Surface Chemistry Test

Result

Surface Chemistry Test - 6

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Weekly Quiz Competition

Question 1
4 / -1

In physical adsorption, the adsorbent and adsorbate are held together by the

A
ionic forces

B
covalent forces

C
van der Waals' forces

D
H-bonding
Question 2
4 / -1

During the adsorption of krypton on activated charcoal at low temperature

A
∆H > 0 and ∆S < 0

B
∆H < 0 and ∆S < 0

C
∆H > 0 and ∆S > 0

D
∆H < 0 and ∆S > 0

Solution
Question 3
4 / -1

Rate of physical adsorption increases with

A
decrease in surface area

B
decrease in temperature

C
decrease in pressure

D
increase in temperature
Question 4
4 / -1

Freundlich adsorption isotherm is

A

B
x = mkp^1/n

C
x/m = kp^-n

D
All of these

Solution
Question 5
4 / -1

Activated charcoal is used to remove colouring matter from pure substances. It works by

A
oxidation

B
reduction

C
bleaching

D
adsorption
Question 6
4 / -1

The extent of adsorption of a gas on a solid depends on

A
nature of the gas

B
pressure of the gas

C
temperature of the gas

D
All of these
Question 7
4 / -1

In the case of autocatalysis

A
product catalysis

B
solvent catalysis

C
reactant catalysis

D
heat produced in the reaction catalysis
Question 8
4 / -1

Which of the following reaction requires catalyst?

A
S + O₂ → SO₂

B
C + O₂ → CO₂

C
2SO₂ + O₂ → 2SO₃

D
All of the above

Solution
Question 9
4 / -1

Catalyst in a reaction

A
lowers the activation energy

B
increases the rate of reaction

C
Both (1) and (2)

D
initiates the reaction
Question 10
4 / -1

Hydrolysis of urea is an example of

A
homogeneous catalysis

B
heterogeneous catalysis

C
biochemical catalysis

D
zeolite catalysis

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Re-Attempt Weekly Quiz Competition

Surface Chemistry Test - 6

Result

Surface Chemistry Test - 6

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SHARING IS CARING

Question 1

ionic forces

covalent forces

van der Waals' forces

H-bonding

Question 2

∆H > 0 and ∆S < 0

∆H < 0 and ∆S < 0

∆H > 0 and ∆S > 0

∆H < 0 and ∆S > 0

Solution

Question 3

decrease in surface area

decrease in temperature

decrease in pressure

increase in temperature

Question 4

x = mkp1/n

x/m = kp-n

All of these

Solution

Question 5

oxidation

reduction

bleaching

adsorption

Question 6

nature of the gas

pressure of the gas

temperature of the gas

All of these

Question 7

product catalysis

solvent catalysis

reactant catalysis

heat produced in the reaction catalysis

Question 8

S + O2 → SO2

C + O2 → CO2

2SO2 + O2 → 2SO3

All of the above

Solution

Question 9

lowers the activation energy

increases the rate of reaction

Both (1) and (2)

initiates the reaction

Question 10

homogeneous catalysis

heterogeneous catalysis

biochemical catalysis

zeolite catalysis

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x = mkp^1/n

x/m = kp^-n

S + O₂ → SO₂

C + O₂ → CO₂

2SO₂ + O₂ → 2SO₃