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1
JEE Main 2018 (Online) 15th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
A Carnot's engine works as a refrigerator between $$250$$ K and $$300$$ K. It receives $$500$$ cal heat from the reservoir at the lower temperature. The amount of work done in each cycle to operate the refrigerator is :
A
$$420$$ $$J$$
B
$$772$$ $$J$$
C
$$2100$$ $$J$$
D
$$2520$$ $$J$$
2
JEE Main 2018 (Online) 15th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
One mole of an ideal monoatomic gas is compressed isothermally in a rigid vessel to double its pressure at room temperature, $${27^ \circ }C.$$ The work done on the gas will be :
A
$$300$$ $$R$$
B
$$300$$ $$R$$ $$ln$$ $$6$$
C
$$300$$ $$R$$ $$ln$$ $$2$$
D
$$300$$ $$R$$ $$ln$$ $$7$$
3
JEE Main 2017 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
N moles of a diatomic gas in a cylinder are at a temperature T. Heat is supplied to the cylinder such that the temperature remains constant but n moles of the diatomic gas get converted into monoatomic gas. What is the change in the total kinetic energy of the gas ?
A
$${1 \over 2}$$ nRT
B
0
C
$${3 \over 2}$$ nRT
D
$${5 \over 2}$$ nRT
4
JEE Main 2017 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
For the P-V diagram given for an ideal gas,

JEE Main 2017 (Online) 9th April Morning Slot Physics - Heat and Thermodynamics Question 253 English

out of the following which one correctly represents the T-P diagram ?
A
JEE Main 2017 (Online) 9th April Morning Slot Physics - Heat and Thermodynamics Question 253 English Option 1
B
JEE Main 2017 (Online) 9th April Morning Slot Physics - Heat and Thermodynamics Question 253 English Option 2
C
JEE Main 2017 (Online) 9th April Morning Slot Physics - Heat and Thermodynamics Question 253 English Option 3
D
JEE Main 2017 (Online) 9th April Morning Slot Physics - Heat and Thermodynamics Question 253 English Option 4
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