Recommended MCQs - (NEW NCERT PATTERN) Thermodynamics Physics NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

Q1:

An ideal gas is taken reversibly around the cycle $a\text-b\text-c\text-d\text-a$ as shown on the temperature $(T)$ - entropy $(S)$ diagram.

The most appropriate representation of the above cycle on an internal energy $(U)$ - volume $(V)$ diagram is:

1.		2.
3.		4.

Subtopic: Basic Terms |

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Q2:

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, the pressure remains constant.
3.	In an isothermal process, the temperature remains constant.
4.	In an adiabatic process, $P V^\gamma$ = constant.

Subtopic: Types of Processes |

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NEET - 2009

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Q3:

Thermodynamic processes are indicated in the following diagram.

Match the following:

Column I		Column II
$P$ .	Process-I	$\mathrm{a}$ .	Adiabatic
$Q$ .	Process-II	$\mathrm{b}$ .	Isobaric
$R$ .	Process-III	$\mathrm{c}$ .	Isochoric
$S$ .	Process-IV	$\mathrm{d}$ .	Isothermal

1.	$P \rightarrow \mathrm{a}, Q \rightarrow \mathrm{c}, R \rightarrow \mathrm{d}, S \rightarrow \mathrm{b}$
2.	$P \rightarrow \mathrm{c}, Q \rightarrow \mathrm{a}, R \rightarrow \mathrm{d}, S \rightarrow b$
3.	$P \rightarrow \mathrm{c}, Q \rightarrow \mathrm{d}, R \rightarrow \mathrm{b}, S \rightarrow \mathrm{a}$
4.	$P \rightarrow \mathrm{c}, Q \rightarrow \mathrm{d}, R \rightarrow \mathrm{b}, S \rightarrow \mathrm{a}$

Subtopic: Types of Processes |

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NEET - 2017

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Q4:

A polyatomic gas $\left(\gamma = \frac{4}{3}\right)$ is compressed to $\frac{1}{8}$ of its volume adiabatically. If its initial pressure is $P_0,$ its new pressure will be:

1.	$8P_0$	2.	$16P_0$
3.	$6P_0$	4.	$2P_0$

Subtopic: Types of Processes |

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Q5:

Which of the following graph shows the variation of pressure P with volume V for an ideal gas at a constant temperature?

1.		2.
3.		4.

Subtopic: Types of Processes |

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Q6:

If an ideal gas undergoes two processes at constant volumes

V_{1} and V_{2}

$V_1~\text{and}~V_2$ as shown in the pressure-temperature

(P - T)

$(P\text-T)$ diagram, then:

1. $V_1= V_2$
2. $V_1> V_2$
3. $V_1< V_2$
4. $V_1\ge V_2$

Subtopic: Types of Processes |

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Q7:

Which of the following statements in the case of a thermodynamic process is not correct?
(the symbols carry their usual meaning)

1.	$\Delta E_{\text{int}}=W$ indicates an adiabatic process
2.	$\Delta E_{\text{int}}=Q$ suggests an isochoric process
3.	$\Delta E_{\text{int}}=0$ is true for a cyclic process
4.	$\Delta E_{\text{int}}=-W$ indicates an adiabatic processes

Subtopic: Types of Processes |

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Q8:

An ideal gas at

27^{\circ} C

$27^{\circ}\text{C}$ is compressed adiabatically to

\frac{8}{27}

$\frac{8}{27}$ of its original volume. If

γ = \frac{5}{3},

$\gamma = \frac{5}{3},$ then the rise in temperature will be:
1.

450 K

$450~\text{K}$
2.

375 K

$375~\text{K}$
3.

225 K

$225~\text{K}$
4.

405 K

$405~\text{K}$

Subtopic: Types of Processes |

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Q9:

Which one of the following processes is reversible?

1.	Transfer of heat by radiation
2.	Transfer of heat by conduction
3.	Isothermal compression
4.	Electrical heating of a nichrome wire

Subtopic: Types of Processes |

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AIPMT - 2005

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Q10:

Given below are two statements:

Statement I:	When $\mu$ amount of an ideal gas undergoes adiabatic change from state $\left({P}_1, {V}_1, {T}_1\right)$ to state $\left({P}_2, {V}_2, {T}_2\right)$ , the work done is ${W}=\dfrac{\mu{R}\left({T}_2-{T}_1\right)}{1-\gamma}$ , where $\gamma=\dfrac{C_P}{C_V}$ and $R=$ universal gas constant,
Statement II:	In the above case, when work is done on the gas, the temperature of the gas would rise.

1.	Both Statement I and Statement II are correct.
2.	Both Statement I and Statement II are incorrect.
3.	Statement I is correct, but statement II is incorrect.
4.	Statement I is incorrect, but statement II is correct.

Subtopic: Types of Processes |

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