Q3 of 26 Page 1

What is the role of desorption in the process of catalysis?

Desorption is the process when the products formed on the surface of adsorbent are released from there. It is opposite of sorption.


Desorption plays an important role in catalysis because when the formed products will diffuse from the surface of adsorbent then only new adsorbate molecules will be adsorbed on adsorbent for further reaction and the process will be able to continue. Desorption makes the surface available for fresh adsorbate molecules for the reaction to take place.


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1

What is the formula of a compound in which the element P forms ccp lattice and atoms of Q occupy 2/3rd of tetrahedral voids?

 2

Arrange the following hydrides of Group-16 elements in the increasing order of their thermal stability: H2O, H2S, H2Se, H2Te

 4

Write the IUPAC name of the following compound:

C6H5–CH2–CH2–OH


 5

Among the isomers of pentane (C5H12), write the one which on photochemical chlorination yields a single monochloride.