Surface Chemistry Test

Result

Surface Chemistry Test - 22

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Weekly Quiz Competition

Question 1
4 / -1

The simplest way to check whether a system is colloidal is by

A
Tyndall effect

B
Brownian movement

C
Electrodialysis

D
Finding out particle size
Question 2
4 / -1

Adsorbed acetic acid on activated charcoal is:

A
Adsorber

B
Absorber

C
Adsorbent

D
Adsorbate
Question 3
4 / -1

Alum helps in purifying water by

A
forming Si complex with clay particles

B
sulphate part which combines with the dirt and removes it

C
aluminium which coagulates the mud particles

D
making mud water soluble
Question 4
4 / -1

According to adsorption theory of catalysis, the speed of the reaction increases because

A
the concentration of the reactant molecules at the active centres of the catalyst becomes high due to adsorption

B
in the process of adsorption, the activation energy of the molecules becomes large

C
adsorption produces heat which increases the speed of reaction

D
adsorption lowers the activation energy of the reaction
Question 5
4 / -1

Which one of the following characteristics is not correct for physical adsorption?

A
Adsorption increases with increase in temperature

B
Adsorption is spontaneous

C
Both enthalpy and entropy of adsorption are negative

D
Adsorption on solids is reversible
Question 6
4 / -1

The coagulating power of an electrolyte for arsenious sulphide decreases in the order

A

B

C

D
Question 7
4 / -1

Rate of physisorption increases with

A
decrease in temperature

B
increase in temperature

C
decrease in pressure

D
decrease in surface area
Question 8
4 / -1

Which one is an example of miscelles system?

A
Soap + water

B
Rubber + benzene

C
Protein + water

D
None of these
Question 9
4 / -1

At isoelectric point

A
colloidal particles become uncharged

B
Colloidal sol becomes highly stable

C
Peptisation can be carried out

D
None of these
Question 10
4 / -1

Gold number was given by

A
Ostwald

B
Zsigmondy

C
Williams and Chang

D
Langmuir