JEE Main 2022 · 28 Jul 2022 · Shift 1

Q1.The dimensions of $\left(\frac{{\mathrm{B}}^2}{{\mu }_0}\right)$ will be :
(if ${\mu }_0$ : permeability of free space and
B : magnetic field)

Q2.A NCC parade is going at a uniform speed of $9\mathrm{km}/\mathrm{h}$ under a mango tree on which a monkey is sitting at a height of 19.6 m. At any particular instant, the monkey drops a mango. A cadet will receive the mango whose distance from the tree at time of drop is : …

Q3.In two different experiments, an object of mass 5 kg moving with a speed of $25{\mathrm{ms}}^{-1}$ hits two different walls and comes to rest within
(i) 3 second, (ii) 5 seconds, respectively.

Choose the correct option out of the following :

Q4.A balloon has mass of 10 g in air. The air escapes from the balloon at a uniform rate with velocity $4.5\mathrm{cm}/\mathrm{s}$. If the balloon shrinks in 5 s completely. Then, the average force acting on that balloon will be (in dyne).

Q5.If the radius of earth shrinks by $2\%$ while its mass remains same. The acceleration due to gravity on the earth's surface will approximately :

Q6.The force required to stretch a wire of cross-section $1{\mathrm{cm}}^2$ to double its length will be :
(Given Young's modulus of the wire $=2\times 10^{11}\mathrm{N}/{\mathrm{m}}^2$)

Q7.A Carnot engine has efficiency of $50\%$. If the temperature of sink is reduced by $40^{\circ }\mathrm{C}$, its efficiency increases by $30\%$. The temperature of the source will be :

Q8.Given below are two statements :

Statement I : The average momentum of a molecule in a sample of an ideal gas depends on temperature.

Statement II : The rms speed of oxygen molecules in a gas is v. If the temperature is doubled and the oxygen molecules dissociate into oxygen at …

Q9.In the wave equation

the velocity of the wave will be :

Q10.Two capacitors, each having capacitance $40\mu \mathrm{F}$ are connected in series. The space between one of the capacitors is filled with dielectric material of dielectric constant K such that the equivalence capacitance of the system became $24\mu \mathrm{F}$. The value …

Q11.A wire of resistance ${\mathrm{R}}_1$ is drawn out so that its length is increased by twice of its original length. The ratio of new resistance to original resistance is:

Q12.The current sensitivity of a galvanometer can be increased by :
(A) decreasing the number of turns
(B) increasing the magnetic field
(C) decreasing the area of the coil
(D) decreasing the torsional constant of the spring

Choose the most appropriate answer from the options given …

Q13.As shown in the figure, a metallic rod of linear density $0.45\mathrm{kg}{\mathrm{m}}^{-1}$ is lying horizontally on a smooth incline plane which makes an angle of $45^{\circ }$ with the horizontal. The minimum current flowing in the rod required to keep it stationary, when …

Q14.The equation of current in a purely inductive circuit is $5\sin \left(49\pi \mathrm{t}-30^{\circ }\right)$. If the inductance is 30 mH then the equation for the voltage across the inductor, will be :

Let $\pi =\frac{22}{7}$

Q15.As shown in the figure, after passing through the medium 1. The speed of light $v_2$ in medium 2 will be :
$($ Given c $=3\times 10^8{\mathrm{ms}}^{-1})$

Q16.In normal adjustment, for a refracting telescope, the distance between objective and eye piece is 30 cm . The focal length of the objective, when the angular magnification of the telescope is 2 , will be:

Q17.The equation $\lambda =\frac{1.227}{\mathrm{x}}\mathrm{nm}$ can be used to find the de-Brogli wavelength of an electron. In this equation x stands for :

Where,
$\mathrm{m}=$ mass of electron
$\mathrm{P}=$ momentum of electron
K=Kinetic energy of electron
$\mathrm{V}=$ Ac …

Q18.The half life period of a radioactive substance is 60 days. The time taken for $\frac{7}{8}$ th of its original mass to disintegrate will be :

Q19.Identify the solar cell characteristics from the following options :

Q20.In the case of amplitude modulation to avoid distortion the modulation index ( $\mu$ ) should be :

Q21.If the projection of $2\hat{i}+4\hat{j}-2\hat{k}$ on $\hat{i}+2\hat{j}+\alpha \hat{k}$ is zero. Then, the value of $\alpha$ will be

Q22.A freshly prepared radioactive source of half life 2 hours 30 minutes emits radiation which is 64 times the permissible safe level. The minimum time, after which it would be possible to work safely with source, will be ____ hours.

Q23.In a Young's double slit experiment, a laser light of 560 nm produces an interference pattern with consecutive bright fringes' separation of 7.2 mm . Now another light is used to produce an interference pattern with consecutive bright fringes' separation of 8.1 mm . The wavelengt …

Q24.The frequencies at which the current amplitude in an LCR series circuit becomes $\frac{1}{\sqrt{2}}$ times its maximum value, are $212\mathrm{rad}{\mathrm{s}}^{-1}$ and $232\mathrm{rad}{\mathrm{s}}^{-1}$. The value of resistance in the circuit is $\mathrm{R}=5\Omega$. Th …

Q25.As shown in the figure, a potentiometer wire of resistance $20\Omega$ and length 300 cm is connected with resistance box (R.B.) and a standard cell of emf 4 V. For a resistance '$R$' of resistance box introduced into the circuit, the null point for a cell of 20 mV is found to be …

Q26.Two electric dipoles of dipole moments $1.2\times 10^{-30}$ C m and $2.4\times 10^{-30}$ C m are placed in two different uniform electric fields of strengths $5\times 10^4$ NC${}^{-1}$ and $15\times 10^4$ NC${}^{-1}$ respectively. The ratio of maximum torque experienced by th …

Q27.The frequency of echo will be _____ Hz if the train blowing a whistle of frequency 320 Hz is moving with a velocity of $36$ km/h towards a hill from which an echo is heard by the train driver. Velocity of sound in air is $330$ m/s.

Q28.The diameter of an air bubble which was initially 2 mm, rises steadily through a solution of density $1750$ kg m${}^{-3}$ at the rate of $0.35$ cms${}^{-1}$. The coefficient of viscosity of the solution is _____ poise (in nearest integer). (the density of air is negligible).

Q29.A block of mass '$m$' (as shown in figure) moving with kinetic energy $E$ compresses a spring through a distance 25 cm when, its speed is halved. The value of spring constant of used spring will be $nE$ Nm${}^{-1}$ for $n$ = _____.

Q30.Four identical discs each of mass '$M$' and diameter '$a$' are arranged in a small plane as shown in figure. If the moment of inertia of the system about OO${}^{\prime }$ is $\frac{x}{4}M{a}^2$. Then, the value of $x$ will be _____.

Q1.Identify the incorrect statement from the following.
(A) A circular path around the nucleus in which an electron moves is proposed as Bohr's orbit.
(B) An orbital is the one electron wave function ($\Psi$) in an atom.
(C) The existence of Bohr's orbits is supported by hydrogen …

Q2.Which of the following relation is not correct?

Q3.In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical?
(A) Rb and Cs
(B) Na and K
(C) Ar and Kr
(D) I and At

Choose the correct answer from the options given below:

Q4.Which of the reaction is suitable for concentrating ore by leaching process?

Q5.The metal salts formed during softening of hardwater using Clark's method are :

Q6.Which of the following statement is incorrect ?

Q7.Match List-I with List-II, match the gas evolved during each reaction.

Q8.Which of the following has least tendency to liberate ${\mathrm{H}}_2$ from mineral acids?

Q9.Given below are two statements :

Statement I: In polluted water values of both dissolved oxygen and BOD are very low.
Statement II : Eutrophication results in decrease in the amount of dissolved oxygen.
In the light of the above statements, choose the most appropriate answer fro …

Q10.Choose the correct option for the following reactions.

Q11.Among the following marked proton of which compound shows lowest ${\mathrm{pK}}_{\mathrm{a}}$ value?

Q12.Identify the major product A and B for the below given reaction sequence.

Q13.Identify the correct statement for the below given transformation.

Q14.Terylene polymer is obtained by condensation of:

Q15.For the below given cyclic hemiacetal (X), the correct pyranose structure is:

Q16.Statements about Enzyme Inhibitor Drugs are given below:
(A) There are Competitive and Non-competitive inhibitor drugs.
(B) These can bind at the active sites and allosteric sites.
(C) Competitive Drugs are allosteric site blocking drugs.
(D) Non-competitive Drugs are active site …

Q17.For kinetic study of the reaction of iodide ion with ${\mathrm{H}}_2{\mathrm{O}}_2$ at room temperature:
(A) Always use freshly prepared starch solution.
(B) Always keep the concentration of sodium thiosulphate solution less than that of KI solution.
(C) Record the time immediat …

Q18.In the given reaction,
$\mathrm{X}+\mathrm{Y}+3\mathrm{Z}\rightleftarrows {\mathrm{XYZ}}_3$
if one mole of each of X and Y with 0.05 mol of Z gives compound ${\mathrm{XYZ}}_3$. (Given: Atomic masses of $\mathrm{X},\mathrm{Y}$ and Z are 10, 20 and 30 amu, respectively).
The yie …

Q19.An element M crystallises in a body centred cubic unit cell with a cell edge of 300 pm. The density of the element is $6.0\mathrm{g}{\mathrm{cm}}^{-3}$. The number of atoms present in 180 g of the element is ______ $\times 10^{23}$.
(Nearest integer)

Q20.The number of paramagnetic species among the following is ______.
${\mathrm{B}}_2,{\mathrm{Li}}_2,{\mathrm{C}}_2,{\mathrm{C}}_2^{-},{\mathrm{O}}_2^{2-},{\mathrm{O}}_2^{+}$ and ${\mathrm{He}}_2^{+}$

Q21.150 g of acetic acid was contaminated with 10.2 g ascorbic acid $\left({\mathrm{C}}_6{\mathrm{H}}_8{\mathrm{O}}_6\right)$ to lower down its freezing point by ${\left(\mathrm{x}\times 10^{-1}\right)}^{\circ }\mathrm{C}$. The value of x is ______.
(Nearest integer)
[Given …

Q22.$K_a$ for butyric acid $(C_3{H}_{7}COOH)$ is $2\times 10^{-5}$. The pH of 0.2 M solution of butyric acid is $\_\_\_\_$ $\times 10^{-1}$.
(Nearest integer) [Given $\log 2=0.30$]

Q23.For the given first order reaction
$A\to B$
the half life of the reaction is 0.3010 min. The ratio of the initial concentration of reactant to the concentration of reactant at time 2.0 min will be equal to $\_\_\_\_$. (Nearest integer)

Q24.The number of interhalogens from the following having square pyramidal structure is:
${\text{ClF}}_3$, ${\text{IF}}_7$, ${\text{BrF}}_5$, ${\text{BrF}}_3$, ${\text{I}}_2{\text{Cl}}_6$, ${\text{IF}}_5$, $\text{ClF}$, ${\text{ClF}}_5$

Q25.The disproportionation of ${\text{MnO}}_4^{2-}$ in acidic medium resulted in the formation of two manganese compounds A and B. If the oxidation state of Mn in B is smaller than that of A, then the spin-only magnetic moment ($\mu$) value of B in BM is $\_\_\_\_$. (Nearest integer)

Q26.Total number of relatively more stable isomer(s) possible for octahedral complex $[\text{Cu}(\text{en}{)}_2(\text{SCN}{)}_2]$ will be $\_\_\_\_$.

Q27.On complete combustion of 0.492 g of an organic compound containing C, H and O, 0.7938 g of ${\text{CO}}_2$ and 0.4428 g of ${\text{H}}_2\text{O}$ was produced. The % composition of oxygen in the compound is $\_\_\_\_$.

Q1.Let the solution curve of the differential equation $xdy=\left(\sqrt{x^2+y^2}+y\right)dx,x>0$, intersect the line $\mathrm{x}=1$ at $\mathrm{y}=0$ and the line $\mathrm{x}=2$ at $\mathrm{y}=\alpha$. Then the value of $\alpha$ is :

Q2.Considering only the principal values of the inverse trigonometric functions, the domain of the function $f(x)={\cos }^{-1}\left(\frac{x^2-4x+2}{x^2+3}\right)$ is :

Q3.Let the vectors $\vec{a}=(1+t)\hat{i}+(1-t)\hat{j}+\hat{k}$, $\overrightarrow{\mathrm{b}}=(1-\mathrm{t})\hat{\mathrm{i}}+(1+\mathrm{t})\hat{\mathrm{j}}+2\hat{\mathrm{k}}$ and …

Q4.Considering the principal values of the inverse trigonometric functions, the sum of all the solutions of the equation ${\cos }^{-1}(x)-2{\sin }^{-1}(x)={\cos }^{-1}(2x)$ is equal to :

Q5.Let the operations *, ⊙ $\in \{\wedge ,\vee \}$. If $(\mathrm{p}\ast \mathrm{q})\odot (\mathrm{p}\odot \sim \mathrm{q})$ is a tautology, then the ordered pair ( $\ast ,\odot$ ) is :

Q6.Let a vector $\vec{a}$ has a magnitude 9. Let a vector $\vec{b}$ be such that for every $(x,y)\in R\times R-\{(0,0)\}$, the vector ( $x\vec{a}+y\vec{b}$ ) is perpendicular to the vector ( $6y\vec{a}-18x\vec{b}$ ). Then the value of $|\vec{a}\times \vec{b}|$ …

Q7.For $\mathrm{t}\in (0,2\pi )$, if ABC is an equilateral triangle with vertices $\mathrm{A}(\sin t,-\cos t),\mathrm{B}(\cos t,\sin t)$ and $\mathrm{C}(\mathrm{a},\mathrm{b})$ such that its orthocentre lies on a circle with centre $\left(1,\frac{1}{3}\right)$, then …

Q8.For $\alpha \in \mathrm{N}$, consider a relation R on N given by $\mathrm{R}=\{(\mathrm{x},\mathrm{y}):3\mathrm{x}+\alpha \mathrm{y}$ is a multiple of 7}. The relation R is an equivalence relation if and only if :

Q9.Out of $60\%$ female and $40\%$ male candidates appearing in an exam, $60\%$ candidates qualify it. The number of females qualifying the exam is three times the number of males qualifying it. A candidate is randomly chosen from the qualified candidates. The probability, …

Q10.If $y=y(x),x\in \left(0,\frac{\pi }{2}\right)$ be the solution curve of the differential equation $2{\mathrm{e}}^{-4\mathrm{x}}(2\sin 2\mathrm{x}+\cos 2\mathrm{x}),$ with …

Q11.If the tangents drawn at the points P and Q on the parabola ${\mathrm{y}}^2=2\mathrm{x}-3$ intersect at the point $\mathrm{R}(0,1)$, then the orthocentre of the triangle PQR is :

Q12.Let C be the centre of the circle ${\mathrm{x}}^2+{\mathrm{y}}^2-\mathrm{x}+2\mathrm{y}=\frac{11}{4}$ and P be a point on the circle. A line passes through the point C , makes an angle of $\frac{\pi }{4}$ with the line CP and intersects the circle at the points Q and R . The …

Q13.The remainder when $7^{2022}+3^{2022}$ is divided by 5 is:

Q14.Let the matrix $\mathrm{A}=\left[\begin{array}{ccc}0& 1& 0\\ 0& 0& 1\\ 1& 0& 0\end{array}\right]$ and the matrix $B_0=A^{49}+2A^{98}$. If $B_n=\mathrm{Adj}\left(B_{n-1}\right)$ for all $n\ge 1$, then $\det \left({\mathrm{B}}_4\right)$ is equal to …

Q15.Let $S_1=\left\{z_1\in C:\left|z_1-3\right|=\frac{1}{2}\right\}$ and $S_2=\left\{z_2\in C:\left|z_2-\left|z_2+1\right|\right|=\left|z_2+\left|z_2-1\right|\right|\right\}$. Then, for ${\mathrm{z}}_1\in {\mathrm{S}}_1$ and ${\mathrm{z}}_2\in {\mathrm{S}}_2$, …

Q16.The foot of the perpendicular from a point on the circle $x^2+y^2=1,z=0$ to the plane $2x+3y+z=6$ lies on which one of the following curves?

Q17.If the minimum value of $f(x)=\frac{5x^2}{2}+\frac{\alpha }{x^5},x>0$, is 14, then the value of $\alpha$ is equal to :

Q18.Let $\alpha ,\beta$ and $\gamma$ be three positive real numbers. Let $\mathrm{f}(\mathrm{x})=\alpha {\mathrm{x}}^5+\beta {\mathrm{x}}^3+\gamma \mathrm{x},\mathrm{x}\in \mathrm{R}$ and $\mathrm{g}:\mathrm{R}\to \mathrm{R}$ be such that …

Q19.Consider the sequence ${\mathrm{a}}_1,{\mathrm{a}}_2,{\mathrm{a}}_3,\dots$ such that ${\mathrm{a}}_1=1,{\mathrm{a}}_2=2$ and ${\mathrm{a}}_{\mathrm{n}+2}=\frac{2}{{\mathrm{a}}_{\mathrm{n}+1}}+{\mathrm{a}}_{\mathrm{n}}$ for $\mathrm{n}=1,2,3,\dots$. If …

Q20.The minimum value of the twice differentiable function $\mathrm{f}(\mathrm{x})={\int }_0^{\mathrm{x}}{\mathrm{e}}^{\mathrm{x}-\mathrm{t}}{\mathrm{f}}^{\prime }(\mathrm{t})\mathrm{dt}-\left({\mathrm{x}}^2-\mathrm{x}+1\right){\mathrm{e}}^{\mathrm{x}},\mathrm{x}\in \mathrm{R}$, is :

Q21.Let S be the set of all passwords which are six to eight characters long, where each character is either an alphabet from $\{\mathrm{A},\mathrm{B},\mathrm{C},\mathrm{D},\mathrm{E}\}$ or a number from $\{1,2,3,4,5\}$ with the repetition of characters allowed. If the number of …

Q22.Let $\mathrm{P}(-2,-1,1)$ and $\mathrm{Q}\left(\frac{56}{17},\frac{43}{17},\frac{111}{17}\right)$ be the vertices of the rhombus PRQS. If the direction ratios of the diagonal RS are $\alpha ,-1,\beta$, where both $\alpha$ and $\beta$ are integers of minimum absolute values, the …

Q23.Let $\mathrm{f}:[0,1]\to \mathrm{R}$ be a twice differentiable function in $(0,1)$ such that $\mathrm{f}(0)=3$ and $\mathrm{f}(1)=5$. If the line $\mathrm{y}=2\mathrm{x}+3$ intersects the graph of f at only two distinct points in $(0,1)$, then the least number of points …

Q24.If ${\int }_0^{\sqrt{3}}\frac{15{\mathrm{x}}^3}{\sqrt{1+{\mathrm{x}}^2+\sqrt{{\left(1+{\mathrm{x}}^2\right)}^3}}}\mathrm{dx}=\alpha \sqrt{2}+\beta \sqrt{3}$, where $\alpha ,\beta$ are integers, then $\alpha +\beta$ is equal to ____.

Q25.Let $\mathrm{A}=\left[\begin{array}{cc}1& -1\\ 2& \alpha \end{array}\right]$ and $\mathrm{B}=\left[\begin{array}{cc}\beta & 1\\ 1& 0\end{array}\right],\alpha ,\beta \in \mathrm{R}$. Let ${\alpha }_1$ be the value of $\alpha$ which satisfies …

Q26.For $p,q\in R$, consider the real valued function $\mathrm{f}(\mathrm{x})=(\mathrm{x}-\mathrm{p}{)}^2-\mathrm{q},\mathrm{x}\in \mathrm{R}$ and $\mathrm{q}>0$. Let ${\mathrm{a}}_1,{\mathrm{a}}_2,{\mathrm{a}}_3$ and ${\mathrm{a}}_4$ be in an arithmetic progression with mean p …

Q27.For the hyperbola H : $x^2-y^2=1$ and the ellipse $\mathrm{E}:\frac{{\mathrm{x}}^2}{{\mathrm{a}}^2}+\frac{{\mathrm{y}}^2}{{\mathrm{b}}^2}=1,\mathrm{a}>\mathrm{b}>0$, let the
(1) eccentricity of $E$ be reciprocal of the eccentricity of H, and
(2) the line …

Q28.Let ${\mathrm{x}}_1,{\mathrm{x}}_2,{\mathrm{x}}_3,\dots .,{\mathrm{x}}_{20}$ be in geometric progression with ${\mathrm{x}}_1=3$ and the common ration $\frac{1}{2}$. A new data is constructed replacing each ${\mathrm{x}}_{\mathrm{i}}$ by …

Q29.${\lim }_{x\to 0}{\left(\frac{(x+2\cos x{)}^3+2(x+2\cos x{)}^2+3\sin (x+2\cos x)}{(x+2{)}^3+2(x+2{)}^2+3\sin (x+2)}\right)}^{\frac{100}{x}}$ is equal to ______.

Q30.The sum of all real values of $x$ for which $\frac{3{\mathrm{x}}^2-9\mathrm{x}+17}{{\mathrm{x}}^2+3\mathrm{x}+10}=\frac{5{\mathrm{x}}^2-7\mathrm{x}+19}{3{\mathrm{x}}^2+5\mathrm{x}+12}$ is equal to ______.