Select Chapter Topics:

1. \(10\) J

2. \(12\) J

3. \(36\) J

4. \(6\) J

Subtopic: Â First Law of Thermodynamics |

Â 81%

From NCERT

NEET - 2013

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Which of the following relations does not give the equation of an adiabatic process, where terms have their usual meaning?

1. \(\mathrm{P}^{1-\gamma} \mathrm{T}^\gamma= \text{constant}\)

2. \(\mathrm{PV}^\gamma=\text{ constant }\)

3. \(\mathrm{TV}^{\gamma-1}= \text{constant }\)

4. \(\mathrm{P}^{\gamma} \mathrm{T}^{1-\gamma}= \text{constant}\)

1. \(\mathrm{P}^{1-\gamma} \mathrm{T}^\gamma= \text{constant}\)

2. \(\mathrm{PV}^\gamma=\text{ constant }\)

3. \(\mathrm{TV}^{\gamma-1}= \text{constant }\)

4. \(\mathrm{P}^{\gamma} \mathrm{T}^{1-\gamma}= \text{constant}\)

Subtopic: Â Types of Processes |

Â 76%

From NCERT

NEET - 2013

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A monoatomic gas at pressure P_{1} and volume V_{1} is compressed adiabatically to 1/8th its original volume. What is the final pressure of the gas?

1. P_{1 }

2. 16 P_{1}

3. 32 P_{1 }

4. 64 P_{1 }

Subtopic: Â Types of Processes |

Â 79%

From NCERT

AIPMT - 2010

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At a pressure of \(2\) atmospheres, a mass of diatomic gas \((\gamma = 1.4)\), is compressed adiabatically, causing its temperature to rise from \(27^{\circ}\mathrm{C}\) to \(927^{\circ}\mathrm{C}\). The pressure of the gas in the final state is:

1. 8 atm

2. 28 atm

3. 68.7 atm

4. 256 atm

Subtopic: Â Types of Processes |

Â 62%

From NCERT

AIPMT - 2011

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An ideal gas goes from state \(A\) to state \(B\) via three different processes as indicated in the \((P\text-V)\) diagram.

If \(Q_1,Q_2,Q_3\)${\mathrm{}}_{}$ indicate the heat absorbed by the gas along the three processes and \(\Delta U_1, \Delta U_2, \Delta U_3\) indicate the change in internal energy along the three processes respectively, then:

1. | \(Q_3>Q_2>Q_1\) and \(\Delta U_1= \Delta U_2= \Delta U_3\) |

2. | \(Q_1=Q_2=Q_3\) and \(\Delta U_1> \Delta U_2> \Delta U_3\) |

3. | \(Q_3>Q_2>Q_1\) and \(\Delta U_1> \Delta U_2> \Delta U_3\) |

4. | \(Q_1>Q_2>Q_3\) and \(\Delta U_1= \Delta U_2= \Delta U_3\) |

Subtopic: Â First Law of Thermodynamics |

Â 79%

From NCERT

AIPMT - 2012

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The molar specific heat at a constant pressure of an ideal gas is \(\frac{7}{2}R.\) The ratio of specific heat at constant pressure to that at constant volume is:

1. \(\frac{7}{5}\)

2. \(\frac{8}{7}\)

3. \(\frac{5}{7}\)

4. \(\frac{9}{7}\)

Subtopic: Â Molar Specific Heat |

Â 77%

From NCERT

AIPMT - 2006

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A Carnot engine whose sink is at \(300~\mathrm{K}\) has an efficiency of \(40\)%. By how much should the temperature of the source be increased to increase its efficiency by \(50\)% of its original efficiency?

1. | \(275~\mathrm{K}\) | 2. | \(325~\mathrm{K}\) |

3. | \(250~\mathrm{K}\) | 4. | \(380~\mathrm{K}\) |

Subtopic: Â Carnot Engine |

Â 64%

From NCERT

AIPMT - 2006

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If \(Q\), \(E\), and \(W\) denote respectively the heat added, the change in internal energy, and the work done in a closed cycle process, then:

1. \(W=0\)

2. \(Q=W=0\)

3. \(E=0\)

4. \(Q=0\)

Subtopic: Â Cyclic Process |

Â 77%

From NCERT

AIPMT - 2008

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In thermodynamic processes which of the following statements is not true?

1. | In an adiabatic process, the system is insulated from the surroundings. |

2. | In an isochoric process, pressure remains constant. |

3. | In an isothermal process, the temperature remains constant. |

4. | In an adiabatic process \(PV^\gamma=\mathrm{constant}.\) |

Subtopic: Â Types of Processes |

Â 91%

From NCERT

AIPMT - 2009

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The internal energy change in a system that has absorbed \(2\) kcal of heat and done \(500\) J of work is:

1. \(8900\) J

2. \(6400\) J

3. \(5400\) J

4. \(7900\) J

Subtopic: Â First Law of Thermodynamics |

Â 78%

From NCERT

AIPMT - 2009

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