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Surface Chemistry
- Online Test
Surface Chemistry
TEST : 4
# Surface Chemistry
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q1.
Which is correct in case of Vander waals adsorption?
A.
High temperature , low pressure
B.
Low temperature, high pressure
C.
Low temperature, low pressure
D.
High temperature , high pressure
View Solution
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Answer :
Option B
Explaination / Solution:
Physiadsorption is favoured only at low temperature and high pressure.
# Surface Chemistry
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q2.
Which adsorption takes place at low temperature?
A.
None of these
B.
Chemical
C.
Both (a) and (b)
D.
Physical
View Solution
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Answer :
Option D
Explaination / Solution:
Physical adsorption is favoured at low temperature because it involves only vanderwall interactions between adsorbate and adsorbent.
# Surface Chemistry
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q3.
Pt and Pd adsorb large volume of hydrogen under specific conditions. The hydrogen so adsorbed is called
A.
Atomic hydrogen
B.
Reactive hydrogen
C.
Adsorbed hydrogen
D.
Occluded hydrogen
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Answer :
Option D
Explaination / Solution:
Adsorption of hydrogen by metal like Pt is occlution and hydrogen is known as occluded hydrogen.
# Surface Chemistry
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q4.
When adsorption of oxalic acid is carried out on activated charcoal, then activated charcoal is known as
A.
Adsorbate
B.
Adsorber
C.
Adsorbent
D.
Absorption
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Answer :
Option C
Explaination / Solution:
Surface on which adsorption occurs is known as adsorbent.
# Surface Chemistry
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q5.
Which of the following metal solution cannot be prepared by Bredig’s arc method?
A.
Copper
B.
Platinum
C.
Gold
D.
Potassium
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Answer :
Option D
Explaination / Solution:
Potassium due to very high reactivity, canot be used here.
# Surface Chemistry
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q6.
The average molecular mass of colloidal can be determined by
A.
Tyndall effect
B.
Osmotic pressure measurement
C.
Flocculation value
D.
None of these
View Solution
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Answer :
Option B
Explaination / Solution:
Average molecular mass of colloidal solution is determined by Osmotic Pressure measurement.
# Surface Chemistry
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q7.
Which of the following processes does not involve a catalyst?
A.
Thermite process
B.
Contact process
C.
Oswald process
D.
Haber process
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Answer :
Option A
Explaination / Solution:
Thermite process doesn’t require a catalyst.
# Surface Chemistry
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q8.
Which type of a property is the Brownian movement of colloidal solution?
A.
Electrical
B.
Electrochemical
C.
Mechanical
D.
Optical
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Answer :
Option C
Explaination / Solution:
Movement is always a mechanical property.
# Surface Chemistry
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q9.
Hydrophilic colloids are stable due to
A.
Negative charged particles
B.
Large size of particles
C.
Layer of dispersion medium on their particles
D.
Small size of particles
View Solution
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Answer :
Option C
Explaination / Solution:
This makes the colloid stable.
# Surface Chemistry
# CBSE 12TH CHEMISTRY
Prepare / Learn
Q10.
Which of the following methods is used for sol destruction?
A.
Addition of an electrolyte
B.
Dialysis
C.
Condensation
D.
Diffusion through semi permeable membrane
View Solution
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Answer :
Option A
Explaination / Solution:
Electrolyte makes the colloid destroy.
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