Choose the correct statement for chemical ads | vedclass

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Question

(C) In chemical adsorption (chemisorption),a chemical bond is formed between the adsorbate and the adsorbent. $1$. The enthalpy of adsorption is high,

Vedclass · Accepted Answer

Usually a unimolecular layer is formed on the adsorbent

Vedclass · Answer

(C) In chemical adsorption (chemisorption),a chemical bond is formed between the adsorbate and the adsorbent. $1$. The enthalpy of adsorption is high,typically ranging from $80-240 \ kJ \ mol^{-1}$,not less than $20 \ kJ \ mol^{-1}$. $2$. Chemical bonds are formed,not Van der Waals forces (which are characteristic of physisorption). $3$. Since chemical bonds are formed,the process is specific and usually results in the formation of a unimolecular layer. $4$. Adsorption is a spontaneous process where the surface area decreases,leading to a decrease in entropy $(\Delta S Therefore,the correct statement is that a unimolecular layer is formed.

Choose the correct statement for chemical adsorption.

Similar Questions

Which of the following is true for spontaneous adsorption?

The graph of $\log(x/m)$ versus $\log p$ is a straight line with an angle of $45^o$ and an intercept of $0.3010$ on the $y$-axis. Calculate the amount of gas adsorbed per gram at a pressure of $0.2 \, atm$.

The Freundlich adsorption isotherm varies with temperature according to the figure given below. Choose the correct option accordingly.

Which of the following is $NOT$ a characteristic of chemisorption?

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