Surface Chemistry Test

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Surface Chemistry Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following statements is true?

A
Catalyst is used to alter the values of K_p and K_c of an equilibrium reaction.

B
A large quantity of catalyst is needed for a reaction.

C
A catalyst alters the position of equilibrium in a reversible reaction.

D
A catalyst is specific in its action.
Question 2
1 / -0

The following question has four choices out of which ONLY ONE is correct.

Which of the following statements is not correct?

A
Adsorption energy for chemical adsorption is generally greater than that for physical adsorption.

B
Physical adsorption is due to van der Waals forces.

C
Physical adsorption decreases at high temperature.

D
Physical adsorption is an irreversible reaction.
Question 3
1 / -0

Which zeolite is used by the petrochemical industry to catalyze the cracking of hydrocarbons?

A
Mordenite

B
Offretite

C
Ferrierite

D
ZSM-5
Question 4
1 / -0

Emulsions are colloids formed by immiscible liquids and are stabilized by adding a stabilizer. Insoluble soap acts as a stabilizer because

A
it is an electrolyte

B
it has a hydrophilic end and a hydrophobic end

C
of the cleansing action of soap

D
of the formation of soap micelle
Question 5
1 / -0

Which of the following will have the least coagulating power for arsenious sulphide sol?

A
Na⁺

B
Ca²⁺

C
Al³⁺

D
Mg²⁺
Question 6
1 / -0

Which of the following factors are responsible for an increase in the rate of a surface-catalysed reaction?

1. A catalyst provides proper orientation for the reactant molecules to react.
2. Heat of adsorption of the reactants on a catalyst helps the reactant molecules to attain the required activation energy.
3. The catalyst increases the activation energy of the reaction.
4. Adsorption increases the local concentration of reactant molecules on the surface of the catalyst.

A
1 and 2

B
1 and 3

C
2 and 4

D
1, 2 and 3
Question 7
1 / -0

The autocatalyst used in the oxidation of oxalic acid by acidified KMnO₄ is

A
K₂SO₄

B
KMnO₄

C
MnSO₄

D
CO₂
Question 8
1 / -0

Which of the following acts as a catalytic poison in Haber's process?

A
Platinum

B
Iron

C
Molybdenum

D
Sulphur
Question 9
1 / -0

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

A
Desorption

B
Physisorption

C
Sorption

D
Chemisorptions

Solution

Both adsorption and absorption can take place simultaneously also. The term sorption is used to describe both the processes.
Question 10
1 / -0

The reactions involving zeolites as catalysts depend on

A
the shape of the substrate molecule

B
the size of the pores on the catalyst surface

C
Both (1) and (2)

D
the pH of the reaction mixture
Question 11
1 / -0

Which of the following catalysts is used for the decomposition of KClO₃?

A
MnO₂

B
Cl₂

C
V₂O₅

D
Pt
Question 12
1 / -0

Column chromatography is based on the principle of

A
selective absorption

B
selective adsorption

C
differential absorption

D
differential adsorption
Question 13
1 / -0

The following question has four choices out of which ONLY ONE is correct.

The adsorbent used to decolorize raw sugar is

A
alum

B
animal charcoal

C
powdered copper

D
ZnO
Question 14
1 / -0

Which of the following substances is not used for preparing lyophilic sols?

A
Starch

B
Gum

C
Gelatin

D
Metal sulphide

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Surface Chemistry Test - 2

Result

Surface Chemistry Test - 2

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SHARING IS CARING

Question 1

Catalyst is used to alter the values of Kp and Kc of an equilibrium reaction.

A large quantity of catalyst is needed for a reaction.

A catalyst alters the position of equilibrium in a reversible reaction.

A catalyst is specific in its action.

Question 2

Adsorption energy for chemical adsorption is generally greater than that for physical adsorption.

Physical adsorption is due to van der Waals forces.

Physical adsorption decreases at high temperature.

Physical adsorption is an irreversible reaction.

Question 3

Mordenite

Offretite

Ferrierite

ZSM-5

Question 4

it is an electrolyte

it has a hydrophilic end and a hydrophobic end

of the cleansing action of soap

of the formation of soap micelle

Question 5

Na+

Ca2+

Al3+

Mg2+

Question 6

1 and 2

1 and 3

2 and 4

1, 2 and 3

Question 7

K2SO4

KMnO4

MnSO4

CO2

Question 8

Platinum

Iron

Molybdenum

Sulphur

Question 9

Desorption

Physisorption

Sorption

Chemisorptions

Solution

Question 10

the shape of the substrate molecule

the size of the pores on the catalyst surface

Both (1) and (2)

the pH of the reaction mixture

Question 11

MnO2

Cl2

V2O5

Pt

Question 12

selective absorption

selective adsorption

differential absorption

differential adsorption

Question 13

alum

animal charcoal

powdered copper

ZnO

Question 14

Starch

Gum

Gelatin

Metal sulphide

User

Catalyst is used to alter the values of K_p and K_c of an equilibrium reaction.

Na⁺

Ca²⁺

Al³⁺

Mg²⁺

K₂SO₄

KMnO₄

MnSO₄

CO₂

MnO₂

Cl₂

V₂O₅