1
JEE Main 2025 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The temperature of a body in air falls from $40^{\circ} \mathrm{C}$ to $24^{\circ} \mathrm{C}$ in 4 minutes. The temperature of the air is $16^{\circ} \mathrm{C}$. The temperature of the body in the next 4 minutes will be :

A
$\frac{28}{3}{ }^{\circ} \mathrm{C}$
B
$\frac{56}{3}{ }^{\circ} \mathrm{C}$
C
$\frac{42}{3}{ }^{\circ} \mathrm{C}$
D
$\frac{14}{3}{ }^{\circ} \mathrm{C}$
2
JEE Main 2025 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The magnitude of heat exchanged by a system for the given cyclic process ABCA (as shown in figure) is (in SI unit) :

JEE Main 2025 (Online) 24th January Evening Shift Physics - Heat and Thermodynamics Question 27 English

A
zero
B
40$\pi$
C
5$\pi$
D
10$\pi$
3
JEE Main 2025 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : In an insulated container, a gas is adiabatically shrunk to half of its initial volume. The temperature of the gas decreases.

Reason (R) : Free expansion of an ideal gas is an irreversible and an adiabatic process.

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

A
Both $(\mathbf{A})$ and $(\mathbf{R})$ are true and $(\mathbf{R})$ is the correct explanation of $(\mathbf{A})$
B
Both (A) and (R) are true but (R) is NOT the correct explanation of (A)
C
(A) is false but (R) is true
D
(A) is true but $(\mathbf{R})$ is false
4
JEE Main 2025 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following figure represents the relation between Celsius and Fahrenheit temperatures?

A
JEE Main 2025 (Online) 24th January Evening Shift Physics - Heat and Thermodynamics Question 28 English Option 1
B
JEE Main 2025 (Online) 24th January Evening Shift Physics - Heat and Thermodynamics Question 28 English Option 2
C
JEE Main 2025 (Online) 24th January Evening Shift Physics - Heat and Thermodynamics Question 28 English Option 3
D
JEE Main 2025 (Online) 24th January Evening Shift Physics - Heat and Thermodynamics Question 28 English Option 4
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