Surface chemistry

Surface chemistry

12th Grade - University

15 Qs

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Surface chemistry

Surface chemistry

Assessment

Quiz

Chemistry

12th Grade - University

Medium

Created by

Sakshi Sakshi

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15 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

At the equilibrium position in the process of adsorption ___________.

ΔH > 0

ΔH = TΔS

ΔH > TΔS

ΔH < TΔS

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The term ‘sorption’ stands for ____________.

absorption

adsorption

both absorption and adsorption

desorption

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Extent of physisorption of a gas increases with ___________.

increase in temperature.

decrease in temperature.

decrease in surface area of adsorbent.

decrease in strength of van der Waals forces.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of absorption?

Water on silica gel

Water on calcium chloride

Hydrogen on finely divided nickel

Oxygen on metal surface

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Method by which lyophobic sol can be protected.

By addition of oppositely charged sol.

By addition of an electrolyte.

By addition of lyophilic sol.

By boiling.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Freshly prepared precipitate sometimes gets converted to colloidal solution by ___________.

coagulation

electrolysis

diffusion

peptisation

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following electrolytes will have maximum coagulating value for AgI/Ag+ sol?

Na2S

Na3PO4

Na2SO4

NaCl

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