Trying to find the right answer to this..

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Surface Chemistry

Short Answer Type

91. Why are lyophilic sols self-stabilised?

134 Views

92. Sky appears blue in colour. Why?

581 Views

93.

Explain the following observations:
(a) Cottrell’s smoke precipitator is fitted at the mouth of the chimney used in factories.
(b) Physical adosption is multi layered, while chemisorption non-tayered.

867 Views

94. What causes Brownian movement in a colloidal solution?

426 Views

95. Which has a higher enthalpy of adsorption, physisorption or chemisorption?

Answer:
Chemisorption has a higher enthalpy of adsorption. Because it involves chemical bond formation.

386 Views

96. Describe electrophoresis briefly.

232 Views

Long Answer Type

97. Distinguish between the meaning of the terms adsorption and absorption. Give one example of each.

206 Views

98. What is the difference between physisorption and chemisorption?

321 Views

Short Answer Type

99. Give reason why a finely divided substance is much more effective as an adsorbent.

192 Views

100. What are the factors which influence the adsorption of a gas on a solid?

130 Views