List of top Chemistry Questions on Surface Chemistry asked in UP Board XII

Write the names of two lyophilic and two lyophobic colloids.

State Hardy–Schulze law.

The charge on colloidal particles of Fe\(_2\)O\(_3 \cdot xH_2O\) is:

Write a short note on Coagulation.

‘Action of soap is based on the emulsification and micelle formation.’ Comment on it.

Define Lyophilic and Lyophobic colloids with examples. Why is Lyophobic colloids easily coagulated?

Explain Adsorption theory of heterogeneous catalysis.

Differentiate between the following: (i) True solution and suspension
(ii) Lyophilic and Lyophobic colloid
(iii) Multimolecular and Macromolecular colloid

Justify with reasons: (i) Why does physical adsorption decrease on increasing temperature?
(ii) Why are powdered materials better effective adsorbents in comparison to their crystalline forms?

Write short notes on the following: (i) Tyndall Effect
(ii) Brownian Movement
(iii) Coagulation

Explain the following: (i) Electrophoresis
(ii) Dialysis