Matter UPSC Questions

Physics

Matter MCQ Questions


7.
Who proposed the law regarding the partial pressure ?
A.
Dalton
B.
Charles
C.
Thomas
D.
Lussac
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ANSWER :
A. Dalton
8.
When a teaspoon of solid sugar is dissolved in a glass of liquid water, what phase or phases are present after mixing
A.
Liquid only
B.
Solid and liquid
C.
Solid only
D.
None of the above
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ANSWER :
A. Liquid only
9.
Equal volumes of all gases under similar conditions of temperature and pressure contain equal numbers of molecules. This statement was made by
A.
Berzilius
B.
Avogadro
C.
Gay- lussae
D.
John Dalton
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ANSWER :
B. Avogadro
10.
Rate of dissusion of a gas is
A.
Directly proportional to its density
B.
Directly proportional to its molecular mass
C.
Inversely proportional to the square root of its density
D.
Inversely proportional to the square root of its molecular mass
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ANSWER :
D. Inversely proportional to the square root of its molecular mass
11.
Which of the following phenomena would increase on raising the temperature?
A.
Diffusion, evaporation, compression of gases
B.
Evaporation, compression of gases, solubility
C.
Evaporation, diffusion, expansion of gases
D.
Evaporation, solubility, diffusion, compression of gases
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ANSWER :
C. Evaporation, diffusion, expansion of gases
12.

In which of the following conditions, the distance between the molecules of hydrogen gas would increase?
(i) Increasing pressure on hydrogen contained in a closed container
(ii) Some hydrogen gas leaking out of the container
(iii) Increasing the volume of the container of hydrogen gas
(iv) Adding more hydrogen gas to the container without increasing the volume of the container

A.

(i) and (iv) only

B.

(i) and (ii) only

C.

(ii) and (iv) only

D.

(ii) and (iii) only

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ANSWER :

D. (ii) and (iii) only