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Question-1
110 J of heat is added to a gaseous system, whose internal energy is 40 J, then the amount of external work done is
(A)
150 J
(B)
70 J
(C)
110 J
(D)
40 J
Question-2
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-3
First law of thermodynamics is a consequence of conservation of
(A)
Work
(B)
Energy
(C)
Heat
(D)
All of these
Question-4
In thermodynamic processes which of the following statements is not true?
(A)
In an adiabatic process the system is insulated from the surroundings
(B)
In an isochoric process pressure remains constant
(C)
In an isothermal process the temperature remains constant
(D)
In an adiabatic process pV
γ
= constant
Question-5
Initial pressure and volume of a gas are P and V respectively. First the gas is expanded isothermally to 4V and then its volume is made V by adiabatic process. Its final pressure (γ = 1.5) is
(A)
8 P
(B)
4 P
(C)
P
(D)
2 P
Question-6
Air is filled at 60
o
C in a vessel with open mouth. The vessel is heated to a temperature T so that 1/4
th
part of air escapes. Assuming the volume of vessel remains constant, the value of T is
(A)
80
o
C
(B)
143
o
C
(C)
333
o
C
(D)
416
o
C
Question-7
In an adiabatic process, the quantity which remains constant is
(A)
Volume
(B)
Pressure
(C)
Temperature
(D)
Total heat of the system
Question-8
Heat capacity of a body is infinite. It means
(A)
Heat is given out
(B)
Heat is taken in
(C)
No change in temperature whether heat is taken in or given out
(D)
All of these
Question-9
An electric fan is switched on in a closed room. The air in the room
(A)
Is cooled
(B)
Is heated
(C)
Maintains its temperature
(D)
Is heated or cooled depending upon atmosphere pressure
Question-10
Water falls from a height of 500 m. What is the rise in temperature of water at the bottom if the whole energy is used up in heating water ?
(A)
0.96
o
C
(B)
1.02
o
C
(C)
1.16
o
C
(D)
0.25
o
C
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Plus 1 Biology Science
Tamil Nadu (English Medium)
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