Engineering Entrance Sample Papers

Surface Chemistry Question Bank

surface chemistry multiple choice questions

Surface Chemistry Practice Test Questions

Question 1
A
Neutral particles
B
Positively charged particles
C
Negatively as well as positively charged particles
D
Negatively charged particles
Question 2
The ability of a catalyst to accelerate the chemical reaction is known as
A
Negative catalyst
B
None of these
C
Activity
D
Selectively
Question 3
Emulsifiers are generally
A
All of these
B
Soap
C
Synthetic detergents
D
Lyophilic sols
Question 4
Chemisorption
A
Either increases or decreases with temperature
B
Remains unaffected by change of temperature
C
Increases with temperature
D
Decreases with temperature
Question 5
Which of the following catalyses the conversion of glucose into ethanol?
A
Zymase
B
Diastase
C
Maltase
D
Invertase
Question 6
0.2 gm of fine animal charcoal is mixed with half litre of acetic acid solution and shaken for 30 minutes
A
Concentration of the solution decrease
B
None of these
C
Concentration remains same
D
Concentration increases
Question 7
Peptising agent is
A
Always an electrolyte
B
A lyophilic colloid
C
Electrolyte or non-electrolyte
D
Always a non-electrolyte
Question 8
Which of the following types of metals form the most efficient catalysts?
A
Transition metals
B
All of these
C
Alkaline earth metals
D
Alkali metals
Question 9
Which of the following is contributed towards the extra stability of lyophilic colloids?
A
Charge
B
Tyndall effect
C
Colour
D
Hydration
Question 10
Which of the following is a lyophilic colloid?
A
Gum
B
Blood
C
Fog
D
Milk
Question 11
The coagulation of 100 ml of a colloidal sol of gold is completely prevented by addition of 0.25 g of a substance `X' to it before adding 10 ml of 1% NaCl solution. The gold number of `X' is
A
0.25
B
250
C
2.5
D
25
Question 12
If the dispersed phase is a liquid and the dispersion medium is a solid, the colloid is known as
A
A foam
B
A sol
C
An emulsion
D
A gel
Question 13
On addition of one ml of 10% NaCl solution to 10 ml gold sol in the presence of 0.25 gm of starch. The coagulation is just prevented, starch has gold number
A
2.5
B
0.025
C
0.25
D
None
Question 14
Organic catalysts differ from inorganic catalysts
A
By acting at low temperature
B
Being used up
C
Being proteinous in nature
D
By acting at very high temperature
Question 15
In emulsions, the dispersion medium and dispersed phase are
A
Both gases
B
One is solid and other is liquid
C
Both liquids
D
Both solids
Question 16
Milk is an example of

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A
Gel
B
Pure solution
C
Emulsion
D
Suspension
Question 17
Detergent action of soap is due to
A
High molecular weight
B
Emulsification properties
C
Ionization
D
Hydrolysis
Question 18
A biological catalyst is essentially

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A
The nitrogen molecule
B
A carbohydrate
C
An amino acid
D
An enzyme
Question 19
Which one of the following is not a property of hydrophilic sols?

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A
High concentrations of dispersed phase can be easily attained
B
The charge of the particle depends on the pH values of the medium; it may be positive, negative or even zero
C
Viscosity and surface tension are about the same as for water
D
Coagulation is reversible
Question 20
A catalyst is used
A
For altering the velocity of the reaction
B
Only for increasing the velocity of the reaction
C
Only for decreasing the velocity of the reaction
D
All are correct
There are 20 questions to complete.
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Vishal Arora

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