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Question-1
R.M.S velocity of a molecule is C at pressure P. If pressure is increased two times, then r.m.s velocity becomes
(A)
0.5 C
(B)
C
(C)
2 C
(D)
3 C
Question-2
The r.m.s velocity of nitrogen molecules at N.T.P is
(A)
33 m/s
(B)
493 m/s
(C)
517 m/s
(D)
546 m/s
Question-3
The number of degrees of freedom for molecules of a mono atomic gas is
(A)
3
(B)
4
(C)
5
(D)
6
Question-4
A gas at a temperature of 250 K is contained in a closed vessel. If the gas is heated through 1 K, then percentage increase in its pressure is
(A)
0.1 %
(B)
0.2 %
(C)
0.3 %
(D)
0.4 %
Question-5
Wien's law states that :
(A)
T + λ
m
= constant
(B)
λ
m
T= constant
(C)
λ
m
/T = constant
(D)
T
4
/ λ
m
= constant
Question-6
First law of thermodynamics is a consequence of conservation of
(A)
Work
(B)
Energy
(C)
Heat
(D)
All of these
Question-7
If an ideal gas has volume V at 27
o
C and it is heated at a constant pressure so that its volume becomes 1.5 V, then the value of final temperature is
(A)
327 K
(B)
873 K
(C)
177
o
C
(D)
600
o
C
Question-8
At what temperature is the r.m.s. speed of molecules of hydrogen twice that at S.T.P. ?
(A)
273 K
(B)
546 K
(C)
819 K
(D)
1092 K
Question-9
In an adiabatic process, the quantity which remains constant is
(A)
Volume
(B)
Pressure
(C)
Temperature
(D)
Total heat of the system
Question-10
The internal energy change in a system that has absorbed 2 k cal of heat and done 500 J of work is
(A)
8900 J
(B)
6400 J
(C)
5400 J
(D)
7900 J
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Plus 1 Computer Science
Tamil Nadu (English Medium)
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