States of Matter AFCAT Questions

AFCAT Chemistry

States of Matter MCQ Questions


13.
Graham's law of diffusion states that the rate of diffusion of a gas is:
A.
Independent of molar mass
B.
Directly proportional to its density
C.
Inversely proportional to the square root of its density
D.
Directly proportional to its molar mass
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ANSWER :
C. Inversely proportional to the square root of its density
14.
Dalton's law of partial pressures states that the total pressure of a mixture of non-reacting gases equals:
A.
The average of partial pressures
B.
The pressure of the heaviest gas
C.
The product of partial pressures
D.
The sum of partial pressures of individual gases
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ANSWER :
D. The sum of partial pressures of individual gases
15.
Which of the following is a characteristic property of solids?
A.
Definite shape and definite volume
B.
Indefinite shape and definite volume
C.
Indefinite shape and indefinite volume
D.
Definite shape and indefinite volume
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ANSWER :
A. Definite shape and definite volume
16.
In a crystalline solid, the constituent particles are arranged in:
A.
Concentric circles
B.
A regular, repeating three-dimensional pattern
C.
A two-dimensional pattern only
D.
A random pattern
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ANSWER :
B. A regular, repeating three-dimensional pattern
17.
Which of the following is an example of an amorphous solid?
A.
Sodium chloride
B.
Quartz
C.
Diamond
D.
Glass
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ANSWER :
D. Glass
18.
The melting point of an amorphous solid is:
A.
Sharp and definite
B.
Always below 0°C
C.
Not sharp; it softens over a range of temperatures
D.
Always above 1000°C
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ANSWER :
C. Not sharp; it softens over a range of temperatures