Practising JEE Main mock tests is crucial for effective exam preparation. These tests help students understand the exam pattern, improve time management, and identify strengths and weaknesses. Regular practice boosts confidence, enhances problem-solving speed, and ensures better performance in the actual exam.

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JEE Main Heat and Thermodynamics Practice Questions with Solutions

The JEE Main Heat and Thermodynamics Practice Test is an essential resource for all JEE Main aspirants to learn about the main concepts of heat and thermodynamics and improve their knowledge of this chapter. The JEE Main Heat and Thermodynamics Practice Questions with Solutions have a variety of questions from heat and thermodynamics for students to practice and strengthen their chemistry section for the JEE Main entrance test. About 2 to 4 questions may appear from Heat and Thermodynamics in the JEE Main question paper. Usually, the question will be in the form of multiple choice questions as well as numerical value questions, testing both your conceptual knowledge and numerical abilities. JEE Main is a highly competitive entrance exam for all engineering aspirants. Therefore, it is essential for candidates to attempt these practice tests at least once a week to develop knowledge and precision of the topic.

The important topics of the Heat and Thermodynamics chapter, from which questions may appear, are Thermodynamic Processes, Kinetic Theory of Gases, the Laws of Thermodynamics, Enthalpy, Entropy, & Internal Energy, Specific Heat & Calorimetry, Heat Engines & Refrigerators, and PV Diagrams & Work Calculations. The practice tests, containing questions on all these topics along with their detailed solutions, will allow aspirants to understand the basic concepts well by going through the detailed explanations provided.

Thoroughly practising the JEE Main Heat and Thermodynamics Practice Questions with Solutions on a regular basis will help students to improve their accuracy and manage their time better during the examination. It will also allow them to understand their weak areas, work on them, and gain confidence in solving questions from this topic with ease in the JEE Main exam.

JEE Main Physics Heat and Thermodynamics Practice Questions

Mathematics Chemistry

Question 1.

A real gas within a closed chamber at $27^{\circ} C$ undergoes the cyclic process as shown in figure. The gas obeys $P V^{3} = R T$ equation for the path $A$ to $B$ . The net work done in the complete cycle is (assuming $R = 8 J / mol K$ ):

JEE Main 2024 (Online) 9th April Evening Shift Physics - Heat and Thermodynamics Question 21 English

- 20

205J

225J

20J

Question 2.

The temperature of a gas is $- 78^{\circ} C$ and the average translational kinetic energy of its molecules is $K$ . The temperature at which the average translational kinetic energy of the molecules of the same gas becomes $2 K$ is :

- 78^{\circ} C

127^{\circ} C

- 39^{\circ} C

117^{\circ} C

Question 3.

The volume of an ideal gas $(γ = 1.5)$ is changed adiabatically from 5 litres to 4 litres. The ratio of initial pressure to final pressure is :

\frac{4}{5}

\frac{8}{5 \sqrt{5}}

\frac{2}{\sqrt{5}}

\frac{16}{25}

Question 4.

A sample of 1 mole gas at temperature $T$ is adiabatically expanded to double its volume. If adiab constant for the gas is $γ = \frac{3}{2}$ , then the work done by the gas in the process is :

R T [2 + \sqrt{2}]

RT [2 - \sqrt{2}]

\frac{R}{T} [2 - \sqrt{2}]

\frac{T}{R} [2 + \sqrt{2}]

Question 5.

A diatomic gas $(γ = 1.4)$ does $100 J$ of work in an isobaric expansion. The heat given to the gas is :

150 J

490 J

350 J

250 J

Question 6.

Given below are two statements :

Statement (I) : The mean free path of gas molecules is inversely proportional to square of molecular diameter.

Statement (II) : Average kinetic energy of gas molecules is directly proportional to absolute temperature of gas.

In the light of the above statements, choose the correct answer from the options given below :

Statement I is false but Statement II is true

Both Statement I and Statement II are true

Statement I is true but Statement II is false

Both Statement I and Statement II are false

Question 7.

A mixture of one mole of monoatomic gas and one mole of a diatomic gas (rigid) are kept at room temperature $(27^{\circ} C)$ . The ratio of specific heat of gases at constant volume respectively is:

\frac{3}{2}

\frac{3}{5}

\frac{7}{5}

\frac{5}{3}

Question 8.

Two different adiabatic paths for the same gas intersect two isothermal curves as shown in P-V diagram. The relation between the ratio $\frac{V_{a}}{V_{d}}$ and the ratio $\frac{V_{b}}{V_{c}}$ is:

JEE Main 2024 (Online) 8th April Morning Shift Physics - Heat and Thermodynamics Question 10 English

\frac{V_{a}}{V_{d}} \neq \frac{V_{b}}{V_{c}}

\frac{V_{a}}{V_{d}} = {(\frac{V_{b}}{V_{c}})}^{- 1}

\frac{V_{a}}{V_{d}} = \frac{V_{b}}{V_{c}}

\frac{V_{a}}{V_{d}} = {(\frac{V_{b}}{V_{c}})}^{2}

Question 9.

Given below are two statements:

Statement (I) : Dimensions of specific heat is $[L^{2} T^{- 2} K^{- 1}]$ .

Statement (II) : Dimensions of gas constant is $[M L^{2} T^{- 1} K^{- 1}]$ .

In the light of the above statements, choose the most appropriate answer from the options given below.

Statement (I) is incorrect but statement (II) is correct

Both statement (I) and statement (II) are incorrect

Both statement (I) and statement (II) are correct

Statement (I) is correct but statement (II) is incorrect