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1(current)

Q. No.

Q1:

Reversible expansion of an ideal gas under isothermal and adiabatic conditions are shown in the figure:

AB $\to$ Isothermal expansion

AC $\to$ Adiabatic expansion

Which of the following options is not correct?

1. $∆ S_{i s o t h e r m a l} > ∆ S_{a d i a b a t i c}$

2. $T_{A} = T_{B}$

3. $W_{i s o t h e r m a l} > W_{a d i a b a t i c}$

4. $T_{C} > T_{A}$

Subtopic: 2nd & 3rd Law of Thermodynamics |

55%

Level 3: 35%-60%

NEET - 2019

1(12%)

2(17%)

3(17%)

4(56%)

Hints

Q2:

Identify the correct statement regarding entropy:

1.	At absolute zero of temperature, the entropy of all crystalline substances is taken to be zero.
2.	At absolute zero of temperature, the entropy of a perfectly crystalline substance is positive.
3.	At absolute zero of temperature, the entropy of a perfectly crystalline substance is taken to be zero.
4.	At 0 °C , the entropy of a perfectly crystalline substance is taken to be zero.

Subtopic: 2nd & 3rd Law of Thermodynamics |

70%

Level 2: 60%+

AIPMT - 1998

1(19%)

2(7%)

3(70%)

4(6%)

Hints

1(current)

Q. No.

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