Surface Chemistry Test

Result

Surface Chemistry Test - 3

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Weekly Quiz Competition

Question 1
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Which among the following substances is an example of multimolecular colloids?

A
Starch sol

B
Sulphur sol

C
Micelles

D
Polystyrene

Solution

Multimolecular colloids are formed when a large number of atoms or molecules of a substance aggregate together to form speices having size in colloidal range. sulphur sol contains a thousand of S8 molecules.
Question 2
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Tyndall effect in colloidal solution is due to:

A
Reflection of light.

B
Scattering of light.

C
Presence of electrically charged particles.

D
Adsorption of light.

Solution

Tyndall effect is defined as scattering of light by colloidal particles.
Question 3
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Adsorption isobar is a curve showing variation of adsorption ______.

A
With temperature at constant pressure.

B
With volume at constant temperature.

C
With volume at constant pressure.

D
With pressure at constant temperature.

Solution

Isobar means when pressure is constant.
Question 4
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Which step of enzyme catalysis mechanism is shown in figure?

A
Binding of enzyme to substrate to form product.

B
Binding of enzyme to substrate to form an activated complex.

C
Decomposition of substrate to form product.

D
Decomposition of the activated complex to form products.

Solution

Substrate bind to specific site of enzyme known as active site to form a enzyme substrate complex.
Question 5
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Which of the following statement is true about Langmuir ’s adsorption?

A
It is not specific in nature

B
It forms a monolayer

C
It occurs at low temperature

D
It has a reversible temperature

Solution

Langmuir isotherm assume monolayer formation only.
Question 6
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When adsorption of oxalic acid is carried out on activated charcoal, then activated charcoal is known as

A
Adsorbate

B
Absorption

C
Adsorber

D
Adsorbent

Solution

Surface on which adsorption occurs is known as adsorbent.
Question 7
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Which of the following metal solution cannot be prepared by Bredig ’s arc method?

A
Platinum

B
Gold

C
Potassium

D
Copper sol

Solution

Bredig 's arc method is a method of preparation of the colidal solution of metals such as silver, gold, platinum etc. Copper sol is not prepared using Bredig 's arc method.
Question 8
1 / -0.25

The average molecular mass of colloidal can be determined by

A
Osmotic pressure measurement

B
Flocculation value

C
Tyndall effect

D
None of these

Solution

Average molecular mass of colloidal solution is determined by Osmotic Pressure measurement.
Question 9
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Which of the following processes does not involve a catalyst?

A
Oswald process

B
Haber process

C
Thermite process

D
Contact process

Solution

Thermite process doesn ’t require a catalyst.
Question 10
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Which type of a property is the Brownian movement of colloidal solution?

A
Mechanical

B
Electrochemical

C
Electrical

D
Optical

Solution

Movement is always a mechanical property.
Question 11
1 / -0.25

Ammonia is adsorbed by

A
Silica

B
Water

C
Charcoal

D
Alcohol

Solution

Charcoal act as an adsorbent.
Question 12
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Which among the following is adsorbed greatly by activated charcoal?

A
CH₄

B
SO₂

C
H₂

D
CO

Solution

SO₂ due to high polarity and surface area is adsorbed maximum.
Question 13
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Which among the following is an example of sorption?

A
Ammonia on charcoal

B
Ammonia on water

C
Water on calcium chloride

D
Chalk dipped in ink

Solution

When chalk is dipped in ink, absorption and adsorption both takes place which is called sorption.
Question 14
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The adsorbent used in decolouration of vinegar and sugar solution is

A
Silica gel

B
Alumina gel

C
Oxygen

D
Activated carbon

Solution

It adsorbs the colour in solutions.
Question 15
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Which of the following kinds of catalysis can be explained by the adsorption theory?

A
enzyme catalysis

B
homogeneous catalysis

C
acid base catalysis

D
heterogeneous catalysis

Solution

Correct option is D. heterogeneous catalysis

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Surface Chemistry Test - 3

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Surface Chemistry Test - 3

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Question 1

Starch sol

Sulphur sol

Micelles

Polystyrene

Solution

Question 2

Reflection of light.

Scattering of light.

Presence of electrically charged particles.

Adsorption of light.

Solution

Question 3

With temperature at constant pressure.

With volume at constant temperature.

With volume at constant pressure.

With pressure at constant temperature.

Solution

Question 4

Binding of enzyme to substrate to form product.

Binding of enzyme to substrate to form an activated complex.

Decomposition of substrate to form product.

Decomposition of the activated complex to form products.

Solution

Question 5

It is not specific in nature

It forms a monolayer

It occurs at low temperature

It has a reversible temperature

Solution

Question 6

Adsorbate

Absorption

Adsorber

Adsorbent

Solution

Question 7

Platinum

Gold

Potassium

Copper sol

Solution

Question 8

Osmotic pressure measurement

Flocculation value

Tyndall effect

None of these

Solution

Question 9

Oswald process

Haber process

Thermite process

Contact process

Solution

Question 10

Mechanical

Electrochemical

Electrical

Optical

Solution

Question 11

Silica

Water

Charcoal

Alcohol

Solution

Question 12

CH4

SO2

H2

CO

Solution

CH₄

SO₂

H₂