of the following statements is correct for the spontaneous adsorption of a gas?
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
A particular adsorption process has the following characteristics: (i) It arises due to van der Waals forces and (ii) it is reversible. Identify the correct statement that describes the above adsorption process:
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
Adsorption is accompanied by
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
Which of the following graph is correctly represented according to Freundlich isotherm.
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
Adsorption of a gas follows Freudlich adsorption isotherm. If x is the mass of the gas adsorbed on mass m of the adsorbent, the correct plot of xm versus p is:
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at 25o C. For this process, the correct statement is 
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Given:

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On the basis of data given above, predict which of the following gases shows the least adsorption on a definite amount of charcoal?

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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Adsorption of a gas follows Freundlich adsorption isotherm. In the given plot, x is the mass of the gas adsorbed on mass m of the adsorbent at pressure P . xm is proportional to:

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