JEE Main 2025 — 7 April, Morning Shift

Reaction $\mathrm{A}(\mathrm{g}) \rightarrow 2 \mathrm{~B}(\mathrm{~g})+\mathrm{C}(\mathrm{g})$ is a first order reaction. It was started with pure $A$

Which of the following option is incorrect?

When a salt is treated with sodium hydroxide solution it gives gas $X$. On passing gas $X$ through reagent Y a brown coloured precipitate is formed. X and Y respectively, are

Which of the following amine(s) show(s) positive carbylamine test?

Choose the correct answer from the options given below.

Given below are two statements : one is labelled as Statement I and the other is labelled as Statement II:

Statement I: D-(+)-glucose + D-(+) fructose $\xrightarrow{-\mathrm{H}_{2} \mathrm{O}}$ Sucrose $\xrightarrow{\text { hydrolysis }} \mathrm{D}-(+)$ glucose $+\mathrm{D}-(+)$ fructose

Statement II: Invert sugar is formed during sucrose hydrolysis.

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

The reactions which cannot be applied to prepare an alkene by elimination, are

Choose the correct answer from the options given below :

The number of valence electrons present in the metal among $\mathrm{Cr}, \mathrm{Co}, \mathrm{Fe}$ and Ni which has the lowest enthalpy of atomisation is

Given below are two statements : one is labelled as Statement I and the other is labelled as Statement II:

Statement I: Mohr's salt is composed of only three types of ions-ferrous, ammonium and sulfate.

Statement II: If the molar conductance at infinite dilution for ferrous, ammonium and sulfate ions are $\mathrm{x}_{1}, \mathrm{x}_{2}$ and $\mathrm{x}_{3} \mathrm{Scm}^{2} \mathrm{~mol}^{-1}$, respectively then the molar conductance for Mohr's salt solution at infinite dilution would be given by $x_{1}+x_{2}+2 x_{3}$

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

At the sea level, the dry air mass percentage composition is given as nitrogen gas: 70.0, oxygen gas: 27.0 and argon gas: 3.0. If total pressure is 1.15 atm , then calculate the ratio of following respectively:

(i) partial pressure of nitrogen gas to partial pressure of oxygen gas

(ii) partial pressure of oxygen gas to partial pressure of argon gas

(Given: Molar mass of N, O and Ar are 14, 16 and $40 \mathrm{~g} \mathrm{~mol}^{-1}$ respectively.)

The group 14 elements $A$ and $B$ have the first ionisation enthalpy values of 708 and $715 \mathrm{~kJ} \mathrm{~mol}^{-1}$ respectively. The above values are lowest among their group members. The nature of their ions $A^{2+}$ and $\mathrm{B}^{4+}$ respectively is

The first transition series metal ' M ' has the highest enthalpy of atomisation in its series. One of its aquated ion $\left(\mathrm{M}^{\mathrm{n}+}\right)$ exists in green colour. The nature of the oxide formed by the above $\mathrm{M}^{\mathrm{n+}}$ ion is :

Total enthalpy change for freezing of 1 mol of water at $10^{\circ} \mathrm{C}$ to ice at $-10^{\circ} \mathrm{C}$ is $\_\_\_\_\_$

(Given : $\Delta_{\text {fus }} \mathrm{H}=x \mathrm{~kJ} / \mathrm{mol}$ $\mathrm{C}_{\mathrm{p}}\left(\mathrm{H}_{2} \mathrm{O}(\ell)\right]=\mathrm{y} \mathrm{J} \mathrm{mol}{ }^{-1} \mathrm{~K}^{-1}$ $\mathrm{C}_{\mathrm{p}}\left(\mathrm{H}_{2} \mathrm{O}(\mathrm{s})\right]=\mathrm{zJ} \mathrm{mol}^{-1} \mathrm{~K}^{-1}$

Given below are two statements : one is labelled as Statement I and the other is labelled as Statement II:

Statement I: Ozonolysis followed by treatment with $\mathrm{Zn}, \mathrm{H}_{2} \mathrm{O}$ of cis-2 butene gives ethanal.

Statement II: The product obtained by ozonolysis followed by treatment with $\mathrm{Zn}, \mathrm{H}_{2} \mathrm{O}$ of 3, 6-dimethyloct-4-ene has no chiral carbon atom.

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

Which of the following is the correct IUPAC name of given organic compound (X)?

Given below are two statements : one is labelled as Statement I and the other is labelled as Statement II:

Statement I: Dimethyl ether is completely soluble in water. However, diethyl ether is soluble in water to a very small extent.

Statement II: Sodium metal can be used to dry diethyl ether and not ethyl alcohol.

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

Which of the following statements are correct, if the threshold frequency of caesium is $5.16 \times 10^{14} \mathrm{~Hz}$ ?

A. When Cs is placed inside a vacuum chamber with an ammeter connected to it and yellow light is focused on Cs, the ammeter shows the presence of current.

B. When the brightness of the yellow light is dimmed, the value of the current in the ammeter is reduced.

C. When a red light is used instead of the yellow light, the current produced is higher with respect to the yellow light.

D. When a blue light is used, the ammeter shows the formation of current.

E. When a white light is used. the ammeter shows formation of current.

Choose the correct answer from the options given below:

An aqueous solution of HCl with pH 1.0 is diluted by adding equal volume of water (ignoring dissociation of water). The pH of HCl solution would (Given log $2=0.30$ )

The number of paramagnetic complex among $\left[\mathrm{FeF} 6_{6}\right]^{3-},\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-},\left[\mathrm{Mn}(\mathrm{CN})_{6}\right]^{3-},$

$\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$, $\left[\mathrm{MnCl}_{6}\right]^{3-}$ and $\left[\mathrm{CoF}_{6}\right]^{3-}$, which involved $d^{2} s p^{3}$ hybridization is $\_\_\_\_\_$

The percentage dissociation of a salt $\left(\mathrm{MX}_{3}\right)$ solution at given temperature (van't Hoff factor $i=2$ ) is $\_\_\_\_\_$ % (Nearest integer)

1 Faraday electricity was passed through $\mathrm{Cu}^{2+}$ (1.5 $\mathrm{M}, 1 \mathrm{~L}) / \mathrm{Cu}$ and 0.1 Faraday was passed through $\mathrm{Ag}^{+}(0.2 \mathrm{M}, 1 \mathrm{~L}) / \mathrm{Ag}$ electrolytic cells. After this the two cells were connected as shown below to make an electrochemical cell. The emf of the cell thus formed at 298 K is $\_\_\_\_\_$ mV (nearest integer)

Given: $\mathrm{E}_{\mathrm{Cu}^{2+} / \mathrm{Cu}}^{\circ}=0.34 \mathrm{~V}$

$\frac{2.303 R T}{F}=0.06 \mathrm{~V}$

An organic compound weighing 500 mg , produced 220 mg of $\mathrm{CO}_{2}$, on complete combustion. The percentage composition of carbon in the compound is $\_\_\_\_\_$ %. (nearest integer) (Given molar mass in $\mathrm{g} \mathrm{mol}^{-1}$ of $\mathrm{C}: 12, \mathrm{O}: 16$ )

Thyroxine, the hormone has given below structure

The percentage of iodine in thyroxine is $\_\_\_\_\_$ %. (nearest integer)

(Given molar mass in $\mathrm{g} \mathrm{mol}^{-1} \mathrm{C}: 12, \mathrm{H}: 1, \mathrm{O}: 16$, N : 14, I : 127)

The mean and standard deviation of $100$ observations are $40$ and $5.1,$ respectively. By mistake one observation is taken as $50$ instead of $40.$ If the correct mean and the correct standard deviation are $\mu$ and $\sigma$ respectively, then $10(\mu+\sigma)$ is equal to

Let the set of all values $p \in \mathbb{R}$, for which both the roots of the equation $x^{2}-(p+2) x+(2 p+9)=0$

are negative real numbers, be the interval $(\alpha, \beta]$. Then $\beta-2 \alpha$ is equal to

If the area of the region bounded by the curves $y=4-\frac{x^{2}}{4}$ and $y=\frac{x-4}{2}$ is equal to $\alpha$, then $6 \alpha$ equals

Let $x=-1$ and $x=2$ be the critical points of the function $f(x)=x^{3}+a x^{2}+b \log _{e}|x|+1, x \neq 0$. Let $m$ and $M$ respectively be the absolute minimum and the absolute maximum values of $f$ in the interval $\left[-2,-\frac{1}{2}\right]$. Then $|M+m|$ is equal to (Take $\log 2=$ $0.7)$ :

Let $y=y(x)$ be the solution curve of the differential equation $x\left(x^{2}+e^{x}\right) d y+\left(e^{x}(x-2) y-x^{3}\right) d x=0$, $x>0$, passing through the point $(1,0)$. Then $y(2)$ is equal to

Let $A$ be a $3 \times 3$ matrix such that $|\operatorname{adj}(\operatorname{adj}(\operatorname{adj} A))|=$ 81. If

$S=\left\{n \in \mathbb{Z}:(|\operatorname{adj}(\operatorname{adj} A)|)^{\frac{(n-1)^{2}}{2}}=|A|^{\left(3 n^{2}-5 n-4\right)}\right\}$, then $\sum_{n \in S}\left|A^{\left(n^{2}+n\right)}\right|$ is

equal to

Let $A B C$ be the triangle such that the equations of lines $A B$ and $A C$ be $3 y-x=2$ and $x+y=2$, respectively, and the points $B$ and $C$ lie on $x$-axis. If $P$ is the orthocentre of the triangle $A B C$, then the area of the triangle $P B C$ is equal to

Let $C_{1}$ be the circle in the third quadrant of radius 3 , that touches both coordinate axes. Let $C_{2}$ be the circle

with centre $(1,3)$ that touches $C_{1}$ externally at the point $(\alpha, \beta)$. If $(\beta-\alpha)^{2}=\frac{m}{n}, \operatorname{gcd}(m, n)=1$,

then $m+n$ is equal to

Let the angle $\theta, 0<\theta<\frac{\pi}{2}$ between two unit vectors $\hat{a}$ and $\hat{b}$ be $\sin ^{-1}\left(\frac{\sqrt{65}}{9}\right)$. If the vector $\vec{c}=3 \hat{a}+6 \hat{b}+9(\hat{a} \times \hat{b}), \quad$ then the value of $9(\vec{c} . \hat{a})-3(\vec{c} . \hat{b})$ is

The integral $\int_{0}^{\pi} \frac{(x+3) \sin x}{1+3 \cos ^{2} x} d x$ is equal to

From a group of 7 batsmen and 6 bowlers, 10 players are to be chosen for a team, which should include atleast 4 batsmen and atleast 4 bowlers. One batsmen and one bowler who are captain and vice-captain respectively of the team should be included. Then the total number of ways such a selection can be made, is

Let $P$ be the parabola, whose focus is $(-2,1)$ and directrix is $2 x+y+2=0$. Then the sum of the ordinates of the points on $P$, whose abscissa is -2 , is

Given below are two statements : one is labelled as Statement I and the other is labelled as Statement II:

Statement I: The set $\left\{z \in \mathbb{C}-\{-i\}:|z|=1\right.$ and $\frac{z-i}{z+i}$ is purely real $\}$ contains exactly two elements.

Statement II: The set $\left\{z \in \mathbb{C}-\{-1\}:|z|=1\right.$ and $\frac{z-1}{z+1}$ is purely imaginary $\}$ contains infinitely many elements.

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

Let $x_{1}, x_{2}, x_{3}, x_{4}$ be in a geometric progression. If 2 , $7,9,5$ are subtracted respectively from $x_{1}, x_{2}, x_{3}, x_{4}$, then the resulting numbers are in an arithmetic progression. Then the value of $\frac{1}{24}\left(x_{1} x_{2} x_{3} x_{4}\right)$ is:

If the shortest distance between the lines $\frac{x-1}{2}=\frac{y-2}{3}=\frac{z-3}{4}$ and $\frac{x}{1}=\frac{y}{\alpha}=\frac{z-5}{1}$ is $\frac{5}{\sqrt{6}}$, then the sum of all possible values of $\alpha$ is

$\lim _{x \rightarrow 0^{+}} \frac{\tan \left(5(x)^{\frac{1}{3}}\right) \log _{e}\left(1+3 x^{2}\right)}{\left(\tan ^{-1} 3 \sqrt{x}\right)^{2}\left(e^{5(x)^{\frac{4}{3}}}-1\right)}$ is equal to

Let the line $L$ pass through $(1,1,1)$ and intersect the lines $\quad \frac{x-1}{2}=\frac{y+1}{3}=\frac{z-1}{4} \quad$ and

$\frac{x-3}{1}=\frac{y-4}{2}=\frac{z}{1}$. Then, which of the following points lies on the line $L$ ?

The remainder when $\left((64)^{(64)}\right)^{(64)}$ is divided by 7 is equal to

Let the system of equations: $2 x+3 y+5 z=9$, $7 x+3 y-2 z=8$, $12 x+3 y-(4+\lambda) z=16-\mu$.

have infinitely many solutions. Then the radius of the circle centred at $(\lambda, \mu)$ and touching the line $4 x=3 y$ is

If for $\theta \in\left[-\frac{\pi}{3}, 0\right]$, the points $(x, y)=$ $\left(3 \tan \left(\theta+\frac{\pi}{3}\right), 2 \tan \left(\theta+\frac{\pi}{6}\right)\right)$ lie on $x y+a x+\beta y+\gamma$ $=0$, then $\alpha^{2}+\beta^{2}+\gamma^{2}$ is equal to

The number of singular matrices of order 2, whose elements are from the set $\{2,3,6,9\}$, is $\_\_\_\_$ .

For $n \geq 2$, let $S_{n}$ denote the set of all subsets of $\{1,2, \ldots, n\}$ with no two consecutive numbers. For example $\{1,3,5\} \in S_{6}$ but $\{1,2,4\} \notin S_{6}$. Then $n\left(S_{5}\right)$ is equal to $\_\_\_\_$ -.

Consider the hyperbola $\frac{x^{2}}{a^{2}}-\frac{y^{2}}{b^{2}}=1$ having one of its focus at $P(-3,0)$. If the latus rectum through its

other focus subtends a right angle at $P$ and $a^{2} b^{2}=\alpha \sqrt{2}-\beta, \alpha, \beta \in \mathbb{N}$, then $\alpha+\beta$ is $\_\_\_\_$ .

The number of relations on the set $A=\{1,2,3\}$, containing at most 6 elements including (1, 2), which are reflexive and transitive but not symmetric, is $\_\_\_\_$ .

The number of points of discontinuity of the function $f(x)=\left[\frac{x^{2}}{2}\right]-[\sqrt{x}], x \in[0,4]$, where [•] denotes

the greatest integer function is $\_\_\_\_$ .

For a hydrogen atom, the ratio of the largest wavelength of Lyman series to that of the Balmer series is

An object of mass 1000 g experiences a time dependent force $\vec{F}=\left(2 t \hat{i}+3 t^{2} \hat{j}\right) \mathrm{N}$. The power generated by the force at time $t$ is:

Two wires $A$ and $B$ are made of same material having ratio of lengths $\frac{L_{A}}{L_{B}}=\frac{1}{3}$ and their diameters ratio $\frac{d_{A}}{d_{B}}=2$. If both the wires are stretched using same force, what would be the ratio of their respective elongations?

Two plane polarized light waves combine at a certain point whose electric field components are

$E_{1}=E_{0} \operatorname{Sin} \omega t$ $E_{2}=E_{0} \operatorname{Sin}\left(\omega t+\frac{\pi}{3}\right)$ Find the amplitude of the resultant wave.

An ac current is represented as $i=5 \sqrt{2}+10 \cos \left(650 \pi t+\frac{\pi}{6}\right) \mathrm{Amp}$

The r.m.s value of the current is

A cubic block of mass $m$ is sliding down on an inclined plane at $60^{\circ}$ with an acceleration of

$\frac{g}{2}$, the value of coefficient of kinetic friction is

Two thin convex lenses of focal lengths 30 cm and 10 cm are placed coaxially, 10 cm apart.

The power of this combination is:

A rod of length 5 L is bent right angle keeping one side length as 2 L . The position of the centre of

mass of the system: (Consider $L=10 \mathrm{~cm}$ )

In a hydrogen like ion, the energy difference between the $2^{\text {nd }}$ excitation energy state and

ground is 108.8 eV . The atomic number of the ion is:

If $\in_{o}$ denotes the permittivity of free space and $\phi E$ is the flux of the electric field through the

area bounded by the closed surface, then dimensions of $\left(\epsilon_{0} \frac{d \phi_{E}}{d t}\right)$

are that of:

Uniform magnetic fields of different strengths ( $B_{1}$ and $B_{2}$ ), both normal to the plane of the paper exist as shown in the figure. A charged particle of mass $m$ and charge $q$, at the interface at an instant, moves into the region 2 with velocity $v$ and returns to the interface. It continues to move into region 1 and finally reaches the interface. What is the displacement of the particle during this movement along the interface?

In the following circuit, the reading of the ammeter will be (Take Zener breakdown voltage = 4 V )

Two projectiles are fired from ground with same initial speeds from same point at angles $\left(45^{\circ}+\alpha\right)$ and $\left(45^{\circ}-\alpha\right)$ with horizontal direction. The ratio of their times of flights is

A lens having refractive index 1.6 has focal length of 12 cm , when it is in air. Find the focal length of the lens when it is placed in water. (Take refractive index of water as 1.28 )

Two charges $q_{1}$ and $q_{2}$ are separated by a distance of 30 cm . A third charge $q_{3}$ initially at ' $C$ ' as shown in the figure, is moved along the circular path of radius 40 cm from C to D. If the difference in potential energy due to movement of $q_{3}$ from $C$ to $D$ is given by $\frac{q_{3} K}{4 \pi \varepsilon_{0}}$ the value of $K$ is

Two harmonic waves moving in the same direction superimpose to form a wave $x=\mathrm{a} \cos (1.5 \mathrm{t}) \cos$ (50.5t) where $t$ is in seconds. Find the period with which they beat. (close to nearest integer)

Match the LIST-I with LIST-II Choose the correct answer from the options given below:

The percentage increase in magnetic field (B) when space within a current carrying solenoid is filled with magnesium (magnetic susceptibility $\chi \mathrm{Mg}=1.2 \times 10^{-5}$ ) is

A wire of resistance $R$ is bent into a triangular pyramid as shown in figure with each segment having same length. The resistance between points $A$ and $B$ is $R / n$. The value of $n$ is

An ideal gas has undergone through the cyclic process as shown in the figure. Work done by the gas in the entire cycle is $\qquad$ $\times 10^{-1} \mathrm{~J}$. (Take $\pi=3.14$ )

A container contains a liquid with refractive index of 1.2 up to a height of 60 cm and another liquid having refractive index 1.6 is added to height H above first liquid. If viewed from above, the apparent shift in the position of bottom of container is 40 cm . The value of $H$ is cm (Consider liquids are immiscible).

A, B and C are disc, solid sphere and spherical shell respectively with same radii and masses. These masses are placed as shown in figure. The moment of inertia of the given system about PQ axis is $\frac{x}{15} I$, where $I$ is the moment of inertia of the disc about its diameter. The value of $x$ is $\qquad$ .

For ac circuit shown in figure, $R=100 \mathrm{k} \Omega$ and $C=100$ pF and the phase difference between

$\mathrm{V}_{\text {in }}$ and $\left(\mathrm{V}_{\mathrm{B}}-\mathrm{V}_{\mathrm{A}}\right)$ is $90^{\circ}$.

The input signal frequency is $10^{\times} \mathrm{rad} / \mathrm{sec}$, where ' $x$ ' is $\qquad$

A wire of length 10 cm and diameter 0.5 mm is used in a bulb. The temperature of the wire is

$1727^{\circ} \mathrm{C}$ and power radiated by the wire is 94.2 W . Its emissivity is $\frac{x}{8}$

where $x=$ $\qquad$ -.

(Given $\sigma=6.0 \times 10^{-8} \mathrm{Wm}^{-2} \mathrm{~K}^{-4}, \pi=3.14$

and assume that the emissivity of wire material is same at all wavelength.)