Matter UPSC Questions

Physics

Matter MCQ Questions


13.
During summer, water kept in an earthen pot becomes cool because of the phenomenon of
A.
Diffusion
B.
Transpiration
C.
Osmosis
D.
Evaporation
😑 View Answer Rough Work Error
ANSWER :
D. Evaporation
14.

Stefan- Boltzmann constant has the value in SI unit as

A.

5.67x108 Wm-2 K-4

B.

5.67x10-8 Wm-2 K-4

C.

56.7x108 Wm-2 K-4

D.

56.7x108 Wm K-4

😑 View Answer Rough Work Error
ANSWER :

B. 5.67x10-8 Wm-2 K-4

15.
The boiling points of diethyl ether, acetone and n-butyl alcohol are 35°C, 56°C and 118°C respectively. Which one of the following correctly represents their boiling points in Kelvin scale?
A.
306 K, 329 K and 391 K
B.
308 K, 329 K and 392 K
C.
308 K, 329 K and 391 K
D.
329 K, 392 K and 308 K
😑 View Answer Rough Work Error
ANSWER :
C. 308 K, 329 K and 391 K
16.
Why does the size of napthalene balls decrease when left open ?
A.
Due to fusion
B.
Due to sublimation
C.
Due to evaporation
D.
None of the above
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ANSWER :
B. Due to sublimation
17.
The molecule move only within a boundary of
A.
Liquid
B.
Gases
C.
Solids
D.
None of the above
😑 View Answer Rough Work Error
ANSWER :
A. Liquid
18.

Match the following

List I List II
a) Have Mass 1.) Solids, liquids and gases
b) Have a definite volume but no definite shape 2.) Liquids only
c) Are highly rigid and have a definite shape 3.) Solid only
d) Are highly compressible and less rigid 4.) Gases only
A.

a-1,b-2,c-3,d-4

B.

a-3,b-2,c-1,d-4

C.

a-2,b-4,c-1,d-3

D.

a-4,b-3,c-2,d-1

😑 View Answer Rough Work Error
ANSWER :

A. a-1,b-2,c-3,d-4