Itself destroys in the reaction

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JEE • CHEMISTRY • SURFACE CHEMISTRY

Surface chemistry practice · Easy

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Practice format and chapter quiz

These sets use single-correct-answer MCQs. They do not cover every JEE Main or JEE Advanced question format and are not full-length mock papers.

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Showing 1-30 of 128 questions

1 Easy

1 of 128

Understanding +4 | -1

Egg albumin is :

View answer and explanation

Correct option: D

All of these

Option D (All of these) is correct because egg albumin exhibits properties of reversible, lyophilic, and protective colloids.

2 Easy

2 of 128

Understanding +4 | -1

Which of the following reaction is an example for homogeneous catalysis?

View answer and explanation

Correct option: C

2\mathrm{CO}\left( \mathrm{g} \right) + {\mathrm{O}_2}\left( \mathrm{g} \right)\xrightarrow{{NO(g)}}2\mathrm{C}{\mathrm{O}_2}\left( \mathrm{g} \right)

Option C (2CO(g) + O2(g) ⟶NO(g) 2CO2(g)) is correct because in homogeneous catalysis, the catalyst and reactants are in the same phase, which is the gaseous phase in this case.

3 Easy

3 of 128

Understanding +4 | -1

Four gases, A, B, C and D have critical temperatures

5.3,33.2, 126.0

and

154.3 \mathrm{K}

respectively
For their adsorption on a fixed amount of charcoal, the correct order is :

View answer and explanation

Correct option: C

>

>

>

Option C is correct because the extent of adsorption is directly proportional to the critical temperature of the gas.

4 Easy

4 of 128

Understanding +4 | -1

Intensity of the scattered light depends on the difference between ______ of dispersed phase and dispersion medium

View answer and explanation

Correct option: B

Refractive indices

Option B is correct because the intensity of scattered light in colloids depends on the difference in refractive indices between the dispersed phase and the dispersion medium.

5 Easy

5 of 128

Remembering +4 | -1

Which of the following is an example of biochemical catalyst?

View answer and explanation

Correct option: C

Zymase

Option C (Zymase) is correct because Zymase is an enzyme complex that catalyzes the fermentation of sugar into ethanol and carbon dioxide.

6 Easy

6 of 128

Understanding +4 | -1

Gold numbers of protective colloids

A,B,C\;and\;D,

are 0.50, 0.01, 0.10, and 0.005, respectively. The correct order of their protective powers is

View answer and explanation

Correct option: C

A < C < B < D

Option A (

A < C < B < D

) is correct because the protective power of a colloid is inversely proportional to its gold number.

7 Easy

7 of 128

Remembering +4 | -1

Which one is hydrophobic in nature?

View answer and explanation

Correct option: B

Sulphur

Option B (Sulphur) is correct because inorganic sols, like sulphur, are typically hydrophobic in nature.

8 Easy

8 of 128

Remembering +4 | -1

In whipped cream, the dispersed phase and dispersion medium respectively are

View answer and explanation

Correct option: B

Gas and liquid

Option B (Gas and liquid) is correct because whipped cream consists of gas bubbles (air) dispersed in a liquid (cream).

9 Easy

9 of 128

Remembering +4 | -1

Soap removes grease by :

View answer and explanation

Correct option: B

Emulsification

Option B (Emulsification) is correct because soap molecules surround grease particles, forming an emulsion that can be washed away with water.

10 Easy

10 of 128

Remembering +4 | -1

Which type of metals form effective catalysts?

View answer and explanation

Correct option: B

Transition metals

Option B (Transition metals) is correct because transition metals have variable oxidation states and can form complexes, making them effective catalysts.

11 Easy

11 of 128

Remembering +4 | -1

Enzyme are:

View answer and explanation

Correct option: B

Complex nitrogen compounds usually hydrolytic in nature

Option B (Complex nitrogen compounds usually hydrolytic in nature) is correct because enzymes are proteins, which are complex nitrogen-containing compounds, and they often catalyze hydrolytic reactions.

12 Easy

12 of 128

Understanding +4 | -1

Which electrolyte is least effective in causing coagulation of +ve ferric hydroxide sol?

View answer and explanation

Correct option: A

\mathrm{KBr}

Option A (

\mathrm{KBr}

) is correct because bromide ions have the lowest charge and thus are least effective in coagulating a positive sol, according to the Hardy-Schulze rule.

13 Easy

13 of 128

Remembering +4 | -1

Which one of the following equation represents Freundlich adsorption isotherm?

View answer and explanation

Correct option: B

\frac{x}{m} = k{p^n}

Option B (

\frac{x}{m} = k{p^n}

) is correct because the Freundlich adsorption isotherm is represented by the equation

\frac{x}{m} = k{p^n}

14 Easy

14 of 128

Remembering +4 | -1

The phenomenon in which adsorption and absorption takes place simultaneously is called:

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Correct option: B

Sorption

Option B (Sorption) is correct because sorption is the process where both adsorption and absorption occur simultaneously.

15 Easy

15 of 128

Understanding +4 | -1

A particular adsorption process has the following characteristics :

(i) It arises due to van der Waal's forces and

(ii) it is reversile. Identify the correct statement that describes the above adsorption process :

View answer and explanation

Correct option: D

Energy of activation is low.

Option D (Energy of activation is low) is correct because physical adsorption, which arises due to van der Waal's forces, has a low activation energy.

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16 Easy

16 of 128

Remembering +4 | -1

Enzyme catalysts are :

View answer and explanation

Correct option: A

Highly specific in nature

Option A is correct because enzymes exhibit high specificity, catalyzing only one or a few specific reactions due to their unique active site structure.

17 Easy

17 of 128

Remembering +4 | -1

Example of intrinsic colloid is

View answer and explanation

Correct option: A

glue

Option A (glue) is correct because glue forms a colloidal sol directly when shaken with the dispersion medium, classifying it as an intrinsic colloid.

18 Easy

18 of 128

Remembering +4 | -1

In emulsion the dispersed phase and dispersion medium are :

View answer and explanation

Correct option: B

Both liquids

Option B (Both liquids) is correct because an emulsion is a colloid where both the dispersed phase and the dispersion medium are liquids.

19 Easy

19 of 128

Remembering +4 | -1

The average size of the colloids is of the order :

View answer and explanation

Correct option: B

{10^{ - 7}}\;\mathrm{m}\;\mathrm{ to}\;{10^{ - 9}}\;\mathrm{m}

Option B (

{10^{ - 7}}\;\mathrm{m}\;\mathrm{ to}\;{10^{ - 9}}\;\mathrm{m}

) is correct because the size of colloidal particles typically ranges from 1 nm to 100 nm, which corresponds to

{10^{ - 9}}

m to

{10^{ - 7}}

20 Easy

20 of 128

Remembering +4 | -1

An example of solid sol is

View answer and explanation

Correct option: A

Gem stones

Option A (Gem stones) is correct because a solid sol is a colloidal solution where both the dispersed phase and the dispersion medium are solids.

21 Easy

21 of 128

Understanding +4 | -1

The electrolytic impurities of a sol can most easily be separated by

View answer and explanation

Correct option: D

electrodialysis

Option D (electrodialysis) is correct because it uses an electric field and semi-permeable membranes to efficiently remove ionic impurities from a sol.

22 Easy

22 of 128

Remembering +4 | -1

Enzymes are known to increase the rate of reaction by :

View answer and explanation

Correct option: D

{10^{12}}

times

Option D (

{10^{12}}

times) is correct because enzymes are highly efficient catalysts, increasing reaction rates by factors of

{10^6}

{10^{12}}

23 Easy

23 of 128

Remembering +4 | -1

Negative catalyst or inhibitor is one :

View answer and explanation

Correct option: A

Which retards the rate of reaction

Option A (Which retards the rate of reaction) is correct because a negative catalyst, also known as an inhibitor, slows down the rate of a chemical reaction.

24 Easy

24 of 128

Remembering +4 | -1

Which is not a macromolecule?

View answer and explanation

Correct option: A

Palmitate

Option A (Palmitate) is correct because palmitate is a fatty acid, which is a small molecule, not a macromolecule.

25 Easy

25 of 128

Understanding +4 | -1

Assertion (A): Chemical adsorption increases with increase in temperature and later it decreases.

Reason (R): Physical adsorption decreases with increase in temperature.

View answer and explanation

Correct option: A

Both (A) and (R) are true and (R) is the correct explanation of (A)

Option A is correct because chemical adsorption (chemisorption) initially increases with temperature as it requires activation energy, but later decreases due to the exothermic nature of adsorption, and physical adsorption (physisorption) decreases with increasing temperature due to weaker van der Waals forces.

26 Easy

26 of 128

Remembering +4 | -1

When adsorption of oxalic acid is carried out on activated charcoal, the activated charcoal is known as

View answer and explanation

Correct option: B

Adsorbent

Option B (Adsorbent) is correct because the activated charcoal provides the surface on which the oxalic acid is adsorbed.

27 Easy

27 of 128

Understanding +4 | -1

A catalyst

View answer and explanation

Correct option: B

Changes the rate constant

Option A (Lowers the activation energy) is the most direct effect of a catalyst, although it also changes the rate constant.

28 Easy

28 of 128

Remembering +4 | -1

Which of the following statements is correct for Tyndall effect?

View answer and explanation

Correct option: A

Scattering and polarizing of light by small suspended particles is called Tyndall effect

Option A (Scattering and polarizing of light by small suspended particles is called Tyndall effect) is correct because the Tyndall effect is the scattering of light by particles in a colloid or suspension.

29 Easy

29 of 128

Understanding +4 | -1

The blue colour of the water of the sea is due to :

View answer and explanation

Correct option: C

Scattering of blue light by sol paricles

Option C (Scattering of blue light by sol paricles) is correct because the blue color of the sea is due to the scattering of blue light by water molecules and other particles, as scattering is inversely proportional to the fourth power of wavelength.

30 Easy

30 of 128

Remembering +4 | -1

The movement of colloidal particles towards their respective electrodes in the presence of an electric field is known as

View answer and explanation

Correct option: D

Electrophoresis

Option D (Electrophoresis) is correct because electrophoresis is defined as the movement of colloidal particles towards their respective electrodes under the influence of an electric field.

Revision notes and key takeaways

Review SURFACE CHEMISTRY in your textbook or class notes, then use this set to check your understanding.

Key Takeaways

✓ This set contains 128 single-correct-answer MCQs on SURFACE CHEMISTRY.
✓ Try each question before opening its answer. Read the explanation where one is available.
✓ Sign in to save submitted answers. Revisit incorrect answers alongside your textbook or class notes.

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