Write the differences between physisorption and chemisorption with respect to the following:

(i) Specificity

(ii) Temperature dependence

(iii) Reversibility and

(iv) Enthalpy change

The conductivity of 0.20 M solution of KCl at 298 K is 0.025 Scm^-1. Calculate its molar conductivity.

Write the dispersed phase and dispersion medium of the following colloidal systems:

(i) Smoke

(ii) Milk

OR

What are lyophilic and lyophobic colloids? Which of these sols can be easily coagulated on the addition of small amounts of electrolytes?

(a) Which solution is used for the leaching of silver metal in the presence of air in the metallurgy of silver?

(b) Out of C and CO, which is a better reducing agent at the lower temperature range in the blast furnace to extract iron from the oxide ore?

What happens when

(i) PCl₅ is heated?

(ii) H₃PO₃ is heated?

Write the reactions involved.