1
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
A gas is compressed isothermally to half its initial volume. The same gas is compressed separately through an adiabatic process until its volume is again reduced to half. Then
A
Compressing the gas isothermally or adiabatically will require the same amount of work.
B
Which of the case (whether compression through isothermal or through adiabatic process) requires more work will depend upon the atomicity of the gas.
C
Compressing the gas isothermally will require more work to be done.
D
Compressing the gas through adiabatic process will require more work to be done.
2
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
The molecules of a given mass of a gas have r.m.s. velocity of 2000 m s$$-$$1 at 27oC and 1.0 $$ \times $$ 105 N m$$-$$2 pressure. When the temperature and pressure of the gas are respectively, 127oC and 0.05 $$ \times $$ 105 N m$$-$$2, the r.m.s. velocity of its molecules in m s$$-$$1 is
A
$${{100\sqrt 2 } \over 3}$$
B
$${{100} \over 3}$$
C
$$100\sqrt 2 $$
D
$${{400} \over {\sqrt 3 }}$$
3
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
Two vessels separately contain two ideal gases A and B at the same temperature, the pressure of A being twice that of B. Under such conditions, the density of A is found to be 1.5 times the density of B. The ratio of molecular weight of A and B is
A
2
B
$${1 \over 2}$$
C
$${2 \over 3}$$
D
$${3 \over 4}$$
4
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is $$-$$20oC, the temperature of the surroundings to which it rejects heat is
A
11oC
B
21oC
C
31oC
D
41oC
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