Adsorption of gas on a surface follows Freundlich adsorption isotherm. The plot of log ⁡ x m versus log P gives a straight line with slope equal to 0 . 5 , then: ( x m is the mass of the gas adsorbed per gram of adsorbent)

adsorption is proportional to the square root of pressure.

adsorption is proportional to the square of pressure.

adsorption is proportional to the pressure.

adsorption is independent of pressure.

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Adsorption isostere is

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Important Questions on Surface Chemistry

EASY

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:

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Which of the following is not applicable to the phenomenon of adsorption?

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

For a linear plot of

\log (\frac{x}{m})

versus

\log p

in a Freundlich adsorption isotherm, which of the following statements is correct? (

k

and

n

are constants)

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

A gas undergoes physical adsorption on a surface and follows the given Freundlich adsorption isotherm equation

\frac{x}{m} = k p^{0.5}

Adsorption of the gas increases with:

EASY

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:

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

10 m L

1 m M

surfactant solution forms a monolayer covering

0.24 c m^{2}

on a polar substrate. If the polar head is approximated as a cube, what is its edge length?

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Adsorption of gas on a surface follows Freundlich adsorption isotherm. The plot of

\log \frac{x}{m}

versus

\log (P)

gives a straight line with slope equal to

0.5

, then:

(

\frac{x}{m}

is the mass of the gas adsorbed per gram of adsorbent)

HARD

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

The mass of gas adsorbed, $x$ , per unit mass of adsorbate, $m$ , was measured at various pressures, $p .$ A graph between $\log \frac{x}{m}$ and $\log p$ gives a straight line with slope equal to $2$ and the intercept equal to $0.4771$ . The value of $\frac{x}{m}$ at a pressure of $4 atm$ is :

(Given $\log 3 = 0.4771$ )

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Which one of the following is not a property of physical adsorption?

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Which of the following statement is true about the adsorption?

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Which of the following statements is correct for the spontaneous adsorption of a gas?

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Which one of the following characteristics is associated with adsorption?

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Adsorption is accompanied by

MEDIUM

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

\log \frac{x}{m}

\log (p)

is shown in the given graph.

\frac{x}{m}

is proportional to,
Question Image

MEDIUM

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.

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

For Freundlich adsorption isotherm, a plot of

\log (x / m) (y - axis)

and

\log p (x - axis)

gives a straight line, the intercept and slope fo rthe line is

0.4771 and 2

, respectively. The mass of gas, adsorbed per gram of adsorbent if the initial pressure is

0.04 atm

is _____

\times 10^{- 4} g

EASY

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

\frac{x}{m}

versus p is:

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at 25^oC. For this process, the correct statement is

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Given:

Question Image

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

MEDIUM

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:

Adsorption isostere is

Important Questions on Surface Chemistry

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