List of top Chemistry Questions on Adsorption

Adsorption of phenol from its aqueous solution on to fly ash obeys Freundlich isotherm. At a given temperature, from 10 mg g$^{-1}$ and 16 mg g$^{-1}$ aqueous phenol solutions, the concentrations of adsorbed phenol are measured to be 4 mg g$^{-1}$ and 10 mg g$^{-1}$, respectively. At this temperature, the concentration (in mg g$^{-1}$) of adsorbed phenol from 20 mg g$^{-1}$ aqueous solution of phenol will be ____. Use: $\log_{10} 2 = 0.3$

Which term from the following is not related to adsorption?

What are the main differences between physical adsorption and chemical adsorption?

According to Freundlich adsorption isotherm

Which of the following represent the Freundlich adsorption isotherms?

Choose the correct answer from the options given below:

The plot of $ \log \frac{x}{m} $ (y-axis) and $ \log p(x) $ (x-axis) is a straight line inclined at an angle of 45°. When the intercept, $ K $ is 10 and pressure is 0.3 atm, the amount of solute in grams adsorbed per gram of adsorbent (log3 = 0.4771) is:

From the following, identify the favorable conditions for physical adsorption:

I) Large surface area
II) Low temperatures
III) High temperatures
IV) High pressures

Identify the correct statements about chemisorption:

I) It is irreversible adsorption
II) Enthalpy of adsorption is in the range of 20-40 kJ mol$^-1$
III) It is unlayered adsorption
IV) It does not need appreciable activation energy

2.0 g of activated charcoal is added to 100 mL of 0.5 M acetic acid (molar mass 60 g mol$^{-1}$), shaken well and filtered. The concentration of solution is reduced to 0.4 M. How many grams of acetic acid is adsorbed on charcoal per gram?

The adsorption of a gas on solid adsorbent follows Freundlich adsorption isotherm. The graph drawn between $ \frac{X}{m} $ and $ p $ at different temperatures X, Y, Z is shown. (X = mass of gas adsorbed, m = mass of adsorbent and p = Pressure of gas). The correct relation between X, Y, Z is:

For Freundlich adsorption isotherm, a graph of log (x/m) Vs. log (P) gives a straight line. The slope of line and its Y-axis intercept respectively are

Aqueous solution of raw sugar when passed over beds of animal charcoal, it becomes colourless. Pick the correct set of terminologies that can be used for the above example.

	Adsorbent	Adsorbate	Process
(1)	Solution of Sugar	Animal Charcoal	Soprtion
(2)	Animal Charcoal	Solution of Sugar	Absorption
(3)	Animal Charcoal	Colouring Substance	Adsorption
(4)	Colouring Substance	Animal Charcoal	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, $\Delta H$ becomes more and more negative.
D. Adsorption is accompanied by decrease in entropy of the system.

One mole of an ideal monoatomic gas is subjected to changes as shown in the graph The magnitude of the work done (by the system or on the system) is _______ J (nearest integer)

Given : $\log 2=0.3 \ln 10=2.3$