JEE Main 2024 · 29 Jan 2024 · Shift 2

Q1.Two sources of light emit with a power of 200 W. The ratio of number of photons of visible light emitted by each source having wavelengths 300 nm and 500 nm respectively, will be :

Q2.The truth table for this given circuit is :

Q3.A physical quantity Q is found to depend on quantities $a,b,c$ by the relation $Q=\frac{a^4{b}^3}{c^2}$. The percentage error in $a,b$ and c are $3\%$, $4\%$ and $5\%$ respectively. Then, the percentage error in Q is :

Q4.In an a.c. circuit, voltage and current are given by : $V=100\sin (100t)$ V and $I=100\sin \left(100t+\frac{\pi }{3}\right)$ mA respectively.
The average power dissipated in one cycle is :

Q5.The temperature of a gas having $2.0\times 10^{25}$ molecules per cubic meter at 1.38 atm (Given, $k=1.38\times 10^{-23}$ JK${}^{-1}$) is :

Q6.A stone of mass 900 g is tied to a string and moved in a vertical circle of radius 1 m making 10 rpm. The tension in the string, when the stone is at the lowest point is (if ${\pi }^2=9.8$ and $g=9.8$ m/s${}^2$)

Q7.The bob of a pendulum was released from a horizontal position. The length of the pendulum is 10 m. If it dissipates $10\%$ of its initial energy against air resistance, the speed with which the bob arrives at the lowest point is: [Use, $g:10$ ms${}^{-2}$]

Q8.If the distance between object and its two times magnified virtual image produced by a curved mirror is 15 cm, the focal length of the mirror must be :

Q9.Two particles X and Y having equal charges are being accelerated through the same potential difference. Thereafter they enter normally in a region of uniform magnetic field and describes circular paths of radii $R_1$ and $R_2$ respectively. The mass ratio of X and Y is :

Q10.In Young's double slit experiment, light from two identical sources are superimposing on a screen. The path difference between the two lights reaching at a point on the screen is $\frac{7\lambda }{4}$. The ratio of intensity of fringe at this point with respect to the maximum i …

Q11.A small liquid drop of radius R is divided into 27 identical liquid drops. If the surface tension is T, then the work done in the process will be :

Q12.A bob of mass 'm' is suspended by a light string of length 'L'. It is imparted a minimum horizontal velocity at the lowest point A such that it just completes half circle reaching the top most position B. The ratio of kinetic energies …

Q13.A wire of length L and radius r is clamped at one end. If its other end is pulled by a force F, its length increases by $l$. If the radius of the wire and the applied force both are reduced to half of their original values keeping original length constant, the increase in lengt …

Q14.A planet takes 200 days to complete one revolution around the Sun. If the distance of the planet from Sun is reduced to one fourth of the original distance, how many days will it take to complete one revolution?

Q15.A plane electromagnetic wave of frequency 35 MHz travels in free space along the X-direction. At a particular point (in space and time) $\overrightarrow{\mathrm{E}}=9.6\hat{\mathrm{j}}\mathrm{V}/\mathrm{m}$. The value of magnetic field at this point is:

Q16.In the given circuit, the current in resistance ${\mathrm{R}}_3$ is:

Q17.A particle is moving in a straight line. The variation of position '$x$' as a function of time '$t$' is given as $x=(t^3-6t^2+20t+15)$ m. The velocity of the body when its acceleration becomes zero is:

Q18.N moles of a polyatomic gas $(\mathrm{f}=6)$ must be mixed with two moles of a monoatomic gas so that the mixture behaves as a diatomic gas. The value of N is:

Q19.Given below are two statements:

Statement I: Most of the mass of the atom and all its positive charge are concentrated in a tiny nucleus and the electrons revolve around it, is Rutherford's model.
Statement II: An atom is a spherical cloud of positive charges with electrons embe …

Q20.An electric field is given by $(6\hat{\mathrm{i}}+5\hat{\mathrm{j}}+3\hat{\mathrm{k}})\mathrm{N}/\mathrm{C}$.

The electric flux through a surface area $30\hat{\mathrm{i}}{\mathrm{m}}^2$ lying in YZ-plane (in SI unit) is:

Q21.Two metallic wires P and Q have same volume and are made up of same material. If their area of cross sections are in the ratio $4:1$ and force ${\mathrm{F}}_1$ is applied to P, an extension of $\Delta l$ is produced. The force which is required to produce same extension in …

Q22.A horizontal straight wire 5 m long extending from east to west falling freely at right angle to horizontal component of earth's magnetic field $0.60\times 10^{-4}{\mathrm{Wbm}}^{-2}$. The instantaneous value of emf induced in the wire when its velocity is …

Q23.Hydrogen atom is bombarded with electrons accelerated through a potential different of V, which causes excitation of hydrogen atoms. If the experiment is being formed at $\mathrm{T}=0\mathrm{K}$. The minimum potential difference needed to observe any Balmer series lines in th …

Q24.A charge of $4.0\mu \mathrm{C}$ is moving with a velocity of $4.0\times 10^6{\mathrm{ms}}^{-1}$ along the positive y-axis under a magnetic field $\overrightarrow{\mathrm{B}}$ of strength $(2\hat{\mathrm{k}})$ T. The force acting on the charge is …

Q25.A simple harmonic oscillator has an amplitude A and time period $6\pi$ second. Assuming the oscillation starts from its mean position, the time required by it to travel from $\mathrm{x}=\mathrm{A}$ to $\mathrm{x}=\frac{\sqrt{3}}{2}\mathrm{A}$ will be $\frac{\pi }{x}s$, …

Q26.In the given figure, the charge stored in $6\mu \mathrm{F}$ capacitor, when points A and B are joined by a connecting wire is ______ $\mu \mathrm{C}$.

Q27.In a single slit diffraction pattern, a light of wavelength $6000\mathring{A}$ is used. The distance between the first and third minima in the diffraction pattern is found to be 3 mm when the screen in placed 50 cm away from slits. The width of the slit is ______ …

Q28.In the given circuit, the current flowing through the resistance $20\Omega$ is 0.3 A , while the ammeter reads 0.9 A . The value of ${\mathrm{R}}_1$ is ______ $\Omega$.

Q29.A particle is moving in a circle of radius 50 cm in such a way that at any instant the normal and tangential components of its acceleration are equal. If its speed at $\mathrm{t}=0$ is $4\mathrm{m}/\mathrm{s}$, the time taken to complete the first revolution will be …

Q30.A body of mass 5 kg moving with a uniform speed $3\sqrt{2}{\mathrm{ms}}^{-1}$ in $\mathrm{X}-\mathrm{Y}$ plane along the line $\mathrm{y}=\mathrm{x}+4$. The angular momentum of the particle about the origin will be ______ $\mathrm{kg}{\mathrm{m}}^2{\mathrm{s}}^{-1}$.

Q1.The ascending acidity order of the following H atoms is

Q2.Which of the following reaction is correct ?

Q3.According to IUPAC system, the compound is named as

Q4.The correct IUPAC name of ${\mathrm{K}}_2{\mathrm{MnO}}_4$ is

Q5.A reagent which gives brilliant red precipitate with Nickel ions in basic medium is

Q6.Phenol treated with chloroform in presence of sodium hydroxide, which further hydrolysed in presence of an acid results

Q7.On passing a gas, ' X ', through Nessler's reagent, a brown precipitate is obtained. The gas ' X ' is

Q8.The product A formed in the following reaction is:

Q9.Identify the reagents used for the following conversion

Q10.Which of the following acts as a strong reducing agent? (Atomic number : $\mathrm{Ce}=58,\mathrm{Eu}=63$, $\mathrm{Gd}=64,\mathrm{Lu}=71$ )

Q11.Chromatographic technique/s based on the principle of differential adsorption is/are
A. Column chromatography
B. Thin layer chromatography
C. Paper chromatography

Choose the most appropriate answer from the options given below:

Q12.Which of the following statements are correct about $\mathrm{Zn},\mathrm{Cd}$ and Hg ?
A. They exhibit high enthalpy of atomization as the d-subshell is full.
B. Zn and Cd do not show variable oxidation state while Hg shows +I and +II .
C. Compounds of $\mathrm{Zn},\mathrm{Cd}$ …

Q13.The element having the highest first ionization enthalpy is

Q14.Alkyl halide is converted into alkyl isocyanide by reaction with

Q15.Which one of the following will show geometrical isomerism?

Q16.Given below are two statements:

Statement I: Fluorine has most negative electron gain enthalpy in its group.
Statement II: Oxygen has least negative electron gain enthalpy in its group.
In the light of the above statements, choose the most appropriate from the options given belo …

Q17.Anomalous behaviour of oxygen is due to its

Q18.The total number of anti bonding molecular orbitals, formed from 2s and 2p atomic orbitals in a diatomic molecule is ____.

Q19.The oxidation number of iron in the compound formed during brown ring test for ${\mathrm{NO}}_3^{-}$ion is ____.

Q20.The following concentrations were observed at 500 K for the formation of ${\mathrm{NH}}_3$ from ${\mathrm{N}}_2$ and ${\mathrm{H}}_2$. At equilibrium : $[{\mathrm{N}}_2]=2\times 10^{-2}\mathrm{M},[{\mathrm{H}}_2]=3\times 10^{-2}\mathrm{M}$ and …

Q21.Molality of $0.8\mathrm{M}{\mathrm{H}}_2{\mathrm{SO}}_4$ solution (density $1.06\mathrm{g}{\mathrm{cm}}^{-3}$ ) is ____ $\times 10^{-3}\mathrm{m}$.

Q22.If 50 mL of 0.5 M oxalic acid is required to neutralise 25 mL of NaOH solution, the amount of NaOH in 50 mL of given NaOH solution is _____ g.

Q23.The total number of 'Sigma' and Pi bonds in 2-formylhex-4-enoic acid is _____.

Q24.The half-life of radioisotopic bromine - 82 is 36 hours. The fraction which remains after one day is _____ $\times 10^{-2}$.
(Given antilog $0.2006=1.587$)

Q25.Standard enthalpy of vapourisation for $\mathrm{CCl}{}_4$ is $30.5{\text{ kJ mol}}^{-1}$. Heat required for vapourisation of $284\text{ g}$ of $\mathrm{CCl}{}_4$ at constant temperature is _____ kJ.
(Given molar mass in ${\text{g mol}}^{-1}$; $\mathrm{C}=12$, $\mathrm{Cl}=35.5$)

Q26.A constant current was passed through a solution of $\mathrm{AuCl}{}_4{}^{-}$ ion between gold electrodes. After a period of 10.0 minutes, the increase in mass of cathode was 1.314 g. The total charge passed through the solution is _____ $\times 10^{-2}\text{ F}$.
(Given atomic mass of …

Q27.The total number of molecules with zero dipole moment among $\mathrm{CH}{}_4$, $\mathrm{BF}{}_3$, $\mathrm{H}{}_2\mathrm{O}$, $\mathrm{HF}$, $\mathrm{NH}{}_3$, $\mathrm{CO}{}_2$ and $\mathrm{SO}{}_2$ is _____.

Q28.Match List I with List II:
List-I (Compound): A. Ethanol B. Phenol C. m-Nitrophenol D. p-Nitrophenol
List-II (pKₐ value): I. 10.0 II. 15.9 III. 7.1 IV. 8.3
Choose the correct answer from the options given below:

Q1.Let $\mathrm{A}=\left[\begin{array}{ccc}2& 1& 2\\ 6& 2& 11\\ 3& 3& 2\end{array}\right]$ and $\mathrm{P}=\left[\begin{array}{ccc}1& 2& 0\\ 5& 0& 2\\ 7& 1& 5\end{array}\right]$. The sum of the prime factors of …

Q2.Number of ways of arranging 8 identical books into 4 identical shelves where any number of shelves may remain empty is equal to

Q3.If the mean and variance of five observations are $\frac{24}{5}$ and $\frac{194}{25}$ respectively and the mean of first four observations is $\frac{7}{2}$, then the variance of the first four observations is equal to

Q4.The function $f(x)=2x+3(x{)}^{\frac{2}{3}},x\in \mathbb{R}$, has

Q5.Let r and $\theta$ respectively be the modulus and amplitude of the complex number $\mathrm{z}=2-\mathrm{i}\left(2\tan \frac{5\pi }{8}\right)$, then $(\mathrm{r},\theta )$ is equal to

Q6.The sum of the solutions $x\in \mathbb{R}$ of the equation $\frac{3\cos 2x+{\cos }^{3}2x}{{\cos }^{6}x-{\sin }^{6}x}=x^3-x^2+6$ is

Q7.Let $\overrightarrow{OA}=\vec{a},\overrightarrow{OB}=12\vec{a}+4\vec{b}$ and $\overrightarrow{OC}=\vec{b}$, where $O$ is the origin. If S is the parallelogram with adjacent sides OA and OC, then $\frac{\text{area of the quadrilateral }\mathrm{OABC}}{\text{area of S}}$ …

Q8.If ${\log }_e\mathrm{a},{\log }_e\mathrm{b},{\log }_e\mathrm{c}$ are in an A.P. and ${\log }_e\mathrm{a}-{\log }_{e}2b,{\log }_{e}2b-{\log }_{e}3c,{\log }_{e}3c-{\log }_{e}a$ are also in an A.P, then $\mathrm{a}:\mathrm{b}:\mathrm{c}$ is equal to

Q9.If
$\int \frac{{\sin }^{\frac{3}{2}}x+{\cos }^{\frac{3}{2}}x}{\sqrt{{\sin }^{3}x{\cos }^{3}x\sin (x-\theta )}}dx=A\sqrt{\cos \theta \tan x-\sin \theta }+B\sqrt{\cos \theta -\sin \theta \cot x}+C$,
where C is the integration constant, then AB is equal to

Q10.The distance of the point $(2,3)$ from the line $2x-3\mathrm{y}+28=0$, measured parallel to the line $\sqrt{3}\mathrm{x}-\mathrm{y}+1=0$, is equal to

Q11.If $\sin \left(\frac{y}{x}\right)={\log }_e|x|+\frac{\alpha }{2}$ is the solution of the differential equation $x\cos \left(\frac{y}{x}\right)\frac{dy}{dx}=y\cos \left(\frac{y}{x}\right)+x$ and $y(1)=\frac{\pi }{3}$, then ${\alpha }^2$ is equal to

Q12.If each term of a geometric progression ${\mathrm{a}}_1,{\mathrm{a}}_2,{\mathrm{a}}_3,\dots$ with ${\mathrm{a}}_1=\frac{1}{8}$ and ${\mathrm{a}}_2\ne {\mathrm{a}}_1$, is the arithmetic mean of the next two terms and …

Q13.Let A be the point of intersection of the lines $3\mathrm{x}+2\mathrm{y}=14,5\mathrm{x}-\mathrm{y}=6$ and B be the point of intersection of the lines $4x+3y=8,6x+y=5$. The distance of the point $\mathrm{P}(5,-2)$ from the line AB is

Q14.Let $\mathrm{x}=\frac{\mathrm{m}}{\mathrm{n}}$ ( m , n are co-prime natural numbers) be a solution of the equation $\cos \left(2{\sin }^{-1}x\right)=\frac{1}{9}$ and let $\alpha ,\beta (\alpha >\beta )$ be the roots of the equation …

Q15.The function $\mathrm{f}(\mathrm{x})=\frac{\mathrm{x}}{{\mathrm{x}}^2-6\mathrm{x}-16},\mathrm{x}\in \mathbb{R}-\{-2,8\}$

Q16.Let $\mathrm{y}={\log }_{\mathrm{e}}\left(\frac{1-{\mathrm{x}}^2}{1+{\mathrm{x}}^2}\right),-1<\mathrm{x}<1$. Then at $\mathrm{x}=\frac{1}{2}$, the value of $225\left(y^{\prime }-y^{\prime \prime }\right)$ is equal to

Q17.If R is the smallest equivalence relation on the set $\{1,2,3,4\}$ such that $\{(1,2),(1,3)\}\subset \mathrm{R}$, then the number of elements in R is

Q18.An integer is chosen at random from the integers 1, $2,3,\dots ,50$. The probability that the chosen integer is a multiple of atleast one of 4,6 and 7 is

Q19.Let a unit vector $\hat{\mathrm{u}}=x\hat{\mathrm{i}}+y\hat{\mathrm{j}}+z\hat{\mathrm{k}}$ make angles $\frac{\pi }{2},\frac{\pi }{3}$ and $\frac{2\pi }{3}$ with the vectors …

Q20.Let $\alpha ,\beta$ be the roots of the equation ${\mathrm{x}}^2-\sqrt{6}\mathrm{x}+3=0$ such that $\mathrm{Im}(\alpha )>\mathrm{Im}(\beta )$. Let $\mathrm{a},\mathrm{b}$ be integers not divisible by 3 and n be a natural number such that …

Q21.Let a, b, c be in A.P. and the line $ax+by+c=0$ passes through a fixed point P. For the system of equations

to have infinite solutions, let the point be Q$(\alpha ,\beta )$. T …

Q22.Let $P(\alpha ,\beta )$ be a point on the parabola $y^2=4x$. If P also lies on the chord of the parabola $x^2=8y$ whose mid point is $\left(1,\frac{5}{4}\right)$. Then $(\alpha -28)(\beta -8)$ is equal to ______.

Q23.If ${\int }_{\frac{\pi }{6}}^{\frac{\pi }{3}}\sqrt{1-\sin 2x}dx=\alpha +\beta \sqrt{2}+\gamma \sqrt{3}$, where $\alpha ,\beta$ and $\gamma$ are rational numbers, then $3\alpha +4\beta -\gamma$ is equal to ______.

Q24.Let the area of the region $\{(x,y):0\le x\le 3,0\le y\le \min \{x^2+2,2x+2\}\}$ be A. Then 12A is equal to ______.

Q25.Let O be the origin, and M and N be the points on the lines $\frac{x-5}{4}=\frac{y-4}{1}=\frac{z-5}{3}$ and $\frac{x+8}{12}=\frac{y+2}{5}=\frac{z+11}{9}$ respectively such that MN is the shortest distance between the given lines. Then …

Q26.Let $f(x)=\sqrt{{\lim }_{r\to x}\left\{\frac{2r^2[(f(r){)}^2-f(x)f(r)]}{r^2-x^2}-r^3{e}^{\frac{f(r)}{r}}\right\}}$ be differentiable in $(-\infty ,0)\cup (0,\infty )$ and $f(1)=1$. Then the value of $ea$, such that $f(a)=0$, is equal to ______.

Q27.Remainder when $64^{32^{32}}$ is divided by 9 is equal to ______.

Q28.Let the set $C=\left\{(x,y)\mid x^2-2^y=2023,x,y\in \mathbb{N}\right\}$.

Then ${\sum }_{(x,y)\in C}(x+y)$ is equal to ______.

Q29.Let the slope of the line $45x+5y+3=0$ be $27r_1+\frac{9r_2}{2}$ for some $r_1,r_2\in \mathbb{R}$. Then ${\lim }_{x\to 3}\left({\int }_3^x\frac{8t^2}{\frac{3r_{2}x}{2}-r_2{x}^2-r_1{x}^3-3x}dt\right)$ is equal to ______.