JEE Main 2025 · 04 Apr 2025 · Shift 1

Q1.The mean free path and the average speed of oxygen molecules at 300 K and 1 atm are $3\times 10^{-7}\mathrm{m}$ and $600\mathrm{m}/\mathrm{s}$, respectively. Find the frequency of its collisions.

Q2.A small mirror of mass m is suspended by a massless thread of length $l$. Then the small angle through which the thread will be deflected when a short pulse of laser of energy E falls normal on the mirror
( $\mathrm{c}=$ speed of light in vacuum and $\mathrm{g}=$ acceleration due …

Q3.Two liquids A and B have ${\theta }_{\mathrm{A}}$ and ${\theta }_{\mathrm{B}}$ as contact angles in a capillary tube. If $K=\cos {\theta }_A/\cos {\theta }_B$, then identify the correct statement:

Q4.Which of the following are correct expression for torque acting on a body?
A. $\vec{\tau }=\overrightarrow{\mathrm{r}}\times \overrightarrow{\mathrm{L}}$
B. $\vec{\tau }=\frac{d}{dt}(\vec{r}\times \vec{p})$
C. …

Q5.In a Young's double slit experiment, the slits are separated by 0.2 mm. If the slits separation is increased to 0.4 mm, the percentage change of the fringe width is:

Q6.An alternating current is represented by the equation, $\mathrm{i}=100\sqrt{2}\sin (100\pi \mathrm{t})$ ampere. The RMS value of current and the frequency of the given alternating current are

Q7.Consider the sound wave travelling in ideal gases of $\mathrm{He}$, ${\mathrm{CH}}_4$, and ${\mathrm{CO}}_2$. All the gases have the same ratio $\frac{P}{\rho }$, where $P$ is the pressure and $\rho$ is the density. The ratio of the speed of sound through the gases …

Q8.In an electromagnetic system, the quantity representing the ratio of electric flux and magnetic flux has dimension of ${\mathrm{M}}^{\mathrm{P}}{\mathrm{L}}^{\mathrm{Q}}{\mathrm{T}}^{\mathrm{R}}{\mathrm{A}}^{\mathrm{S}}$, where value of ' Q ' and ' R ' are

Q9.When an object is placed 40 cm away from a spherical mirror an image of magnification $\frac{1}{2}$ is produced. To obtain an image with magnification of $\frac{1}{3}$, the object is to be moved :

Q10.Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R

Assertion A: In photoelectric effect, on increasing the intensity of incident light the stopping potential increases.

Reason R : Increase in intensity of light increases the rat …

Q11.If $\overrightarrow{\mathrm{L}}$ and $\overrightarrow{\mathrm{P}}$ represent the angular momentum and linear momentum respectively of a particle of mass ' m ' having position vector …

Q12.A body of mass $m$ is suspended by two strings making angles ${\theta }_1$ and ${\theta }_2$ with the horizontal ceiling with tensions ${\mathrm{T}}_1$ and ${\mathrm{T}}_2$ simultaneously. ${\mathrm{T}}_1$ and ${\mathrm{T}}_2$ are related by $T_1=\sqrt{3}{T}_2$. the angles …

Q13.Current passing through a wire as function of time is given as $I(t)=0.02t+0.01\text{ A}$. The charge that will flow through the wire from $t=1\text{ s}$ to $t=2\text{ s}$ is :

Q14.Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R
Assertion A : The kinetic energy needed to project a body of mass m from earth surface to infinity is $\frac{1}{2}mgR$, where $R$ is the radius of earth.
Reason R : The maximum …

Q15.The Boolean expression $Y=A\overline{B}C+\overline{A}\overline{C}$ can be realised with which of the following gate configurations.
A. One 3-input AND gate, 3 NOT gates and one 2input OR gate, One 2-input AND gate,
B. One 3-input AND gate, 1 NOT gate, One 2input NOR gate and o …

Q16.In an experiment with a closed organ pipe, it is filled with water by $\left(\frac{1}{5}\right)$ th of its volume. The frequency of the fundamental note will change by

Q17.Two simple pendulums having lengths $l_1$ and $l_2$ with negligible string mass undergo angular displacements ${\theta }_1$ and ${\theta }_2$, from their mean positions, respectively. If the angular accelerations of both pendulums are same, then which expression is correct?

Q18.Two infinite identical charged sheets and a charged spherical body of charge density '$\rho$' are arranged as shown in figure. Then the correct relation between the electrical fields at A, B, C and D points is :

Q19.Two small spherical balls of mass 10 g each with charges $-2\mu \text{C}$ and $2\mu \text{C}$, are attached to two ends of very light rigid rod of length 20 cm. The arrangement is now placed near an infinite nonconducting charge sheet with uniform charge density of …

Q20.Considering the Bohr model of hydrogen like atoms, the ratio of the ratio of the radius $5^{\text{th}}$ orbit of the electron in ${\text{Li}}^{2+}$ and ${\text{He}}^{+}$ is

Q21.A circular ring and a solid sphere having same radius roll down on an inclined plane from rest without slipping. The ratio of their velocities when reached at the bottom of the plane is $\sqrt{\frac{x}{5}}$ where $x=$ ______.

Q22.Two slabs with square cross section of different materials $(1,2)$ with equal sides $(l)$ and thickness $d_1$ and $d_2$ such that $d_2=2d_1$ and $l>d_2$. Considering lower edges of these slabs are fixed to the floor, we apply equal shearing force on the narrow faces. T …

Q23.Distance between object and its image (magnified by $-\frac{1}{3}$) is 30 cm. The focal length of the mirror used is $\left(\frac{x}{4}\right)$ cm, where magnitude of value of $x$ is ______.

Q24.Four capacitor each of capacitance $16\mu \text{F}$ are connected as shown in the figure. The capacitance between points A and B is : ______ (in $\mu \text{F}$).

Q25.Conductor wire ABCDE with each arm 10 cm in length is placed in magnetic field of $\frac{1}{\sqrt{2}}$ Tesla, perpendicular to its plane. When conductor is pulled towards right with constant velocity of $10\mathrm{cm}/\mathrm{s}$, induced emf between points A and E is
______ …

Q1.$XY$ is the membrane / partition between two chambers 1 and 2 containing sugar solutions of concentration ${\mathrm{c}}_1$ and ${\mathrm{c}}_2\left({\mathrm{c}}_1>{\mathrm{c}}_2\right)\mathrm{mol}{\mathrm{L}}^{-1}$. For the reverse osmosis to take place identify the correct …

Q2.Let us consider a reversible reaction at temperature, T.

In this reaction, both $\Delta \mathrm{H}$ and $\Delta \mathrm{S}$ were observed to have positive values. If the equilibrium temperature is Te, then the reaction becomes spontaneous at:

Q3.Which of the following molecules(s) show/s paramagnetic behavior?
(A) ${\mathrm{O}}_2$
(B) ${\mathrm{N}}_2$
(C) ${\mathrm{F}}_2$
(D) ${\mathrm{S}}_2$
(E) ${\mathrm{Cl}}_2$

Choose the correct answer from the options given below:

Q4.Aldol condensation is a popular and classical method to prepare $\alpha ,\beta$-unsaturated carbonyl compounds. This reaction can be both intermolecular and intramolecular. Predict which one of the following is not a product of intramolecular aldol condensation?

Q5.One mole of an ideal gas expands isothermally and reversibly from $10{\mathrm{dm}}^3$ to $20{\mathrm{dm}}^3$ at $300\mathrm{K}$. $\Delta \mathrm{U}$, q and work done in the process respectively are:
Given: $\mathrm{R}=8.3{\mathrm{JK}}^{-1}$ and mol${}^{-1}$
In …

Q6.Which one of the following complexes will have ${\Delta }_0=0$ and $\mu =5.96$ B.M.?

Q7.For $\overline{{\mathrm{A}}_2+{\mathrm{B}}_2\rightleftharpoons 2\mathrm{AB}}$
${\mathrm{E}}_{\mathrm{a}}$ for forward and backward reaction are 180 and $200\mathrm{kJ}{\mathrm{mol}}^{-1}$ respectively
If catalyst lowers ${\mathrm{E}}_{\mathrm{a}}$ for both reaction by …

Q8.Rate law for a reaction between A and B is given by
$\mathrm{R}=\mathrm{k}[\mathrm{A}{]}^{\mathrm{n}}[\mathrm{B}{]}^{\mathrm{m}}$
If concentration of A is doubled and concentration of B is halved from their initial value, the ratio of new rate of reaction to the initial rate of rea …

Q9.Number of stereoisomers possible for the complexes, $\left[{\mathrm{CrCl}}_3(\mathrm{py}{)}_3\right]$ and ${\left[{\mathrm{CrCl}}_2(\mathrm{ox}{)}_2\right]}^{3-}$ are respectively
(py = pyridine, ox = oxalate)

Q10.On charging the lead storage battery, the oxidation state of lead changes from ${\mathrm{x}}_1$ to ${\mathrm{y}}_1$ at the anode and from $x_2$ to $y_2$ at the cathode. The values of ${\mathrm{x}}_1,{\mathrm{y}}_1,{\mathrm{x}}_2,{\mathrm{y}}_2$ are respectively:

Q11.Given below are two statements:

Statement I: Nitrogen forms oxides with +1 to +5 oxidation states due to the formation of $\mathrm{p}\underline{\pi }-\mathrm{p}\pi$ bond with oxygen.
Statement II: Nitrogen does not form halides with +5 oxidation state due to the absence of d-or …

Q12.Benzene is treated with oleum to produce compound ( X ) which when further heated with molten sodium hydroxide followed by acidification produces compound (Y).The compound Y is treated with zinc metal to produce compound (Z). Identify the structure of compound (Z) from the follow …

Q13.Identify the pair of reactants that upon reaction, with elimination of HCl will give rise to the dipeptide Gly-Ala.

Q14.Given below are the pairs of group 13 elements showing their relation in terms of atomic radius.
$(\mathrm{B}<\mathrm{Al}),(\mathrm{Al}<\mathrm{Ga}),(\mathrm{Ga}<\mathrm{In})$ and $(\mathrm{In}<\mathrm{Tl})$
Identify the elements present in the incorrect pair and in that pair …

Q15.An organic compound (X) with molecular formula ${\mathrm{C}}_3{\mathrm{H}}_6\mathrm{O}$ is not readily oxidised. On reduction it gives ( ${\mathrm{C}}_3{\mathrm{H}}_8\mathrm{O}(\mathrm{Y})$ which reacts with HBr to give a bromide (Z) which is converted to Grignard reagent …

Q16.Predict the major product of the following reaction sequence :-

Q17.Given below are two statements.

Statement I : The dipole moment of $\stackrel{4}{\mathrm{CH}}-\stackrel{3}{\mathrm{CH}}=\stackrel{2}{\mathrm{CH}}-\stackrel{1}{\mathrm{CH}}=\mathrm{O}$ is greater than (see structure)

Statement II: …

Q18.Pair of transition metal ions having the same number of unpaired electrons is :

Q19.Which one of the following about an electron occupying the 1s orbital in a hydrogen atom is incorrect? (Bohr's radius is represented by ${\mathrm{a}}_0$ )

Q20.In Dumas' method for estimation of nitrogen 1g of an organic compound gave 150 mL of nitrogen collected at 300 K temperature and 900 mm Hg pressure. The percentage composition of nitrogen in the compound is ____ % (nearest integer).
(Aqueous tension at …

Q21.KMnO₄ acts as an oxidising agent in acidic medium. 'X' is the difference between the oxidation states of Mn in reactant and product. 'Y' is the number of 'd' electrons present in the brown red precipitate formed at the end of the acetate ion test with neutral ferric chloride. The …

Q22.Fortification of food with iron is done using FeSO₄·7H₂O. The mass in grams of the FeSO₄·7H₂O required to achieve 12 ppm of iron in 150 kg of wheat is ____ (Nearest integer)
[Given: Molar mass of Fe, S and O respectively are 56, 32 and 16 g mol⁻¹]

Q23.The pH of a 0.01 M weak acid HX (Kₐ = 4 × 10⁻¹⁰) is found to be 5. Now the acid solution is diluted with excess of water so that the pH of the solution changes to 6. The new concentration of the diluted weak acid is given as x × 10⁻⁴ M. The value of x is ____ (nearest integer)

Q24.The total number of hydrogen bonds of a DNA-double Helix strand whose one strand has the following sequence of bases is ____.
5' - G - G - C - A - A - A - T - C - G - G - C - T - A - 3'

Q1.Let $f$, $\mathrm{g}:(1,\infty )\to \mathbb{R}$ be defined as $f(\mathrm{x})=\frac{2x+3}{5x+2}$ and $\mathrm{g}(\mathrm{x})=\frac{2-3x}{1-x}$. If the range of the function $f\circ g:[2,4]\to \mathbb{R}$ is $[\alpha ,\beta ]$, then …

Q2.Consider the sets $\mathrm{A}=\left\{(\mathrm{x},\mathrm{y})\in \mathbb{R}\times \mathbb{R}:{\mathrm{x}}^2+{\mathrm{y}}^2=25\right\}$, $\mathrm{B}=\left\{(\mathrm{x},\mathrm{y})\in \mathbb{R}\times \mathbb{R}:{\mathrm{x}}^2+9{\mathrm{y}}^2=144\right\}$, …

Q3.Let $\mathrm{A}=\{1,6,11,16,\dots \}$ and $\mathrm{B}=\{9,16,23,30,\dots \}$ be the sets consisting of the first 2025 terms of two arithmetic progressions. Then $\mathrm{n}(\mathrm{A}\cup \mathrm{B})$ is

Q4.For an integer $\mathrm{n}\ge 2$, if the arithmetic mean of all coefficients in the binomial expansion of $(x+y{)}^{2n-3}$ is 16, then the distance of the point $\mathrm{P}\left(2\mathrm{n}-1,{\mathrm{n}}^2-4\mathrm{n}\right)$ from the line $\mathrm{x}+\mathrm{y}=8$ i …

Q5.The probability, of forming a 12 persons committee from 4 engineers, 2 doctors and 10 professors containing at least 3 engineers and at least 1 doctor, is:

Q6.Let the shortest distance between the lines $\frac{x-3}{3}=\frac{y-\alpha }{-1}=\frac{z-3}{1}$ and $\frac{x+3}{-3}=\frac{y+7}{2}=\frac{z-\beta }{4}$ be $3\sqrt{30}$. Then the positive value of $5\alpha +\beta$ is

Q7.If ${\lim }_{x\to 1^{+}}\frac{(x-1)(6+\lambda \cos (x-1))+\mu \sin (1-x)}{(x-1{)}^3}=-1$, where $\lambda ,\mu \in \mathbb{R}$, then $\lambda +\mu$ is equal to

Q8.Let $f:[0,\infty )\to \mathbb{R}$ be differentiable function such that $f(\mathrm{x})=1-2\mathrm{x}+{\int }_0^x{e}^{x-t}f(t)\mathrm{dt}$ for all $\mathrm{x}\in [0,\infty )$. Then the area of the region bounded by $\mathrm{y}=f(\mathrm{x})$ and the coordinate a …

Q9.Let A and B be two distinct points on the line $\mathrm{L}:\frac{\mathrm{x}-6}{3}=\frac{\mathrm{y}-7}{2}=\frac{\mathrm{z}-7}{-2}$. Both A and B are at a distance $2\sqrt{17}$ from the foot of perpendicular drawn from the point $(1,2,3)$ on the line L. If O is the origin, …

Q10.Let $f:\mathbb{R}\to \mathbb{R}$ be a continuous function satisfying $f(0)=1$ and $f(2\mathrm{x})-f(\mathrm{x})=\mathrm{x}$ for all $\mathrm{x}\in \mathbb{R}$. If ${\lim }_{n\to \infty }\left\{f(x)-f\left(\frac{x}{2^n}\right)\right\}=G(x)$, then …

Q11.$1+3+5^2+7+9^2+\dots$ upto 40 terms is equal to

Q12.In the expansion of ${\left(\sqrt[3]{2}+\frac{1}{\sqrt[3]{3}}\right)}^n,\mathrm{n}\in \mathrm{N}$, if the ratio of $15^{\text{th }}$ term from the beginning to the $15^{\text{th }}$ term from the end is $\frac{1}{6}$, then the value of ${}^n{C}_3$ is:

Q13.Considering the principal values of the inverse trigonometric functions, ${\sin }^{-1}\left(\frac{\sqrt{3}}{2}x+\frac{1}{2}\sqrt{1-x^2}\right),-\frac{1}{2}<x<\frac{1}{\sqrt{2}}$, is equal to

Q14.Consider two vectors $\overrightarrow{\mathrm{u}}=3\hat{\mathrm{i}}-\hat{\mathrm{j}}$ and $\overrightarrow{\mathrm{v}}=2\hat{\mathrm{i}}+\hat{\mathrm{j}}-\lambda \hat{\mathrm{k}},\lambda >0$. The angle between them is given by …

Q15.Let the three sides of a triangle are on the lines $4x-7y+10=0,x+y=5$ and $7x+4y=15$. Then the distance of its orthocentre from the orthocentre of the triangle formed by the lines $\mathrm{x}=0,\mathrm{y}=0$ and $\mathrm{x}+\mathrm{y}=1$ is

Q16.The value of ${\int }_{-1}^1\frac{(1+\sqrt{|x|-x})e^x+(\sqrt{|x|-x})e^{-x}}{e^x+e^{-x}}dx$ is equal to

Q17.The length of the latus-rectum of the ellipse, whose foci are $(2,5)$ and $(2,-3)$ and eccentricity is $\frac{4}{5}$, is

Q18.Consider the equation ${\mathrm{x}}^2+4\mathrm{x}-\mathrm{n}=0$, where $n\in [20,100]$ is a natural number. Then the number of all distinct values of n , for which the given equation has integral roots, is equal to

Q19.A box contains 10 pens of which 3 are defective. A sample of 2 pens is drawn at random and let X denote the number of defective pens. Then the variance of X is

Q20.If $10{\sin }^4\theta +15{\cos }^4\theta =6$, then the value of $\frac{27{\mathrm{cosec}}^6\theta +8{\sec }^6\theta }{16{\sec }^8\theta }$ is:

Q21.If the area of the region $\{(x,y):|x-5|\le y\le 4\sqrt{x}\}$ is A , then 3 A is equal to

Q22.Let $\mathrm{A}=\left[\begin{array}{ccc}\cos \theta & 0& -\sin \theta \\ 0& 1& 0\\ \sin \theta & 0& \cos \theta \end{array}\right]$. If for some $\theta \in (0,\pi )$, $A^2=A^T$, then the sum of the diagonal elements of the matrix …

Q23.Let $\mathrm{A}=\{\mathrm{z}\in \mathrm{C}:|\mathrm{z}-2-\mathrm{i}|=3\}$, $B=\{z\in C:\mathrm{Re}(z-iz)=2\}$ and $S=A\cap B$. Then ${\sum }_{z\in \mathrm{S}}|z{|}^2$ is equal to

Q24.Let $C$ be the circle $x^2+(y-1{)}^2=2$, $E_1$ and $E_2$ be two ellipses whose centres lie at the origin and major axes lie on x-axis and y-axis respectively. Let the straight line $x+y=3$ touch the curves $C$, $E_1$ and $E_2$ at $P(x_1,y_1)$, $Q(x_2,y_2)$ and …

Q25.Let $m$ and $n$ be the number of points at which the function $f(x)=\max \{x,x^3,x^5,\dots ,x^{21}\}$, $x\in \mathbb{R}$, is not differentiable and not continuous, respectively. Then $m+n$ is equal to ______.