An adsorption isotherm is a plot between:

1. The extent of adsorption \(({x \over m})\) against the pressure of gas (P) at constant V.
2. The extent of adsorption \(({x \over m})\) against the pressure of gas (P) at constant T.
3. The extent of absorption \(({x \over m})\) against the volume of gas (V) at constant P.
4. The extent of absorption \(({x \over m})\) against the pressure of gas (P) at constant T.

Subtopic:  Adsorption Isotherm |
 81%
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Adsorbent can be activated by:

1. Increasing the surface area of the adsorbent.
2. Breaking adsorbent into smaller pieces or powdering it.
3. Both (1) and (2)
4. None of the above.

Subtopic:  Adsorption and Absorption |
 89%
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The probable reasons of the exothermic nature of adsorption is:

1. Adsorption leads to a decrease in the residual forces on the surface of the adsorbent.
2. ∆S is negative.
3. Both (1) and (2) 
4. None of the above.

Subtopic:  Adsorption and Absorption |
 81%
From NCERT
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Which of the following statement is false?

1. Adsorption is a reversible process and is accompanied by a decrease in pressure.
2. Adsorption decreases with an increase in pressure.
3. Adsorption is an exothermic process.
4. The magnitude of physisorption adsorption decreases with an increase in temperature.

Subtopic:  Adsorption and Absorption |
 75%
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Hydrophobic sols are easily coagulated as?

1. The particles present in them come closer and form aggregates, leading to precipitation.
2. The particles present in them move farther and form aggregates, which leads to precipitation.
3. The particles present in them come closer and do not form aggregates, leading to precipitation.
4. The particles present in them move farther and do not form aggregates, leading to precipitation.
Subtopic:  Lyophilic & Lyophobic Sol |
 72%
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Enzymes are:

1. Biochemical catalysts.

2. Protein molecules of high molecular masses.

3. Both (1) and (2)

4. None of the above.

Subtopic:  Catalyst |
 92%
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The phenomenon of the scattering of light by a colloidal solution known as:

1. Zeeman effect.

2. Tyndall effect.

3. Electrophoresis.

4. None of the above.

Subtopic:  Colloidal Solution |
 95%
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Correct statement about emulsion is:

1. The dispersed phase and dispersion medium are liquids.
2. The dispersed phase and dispersion medium are solids.
3. The dispersed phase and dispersion medium are gases.
4. The dispersed phase are solids and dispersion medium are liquids.
Subtopic:  Emulsions |
 87%
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The charge present on micelles is:

1. Negative charge.

2. Positive charge.

3. Both negative and positive charges.

4. None of the above.

Subtopic:  Emulsions |
 74%
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Heterogeneous catalysis is shown in:

1. \(2SO_{2}{(g)} \ + \ O_{2}{(g)} \ \xrightarrow[]{Pt(s)} \ 2SO_{3}{(g)}\)
2. \(4NH_{3}{(g)} \ + \ 3H_{2}{(g)} \ \xrightarrow[]{Fe(s)} \ 2NH_{3}{(g)}\)
3. \(Vegetable \ oil(l) \ + \ H_{2}(g) \ \xrightarrow[]{Ni(s)} \ Vegetable \ ghee(s)\)
4. All of the above

Subtopic:  Catalyst |
 84%
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