Heat, Latent heat , Specific heat capacity and Temperature – JEE Main Study Material

Question

Dimensional formula of heat (Q) is

A.	$[M^{0}L^{2}T^{-2}]$
B.	$[M^{1}L^{2}T^{-2}]$
C.	$[M^{2}L^{1}T^{-2}]$
D.	$[M^{1}L^{2}T^{-1}]$

Question

C.G.S unit of Latent heat is :

A.	$Newton$
B.	$sec$
C.	$\frac{cal}{g}$
D.	$g$

Question

Asked in: JEE Main-2023

Match List I with List II:

Choose the correct answer from the options given below:

A.	A-II, B – III, C-I, D-IV
B.	A-II, B – III, C-IV, D-I
C.	A-III, B – II, C-IV, D-I
D.	A-III, B – II, C-I, D-IV

Question

The latent heat of vaporisation of a substance is always

A.	Greater than its latent heat of fusion
B.	Greater than its latent of sublimation
C.	Equal to its latent heat of sublimation
D.	Equal to latent heat of fusion

Question

The quantity of heat required to change the unit mass of a solid substance from solid state to liquid state is defined as

A.	Latent heat of vaporisation
B.	Latent heat of fusion
C.	Specific heat at constant pressure
D.	Specific heat at constant volume

Question

Calculate the amount of heat required to melt 500 g ice at $0^0 c$ to water at $0^0 c$ (the latent heat of ice $=80 \mathrm{cal} / \mathrm{gm}$ )

A.	$40 \times 10^5 \mathrm{cal}$
B.	$40 \times 10^3 \mathrm{cal}$
C.	$80 \times 10^3 \mathrm{cal}$
D.	$20 \times 10^3 \mathrm{cal}$

Question

Water is used to cool the radiator of engines because -

A.	It is easily available
B.	It has high specific heat
C.	It has high thermal conductivity
D.	It has low thermal conductivity

Question

Asked in: JEE Main-2024

The dimensional formula of latent heat is:

A.	$\left[\mathrm{M}^0 \mathrm{LT}^{-2}\right]$
B.	$\left[\mathrm{MLT}^{-2}\right]$
C.	$\left[\mathrm{M}^0 \mathrm{~L}^2 \mathrm{~T}^{-2}\right]$
D.	$\left[\mathrm{ML}^2 \mathrm{~T}^{-2}\right]$

Question

Asked in: KVPY SA-2017

Two different liquids of same mass are kept in two identical vessels, which are placed in a freezer that extracts heat from them at the same rate causing each liquid to transform into a solid. The schematic figure below shows the temperature $T$ vs time t plot for the two materials. We denote the specific heat in the liquid state to be $C_{L 1}$ and $C_{L 2}$ for material 1 and 2 respectively, and latent heats of fusion $U_1$ and $U_2$ respectively.

choose the correct option

A.	$C_{L 1}>C_{L 2}$ and $U_1<U_2$
B.	$C_{L 1}>C_{L 2}$ and $U_1>U_2$
C.	$C_{L 1}<C_{L 2}$ and $U_1>U_2$
D.	$C_{L 1}<C_{L 2}$ and $U_1<U_2$

Question

If an average person jogs, he produces $14.5 \times 10^3 \mathrm{cal} / \mathrm{min}$. This is removed by the evaporation of sweat. The amount of sweat (in kg) evaporated per minute (assuming 1 kg requires $580 \times 10^3$ call for evaporation) is

A.	0.025
B.	2.25
C.	0.05
D.	0.20

Question

Asked in: JEE Main-2025

Match List - I with List - II

List - I	List - II
(A) Angular Impulse	(I) $\quad\left[\mathrm{M}^0 \mathrm{~L}^2 \mathrm{~T}^{-2}\right]$
(B) Latent Heat	(II) $\left[\mathrm{M} \mathrm{L}^{-1} \mathrm{T}^{-3} \mathrm{~A}^{-1}\right]$
(C) Electrical resistivity	(III) $\left[\mathrm{M}^{-1} \mathrm{~T}^{-1}\right]$
(D) Electromotive force	(IV) $\left[M L^3 \mathrm{~T}^{-3} \mathrm{~A}^{-2}\right]$

Choose the correct answer from the options given below :

A.	(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
B.	(A)-(I), (B)-(III), (C)-(IV), (D)-(II)
C.	(A)-(III), (B)-(I), (C)-(II), (D)-(IV)
D.	(A)-(II), (B)-(I), (C)-(IV), (D)-(III)

Question

Asked in: JEE Main-2025

Match List-I with List-II.

List-I	List-II
(A) Heat capacity of body	(I) $\mathrm{J} \mathrm{kg}^{-1}$
(B) Specific heat capacity of body	(II) $\mathrm{JK}^{-1}$
(C) Latent heat	(III) $\mathrm{J} \mathrm{kg}^{-1} \mathrm{~K}^{-1}$
(D)Thermal conductivity	(IV) $\mathrm{Jm}^{-1} \mathrm{~K}^{-1} \mathrm{~s}^{-1}$

Choose the correct answer from the options given below :

A.	(A) - (III), (B)-(I), (C)-(II), (D)-(IV)
B.	(A)-(IV), (B)-(III), (C)-(II), (D)-(I)
C.	(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
D.	(A)-(II), (B)-(III), (C)-(I), (D)-(IV)

Exam	Chapter
JEE MAIN	Physics and Measurement

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Heat, Latent heat , Specific heat capacity and Temperature - (Concept)

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