Surface Chemistry Test

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Surface Chemistry Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

AlCl₃ in Friedel-Craft reaction acts as

A
Oxidizing agent

B
Reducing agent

C
Acid catalyst

D
None of these
Question 2
1 / -0

Which is not correct

A
Every solid substance can be brought in colloidal state

B
Every solid substance can be made to behave like a lyophobic colloid

C
Addition of electrolyte coagulates the sol

D
Colloidal particles carry charges
Question 3
1 / -0

Colloidal solution of arsenious sulphide can be prepared by

A
Electrodispersion method

B
Peptization

C
Double decomposition

D
Hydrolysis
Question 4
1 / -0

For the congulation of 100 ml of arsenius sulphide sol 5 ml of 1 M NaCl is required. What is the coagulating value of NaCl ?

A
46.7

B
46.7

C
49.9

D
42.0
Question 5
1 / -0

The stability of lyophilic colloids is due to

A
Charge on their particles

B
A layer of medium of dispersion on their particles

C
The smaller size of their particles

D
The large size of their particles
Question 6
1 / -0

For adsorption which is correct

A
DH – ve
DM + ve
DH – ve

B
DH + ve
DS + ve
DU + ve

C
DH – ve
DS – ve
DH – ve

D
DH + ve
DS – ve
DH – ve
Question 7
1 / -0

In homogenous catalytic reactions, the rate of reaction

A
Depends upon the concentration of catalyst

B
Independent of the concentration of catalyst

C
Depends upon the free energy change

D
Depends upon the free energy change
Question 8
1 / -0

For adsorption of gas on solid surface, the plots of log x/m vs. log P is linear with a slope equal to

A
K

B
log K

C
1 Nk

D
1/n(n being integer)

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Surface Chemistry Test - 1

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Surface Chemistry Test - 1

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Question 1

Oxidizing agent

Reducing agent

Acid catalyst

None of these

Question 2

Every solid substance can be brought in colloidal state

Every solid substance can be made to behave like a lyophobic colloid

Addition of electrolyte coagulates the sol

Colloidal particles carry charges

Question 3

Electrodispersion method

Peptization

Double decomposition

Hydrolysis

Question 4

46.7

46.7

49.9

42.0

Question 5

Charge on their particles

A layer of medium of dispersion on their particles

The smaller size of their particles

The large size of their particles

Question 6

DH – veDM + veDH – ve

DH + veDS + veDU + ve

DH – veDS – veDH – ve

DH + veDS – veDH – ve

Question 7

Depends upon the concentration of catalyst

Independent of the concentration of catalyst

Depends upon the free energy change

Depends upon the free energy change

Question 8

K

log K

1 Nk

1/n(n being integer)

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DH – ve
DM + ve
DH – ve

DH + ve
DS + ve
DU + ve

DH – ve
DS – ve
DH – ve

DH + ve
DS – ve
DH – ve