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Physical adsorption is an exothermic process .

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Important Questions on Surface Chemistry

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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
The thermodynamic condition for the process of adsorption is 
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
The enthalpy change for the adsorption process and micelle formation respectively are
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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
During Adsorption of a gas on a solid
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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

The number of incorrect statement/s from the following is/are

A. Water vapours are adsorbed by anhydrous calcium chloride.

B. There is a decrease in surface energy during adsorption.

C. As the adsorption proceeds, ΔH becomes more and more negative.

D. Adsorption is accompanied by decrease in entropy of the system.

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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
Which one of the following is correct for the adsorption of a gas at a given temperature on a solid surface?
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
If the adsorption of a gas on solid metal surface is spontaneous and exothermic, then
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
What is an adsorption isotherm? Describe Freundlich adsorption isotherm.
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Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
Adsorption is accompanied by
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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:
HARD
Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
When O2 is adsorbed on a metallic surface, electron transfer occurs from the metal to O2 . The TRUE statement(s) regarding this adsorption is(are)
EASY
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
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
What is the effect on ∆H and ∆S during the process 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.
EASY
Chemistry>Physical Chemistry>Surface Chemistry>Adsorption
Which of the following statements is correct for the spontaneous adsorption of a gas?