Q5 of 26 Page 1

Physisorption is reversible while chemisorption is irreversible? Why?

In Physisorption the adsorbate molecules are held by weak van der Waal’s forces, so on decreasing the pressure it is reversible. Chemisorption involves strong chemical bonding between adsorbate and adsorbent molecules which is difficult to reverse and hence it is irreversible.


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3

Write the IUPAC name of the given compound:


 4

What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy2/3rd of octahedral voids?

 6

(i) Write down the IUPAC name of the following complex:

[Cr(en)3]Cl3


(ii) Write the formula for the following complex:


Potassium tri oxalato chromate(III)


 7

What is meant by negative deviation from Raoult’s law? Give an example. What is the sign of ΔmixH for negative deviation?

OR


Define azeotropes. What type of azeotrope is formed by negative deviation from Raoult’s law? Give example.