Assertion : In chemisorption,adsorption first | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) In chemisorption,adsorption involves the formation of chemical bonds between the adsorbate and the adsorbent,which requires an initial activation

Vedclass · Accepted Answer

If the Assertion is correct but Reason is incorrect.

Vedclass · Answer

(C) In chemisorption,adsorption involves the formation of chemical bonds between the adsorbate and the adsorbent,which requires an initial activation energy.Initially,as temperature increases,more molecules gain sufficient energy to overcome this activation barrier,leading to an increase in adsorption.However,once the chemical bonds are formed,the process is typically exothermic. According to Le Chatelier's principle,an increase in temperature at higher values favors the reverse (desorption) process,causing adsorption to decrease.Therefore,the Assertion is correct,but the Reason is incorrect because heat does not provide 'more and more' activation energy indefinitely; rather,it facilitates the initial bond formation,and excessive heat eventually destabilizes the formed bonds.

Assertion : In chemisorption,adsorption first increases with temperature and then decreases.
Reason : Heat keeps on providing more and more activation energy.

Similar Questions

Which type of bond is involved in the phenomenon of physical adsorption?

$A$ charcoal cube having side length $10 \ cm$ is chopped lengthwise into $5$ equal pieces. Then the effective adsorption power

Distinguish between the meaning of the terms adsorption and absorption. Give one example of each.

Which substance is used as an adsorbent in chromatography?

What are the applications of adsorption in chemical analysis?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Assertion : In chemisorption,adsorption first increases with temperature and then decreases.Reason : Heat keeps on providing more and more activation energy.