wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

(a) Write two differences between physical adsorption and chemical adsorption.
(b) Define homogeneous and heterogeneous catalysis. Give an example of each.
(c) Draw labelled diagram of electro-dialysis.

Open in App
Solution

(a) Differences between physical adsorption and chemical adsorption.
Physical adsorption Chemical adsorption
It involves weak van der Waals forces.
It involves chemical bonds (covalent bonds)
Multilayers of adsorbed particles are formed.
A monolayer of adsorbed particles is formed.
(b) Homogeneous catalysis: A homogeneous catalysis is one in which the catalyst and the reactants exist in the same phase. A homogeneous catalyst dissolves in the gas phase or solution and acts uniformly throughout the gas or solution. Hydrolysis of ethyl acetate by water in an acidic medium to form acetic acid and ethanol is an example of homogeneous catalysis.
Heterogeneous catalysis: A heterogeneous catalysis is one in which the catalyst and the reactants exist in different phases. A heterogeneous catalyst is usually solid and the reactants are in the gas phase or solution. Synthesis of ammonia from nitrogen and hydrogen in presence of an iron catalyst with potassium oxide and aluminium oxide (Haber process) is an example of heterogeneous catalysis.

(c) Labeled diagram of electrodialysis is as shown in the image.
629551_603091_ans_d5a7028c15904628afee3f5d7ae3a595.png

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Physisorption and Chemisorption
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon