Surface Chemistry Test

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Surface Chemistry Test - 44

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following kinds of catalysis can be explained by the adsorption theory?

A
Heterogeneous catalyst

B
enzyme catalysis

C
homogeneous catalysis

D
acid base catalysis

Solution

Adsorption theory of Heterogeneous catalyst
As pen adsorption theory of catalysis, the reactions
in their gaseous state on in their dissolved state
in any solution gets adsorbed on the surface of
a suitable catalyst in its solid state
Ans is A) Heterogeneous catalyst
Question 2
1 / -0

Physisorption involves:

A
Ionic bonding

B
Covalent bonding

C
Vander walls forces

D
London forces

Solution
Question 3
1 / -0

Select incorrect statement

A
Micelles are macromolecular colloids

B
The electrical charge on a colliod particle is indicated by electrophoresis

C
Formation of micelles takes place above kraft temperature

D
Formation of micelles takes place below CMC

Solution

Direction ratios of
$$\cfrac{x-2}{2}=\cfrac{y+1}{3}=\cfrac{z}{4}$$
$$(2,3,4)$$
Since it is parallel to normal of required plane
Direction ratios wil be integral multiple of $$(2,3,4)$$
By options $$(2,3,4)$$ is correct answer
Question 4
1 / -0

Which of the following is not an example of heterogeneous catalytic reaction?

A
Ostwald's process

B
Haber's process

C
Combustion of coal

D
Hydrogenation of vegetable oils

Solution

Then is no catalyst is required for combustion of coal.
Question 5
1 / -0

Arrange cotton, silk, wool and nylon is decreasing order of their water absorption capacity

A
$$Nylon>cotton>wool>silk$$

B
$$Nylon>cotton>silk>wool$$

C
$$Wool>cotton>silk>nylon$$

D
$$cotton>wool>silk>nylon$$

Solution
Question 6
1 / -0

A substance forms zwitter ion, It can have functional group.

A
$$ - {\text{N}}{{\text{H}}_{\text{2}}}, - {\text{COOH}}$$

B
$$ - {\text{N}}{{\text{H}}_2}, - {\text{S}}{{\text{O}}_{\text{3}}}{\text{H}}$$

C
Both (A) and (B)

D
None of these

Solution

$$ - N{H_2}, - COOH \to -N{H^ + _3}, - CO{O^ - }$$

$$ - N{H_2}, - S{O_3}H \to - N{H^ + _3}, - S{O^ - _3}$$
Question 7
1 / -0

Which of the following gas absorb to a maximum amount by an activated charcoal?

A
$$N_2$$

B
$$O_2$$

C
$$Cl_3$$

D
$$CO_2$$

Solution

$$N_{2}$$
$$N_{2}$$ will be strongly absorbed by charcoal because of more surface area and can be easily liquified.
Question 8
1 / -0

The reaction
$$2SO_{2}(g)+O_{2} \xrightarrow { NO(g) } 2SO_{3} (g)$$

A
Heterogeneous catalysis

B
Homogegenous catalysis

C
Enzyme catalysis

D
None of them

Solution

$${2{S}{O}_{2}}_{(g)} + {O}_{2} \rightarrow {2{S}{O}_{3}}_{(g)}$$ is a Homogenous Catalysis.
This is because all the species taking part in the given reaction are in the same phase.
Question 9
1 / -0

Adsorption played an important role in:

A
heterogeneous catalysis

B
homogeneous catalysis

C
positive catalysis

D
negative catalysis

Solution

Heterogeneous catalysis
Because in heterogeneous catalysis, the catalysis is in different physical phase from the reactant and the reactions are in gas and catalyst in solid form an adsorption theory.
Question 10
1 / -0

The catalyst used in the reduction of perisulphate to sulphate with iodide ion is

A
$$ Fe^{3+} $$

B
$$ Fe^{2+} $$

C
Both 1 and 2

D
$$ Cr^{2+} $$

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Surface Chemistry Test - 44

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Surface Chemistry Test - 44

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Question 1

Heterogeneous catalyst

enzyme catalysis

homogeneous catalysis

acid base catalysis

Solution

Question 2

Ionic bonding

Covalent bonding

Vander walls forces

London forces

Solution

Question 3

Micelles are macromolecular colloids

The electrical charge on a colliod particle is indicated by electrophoresis

Formation of micelles takes place above kraft temperature

Formation of micelles takes place below CMC

Solution

Question 4

Ostwald's process

Haber's process

Combustion of coal

Hydrogenation of vegetable oils

Solution

Question 5

$$Nylon>cotton>wool>silk$$

$$Nylon>cotton>silk>wool$$

$$Wool>cotton>silk>nylon$$

$$cotton>wool>silk>nylon$$

Solution

Question 6

$$ - {\text{N}}{{\text{H}}_{\text{2}}}, - {\text{COOH}}$$

$$ - {\text{N}}{{\text{H}}_2}, - {\text{S}}{{\text{O}}_{\text{3}}}{\text{H}}$$

Both (A) and (B)

None of these

Solution

Question 7

$$N_2$$

$$O_2$$

$$Cl_3$$

$$CO_2$$

Solution

Question 8

Heterogeneous catalysis

Homogegenous catalysis

Enzyme catalysis

None of them

Solution

Question 9

heterogeneous catalysis

homogeneous catalysis

positive catalysis

negative catalysis

Solution

Question 10

$$ Fe^{3+} $$

$$ Fe^{2+} $$

Both 1 and 2

$$ Cr^{2+} $$

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