JEE Advanced 2022 — Paper 1

Considering only the principal values of the inverse trigonometric functions, the value of

$\frac{3}{2} \cos ^{-1} \sqrt{\frac{2}{2+\pi^{2}}}+\frac{1}{4} \sin ^{-1} \frac{2 \sqrt{2} \pi}{2+\pi^{2}}+\tan ^{-1} \frac{\sqrt{2}}{\pi}$ is $\qquad$

Let $\alpha$ be a positive real number. Let $f: R \rightarrow R$ and $g:(\alpha, \infty) \rightarrow R$ be the functions defined by

$f(x)=\sin \left(\frac{\pi x}{12}\right) \text { and } g(x)=\frac{2 \log _{e}(\sqrt{x}-\sqrt{\alpha})}{\log _{e}\left(e^{\sqrt{x}}-e^{\sqrt{\alpha}}\right)}$ Then the value of $\lim _{x \rightarrow \alpha^{+}} f(g(x))$ is $\qquad$ -

In a study about a pandemic, data of 900 persons was collected. It was found that 190 persons had symptom of fever, 220 persons had symptom of cough, 220 persons had symptom of breathing problem, 330 persons had symptom of fever or cough or both, 350 persons had symptom of cough or breathing problem or both, 340 persons had symptom of fever or breathing problem or both, 30 persons had all three symptoms (fever, cough and breathing problem). If a person is chosen randomly from these 900 persons, then the probability that the person has at most one symptom is $\qquad$ .

Let z be a complex number with non-zero imaginary part. If $\frac{2+3 z+4 z^{2}}{2-3 z+4 z^{2}}$ is a real number,

then the value of $|z|^{2}$ is

Let $\bar{z}$ denote the complex conjugate of a complex number z and let $i=\sqrt{-1}$. In the set of complex numbers,

the number of distinct roots of the equation $\bar{z}-z^{2}=i\left(\bar{z}+z^{2}\right)$ is

Let $l_{1}, l_{2}, \ldots ., l_{100}$ be consecutive terms of an arithmetic with common difference $d_{1}$, and let

$w_{1}, w_{2}, \ldots . ., w_{100}$ be consecutive terms of another arithmetic progression with common difference $d_{2}$,

where $d_{1} d_{2}=10$. For each $i=1,2, \ldots ., 100$, let $R_{i}$ be a rectangle with length $l_{i}$, width $w_{i}$

and area $A_{i}$. If $A_{51}-A_{50}=1000$, then the value of $A_{100}-A_{90}$ is $\qquad$ .

The number of 4-digit integers in the closed interval [2022, 4482] formed by using the digits $0,2,3,4,6,7$ is $\qquad$ .

Let $A B C$ be the triangle with $A B=1, A C=3$ and $\angle B A C=\frac{\pi}{2}$. If a circle of radius $r>0$ touches the sides $A B, A C$ and also touches internally the Circumcircle of the triangle $A B C$, then the value of $r$ is

Consider the equation $\int_{1}^{e} \frac{\left(\log _{e} x\right)^{\frac{1}{2}}}{x\left(a-\left(\log _{e} x\right)^{\frac{3}{2}}\right)^{2}} d x=1, a \in(-\infty, 0) \cup(1, \infty)$. Which of the following

statements is/are TRUE?

Let $a_{1}, a_{2}, a_{3}, \ldots .$. be an arithmetic progression with $a_{1}=7$ and common difference 8 .

Let $T_{1}, T_{2}, T_{3}, \ldots .$. be such that $T_{1}=3$ and $T_{n+1}-T_{n}=a_{n}$ for $\mathrm{n} \geq 1$.

Then, which of the following is/are TRUE?

Let $P_{1}$ and $P_{2}$ be two planes given by $P_{1}: 10 x+15 y+12 z-60=0, P_{2}:-2 x+5 y+4 z-20=0$.

Which of the following straight lines can be an edge of some tetrahedron whose two faces lie on $P_{1}$ and $P_{2}$ ?

Let $S$ be the reflection of a point $Q$ with respect to the plane given by $\vec{r}=-(t+p) \hat{i}+t \hat{j}+(1+p) \hat{k}$ where $t$, $p$ are real parameters and $\hat{i}, \hat{j}, \hat{k}$ are the unit vectors along the three positive coordinate axes. If the position vectors of $Q$ and $S$ are $10 \hat{i}+15 \hat{j}+20 \hat{k}$ and $\alpha \hat{i}+\beta \hat{j}+\gamma \hat{k}$ respectively, then which of the following is/are TRUE?

Consider the parabola ${{y}^{2}}=4x$. Let $S$ be the focus of the parabola. A pair of tangents drawn to the parabola from the point

$P=\left( -2,1 \right)$ meet the parabola at ${{P}_{1}}$ and ${{P}_{2}}$. Let ${{Q}_{1}}$ and ${{Q}_{2}}$ be points on the lines

$S{{P}_{1}}$ and $S{{P}_{2}}$ respectively such that $P{{Q}_{1}}$ is perpendicular to $S{{P}_{1}}$ and $P{{Q}_{2}}$

is perpendicular to $S{{P}_{2}}$. Then, which of the following is/are TRUE?

If $f(x)=\left|\begin{array}{ccc}\cos (2 x) & \cos (2 x) & \sin (2 x) \\ -\cos x & \cos x & -\sin x \\ sin x & \sin x & \cos x\end{array}\right|$, then

Consider the following lists:

Two players, $P_{1}$ and $P_{2}$, play a game against each other. In every round of the game, each player rolls a fair die once,

where the six faces of the die have six distinct numbers. Let $x$ and $y$ denote the readings on the die rolled by $P_{1}$ and $P_{2}$,

respectively. If $\mathrm{x}>\mathrm{y}$, then $P_{1}$ scores 5 points and $P_{2}$ scores 0 points.

If $x=y$, then each player scores 2 points. If $x

Let $p, q, r$ be nonzero real numbers that are, respectively, the $10^{\text {th }}, 100^{\text {th }}$ and $1000^{\text {th }}$

terms of a harmonic progression. Consider the system of linear equation

Consider the ellipse $\frac{x^{2}}{4}+\frac{y^{2}}{3}=1$. Let $H(\alpha, 0), 0<\alpha<2$, be a point. A straight line drawn through $H$ parallel to

$y$-axis crosses the ellipse and its auxiliary circle at points $E$ and $F$ respectively, in the first quadrant.

The tangents to the ellipse at the point $E$ intersects the positive $x$-axis at a point $G$. Suppose the straight line joining

$F$ and the origin makes an angle $\phi$ with the positive $x$-axis.

Two spherical stars A and B have densities $\rho_{\mathrm{A}}$ and $\rho_{\mathrm{B}}$, respectively.

A and B have the same radius, and their masses $M_{A}$ and $M_{B}$ are related by $M_{B}=2 M_{A}$.

Due to an interaction process, star A loses some of its mass, so that its radius is halved, while its spherical shape is retained,

and its density remains $\rho_{\mathrm{A}}$. The entire mass lost by $A$ is deposited as a thick spherical shell on

$B$ with the density of the shell being $\rho_{A}$. If $v_{A}$ and $v_{B}$ are the escape velocities from A and B after the interaction process,

the ratio $\frac{v_{B}}{v_{A}}=\sqrt{\frac{10 n}{15^{1 / 3}}}$. The value of n is

The minimum kinetic energy needed by an alpha particle to cause the nuclear reaction

${ }_{7}^{16} N+{ }_{2}^{4} \mathrm{He} \rightarrow{ }_{1}^{1} \mathrm{H}+{ }_{8}^{19} \mathrm{O}$ in a laboratory frame is n (in MeV ).

Assume that ${ }_{7}^{16} N$ is at rest in the laboratory frame.

The masses of ${ }_{7}^{16} \mathrm{~N},{ }_{2}^{4} \mathrm{He},{ }_{1}^{1} \mathrm{H}$

and ${ }_{8}^{19} \mathrm{O}$ can be taken to be $16.006 \mathrm{u}, 4.003 \mathrm{u}, 1.008$

$u$ and 19.003 u , respectively, where $1 \mathrm{u}=930 \mathrm{MeVc}^{-2}$. The value of n is $\qquad$ .

In the following circuit $\mathrm{C}_{1}=12 \mu \mathrm{~F}, \mathrm{C}_{2}=\mathrm{C}_{3}=4 \mu \mathrm{~F}$ and $\mathrm{C}_{4}=\mathrm{C}_{5}=2$ $\mu \mathrm{F}$.

The charge stored in $\mathrm{C}_{3}$ is $\mu \mathrm{C}$.

A rod of length 2 cm makes an angle $\frac{2 \pi}{3} \mathrm{rad}$ with the principal axis of a thin convex lens.

The lens has a focal length of 10 cm and is placed at a distance of $\frac{40}{3} \mathrm{~cm}$ from the object as shown in the figure,

The is $\frac{30 \sqrt{3}}{13}$ and the angle made by it with respect to the principal axis is $\alpha$ rad.

The value of $\alpha$ is $\frac{\pi}{n} \mathrm{rad}$, where n is $\qquad$

At time $\mathrm{t}=0$, a disk of radius 1 m starts to roll without slipping on a horizontal plane with an angular acceleration of $\alpha=\frac{2}{3} \mathrm{rad} \mathrm{s}{ }^{-2}$. A small stone is stuck to the disk. At $\mathrm{t}=0$, it is at the contact point of the disk and the plane. Later, at time $t=\sqrt{ } \mathrm{s}$, the stone detaches itself and flies off tangentially from the disk. The maximum height (in m ) reached by the stone measured from the plane is $\frac{1}{2}+\frac{x}{10}$. The value of $x$ is $\qquad$ [Take $\mathrm{g}=10 \mathrm{~ms}^{-2}$.]

A solid sphere of mass 1 kg and radius 1 m rolls without slipping on a fixed inclined plane with an angle of inclination $\theta=30^{\circ}$ from the horizontal. Two forces of magnitude 1 N each, parallel to the incline, act on the sphere, both at distance $\mathrm{r}=0.5 \mathrm{~m}$ from the center of the sphere, as shown in the figure. The acceleration of the sphere down the plane is $\qquad$ $\mathrm{ms}^{-2}$. (Take $\mathrm{g}=10 \mathrm{~ms}^{-2}$.)

Consider an LC circuit, with inductance $\mathrm{L}=0.1 \mathrm{H}$ and capacitance $\mathrm{C}=10^{-3} \mathrm{~F}$, kept on a plane. The area of the circuit is $1 \mathrm{~m}^{2}$. It is placed in a constant magnetic field of strength $B_{0}$ which is perpendicular to the plane of the circuit. At time $t=0$, the magnetic field strength starts increasing linearly as $B=B_{0}+\beta t$ with $\beta=0.04 \mathrm{Ts}^{-1}$. The maximum magnitude of the current in the circuit is $\qquad$ mA .

A projectile is fired from horizontal ground with speed v and projection angle $\theta$.

When the acceleration due to gravity is g , the range of the projectile is d . If at the highest point in its trajectory,

the projectile enters a different region where the effective acceleration due to gravity is $g^{\prime}=\frac{g}{0.81}$,

then the new range is $\mathrm{d}^{\prime}=\mathrm{nd}$. The value of $n$ is $\qquad$ .

A medium having dielectric constant $K>1$ fills the space between the plates of a parallel plate capacitor.

The plates have large area, and the distance between them is $d$. The capacitor is connected to a battery of voltage $V$,

as shown in Figure (a). Now, both the plates are moved by a distance $\mathrm{d} / 2$ of from their original positions, as shown in

Figure (b). In the process of going from the configuration depicted in Figure (a) to that in Figure (b),

which of the following statement(s) is(are) correct?

The figure shows a circuit having eight resistances of $1 \Omega$ each, labelled $\mathrm{R}_{1}$ to $\mathrm{R}_{8}$,

and two ideal batteries with voltages $\varepsilon_{1}=12 \mathrm{~V}$ and $\varepsilon_{2}=6 \mathrm{~V}$.

Which of the following statement(s) is(are) correct?

An ideal gas of density $\rho=0.2 \mathrm{~kg} \mathrm{~m}^{-3}$ enters a chimney of height h at the rate of

$\alpha=0.8 \mathrm{~kg} \mathrm{~s}^{-1}$ from its lower end, and escapes through the upper end as shown in the figure.

The cross-sectional area of the lower end is $\mathrm{A}_{1}=0.1 \mathrm{~m}^{2}$ and the upper end is

$\mathrm{A}_{2}=0.4 \mathrm{~m}^{2}$. The pressure and the temperature of the gas at the lower end are 600 Pa and 300 K ,

respectively, while its temperature at the upper end is 150 K . The chimney is heat insulated so that the gas undergoes adiabatic expansion.

Take $g=10 \mathrm{~ms}^{-2}$ and the ratio of specific heats of the gas $\gamma=2$. Ignore atmospheric pressure.

Which of the following statement(s) is(are) correct?

Three plane mirrors form an equilateral triangle with each side of length L.

There is a small hole at a distance $l>0$ from one of the corners as shown in the figure. A ray of light is passed through the hole at an angle

$\theta$ and can only come out through the same hole. The cross section of the mirror configuration and the ray of light lie on the same plane.

Which of the following statement(s) is(are) correct?

Six charges are placed around a regular hexagon of side length a as shown in the figure. Five of them have charge q , and the remaining one has charge x .The perpendicular from each charge to the nearest hexagon side passes through the center O of the hexagon and is bisected by the side. Which of the following statement(s) is(are) correct in SI units?

List I describes four systems, each with two particles $A$ and $B$ in relative motion as shown in figures.

List II gives possible magnitudes of their relative velocities (in $\mathrm{m} \mathrm{s}^{-1}$ ) at time

$\mathrm{t}=\frac{\pi}{3} \mathrm{~s}$.

List -I	List -II
(I)	A and B are moving on a horizontal circle of radius 1 m with uniform angular speed $\omega =1\text{rad}{{\text{s}}^{-1}}$. The initial angular positions of A and B at time $\text{t}=0$ are $\theta =0$ and $\theta =\frac{\pi }{2}$, respectively.	(P)	$\frac{\sqrt{3}+1}{2}$
(II)	Projectiles A and B are fired (in the same vertical plane) at t $=0$ and $\text{t}=0.1\text{ }\!\!~\!\!\text{ s}$ respectively, with the same speed $\text{v}=\frac{5\pi }{\sqrt{2}}$ $\text{m}{{\text{s}}^{-1}}$ and at ${{45}^{\circ }}$ from the horizontal plane. The initial separation between $A$ and $B$ is large enough so that they do not collide. $\left( \text{g}=10\text{ }\!\!~\!\!\text{ m }\!\!~\!\!\text{ }{{\text{s}}^{-2}} \right)$.	(Q)	$\frac{\left( \sqrt{3}-1 \right)}{\sqrt{2}}$
(III)	Two harmonic oscillators A and B moving in the x direction according to ${{\text{x}}_{\text{A}}}={{\text{x}}_{0}}\text{sin}\frac{\text{t}}{{{\text{t}}_{0}}}$ and ${{\text{x}}_{\text{B}}}={{\text{x}}_{0}}\text{sin}\left( \frac{\text{t}}{{{\text{t}}_{0}}}+\frac{\pi }{2} \right)$ respectively, starting from $t=0$. Take ${{x}_{0}}=1\text{ }\!\!~\!\!\text{ m},{{\text{t}}_{0}}=1\text{ }\!\!~\!\!\text{ s}$.	(R)	$\sqrt{10}$
	Particle A is rotating in a horizontal circular path of radius 1 m on the xy plane, with constant angular speed w = 1 rad s–1. Particle B is moving up at a constant speed 3 m s–1 in the vertical direction as shown in the figure. (Ignore gravity.)	(S)	$\sqrt{2}$
			$\sqrt{25{{\pi }^{2}}+1}$

List I describes thermodynamic processes in four different systems. List II gives the magnitudes (either exactly or as a close approximation) of possible changes in the internal energy of the system due to the process.

List I contains four combinations of two lenses (1 and 2) whose focal lengths (in cm ) are indicated in the figures.

In all cases, the object is placed 20 cm from the first lens on the left, and the distance between the two lenses is 5 cm .

List II contains the positions of the final images.

List -I	List -II
(I)		(P)	Final image is formed at 7.5 cm on the right side of lens 2 .
(II)		(Q)	Final image is formed at 60.0 cm on the right side of lens 2 .
(III)		(R)	Final image is formed at 30.0 cm on the left side of lens 2.
(IV)		(S)	Final image is formed at 6.0 cm on the right side of lens 2 .
		(T)	Final image is formed at 30.0 cm on the right side of lens 2.

$2 \mathrm{~mol}$ of $\mathrm{Hg}(g)$ is combusted in a fixed volume bomb calorimeter with excess of

$\mathrm{O}_{2}$ at 298 K and 1 atm into $\mathrm{HgO}(s)$. During the reaction, temperature increases from 298.0 K to 312.8 K .

If heat capacity of the bomb calorimeter and enthalpy of formation of $\mathrm{Hg}(g)$ are $20.00 \mathrm{~kJ} \mathrm{~K}^{-1}$

and $61.32 \mathrm{~kJ} \mathrm{~mol}^{-1}$ at 298 K , respectively, the calculated standard molar enthalpy of formation of

$\mathrm{HgO}(s)$ at $298 \mathrm{~K}^{\text {is }} \mathrm{X} \mathrm{kJ} \mathrm{mol}^{-1}$. The value of $|\mathrm{X}|$ is

The reduction potential $\left(\mathrm{E}^{0}\right.$, in V$)$ of

$\mathrm{MnO}_{4}^{-}(\mathrm{aq}) / \mathrm{Mn}(\mathrm{s})$ is $\left[\right.$

Given : $\left.\mathrm{E}_{\left(\mathrm{MnO}_{4}^{-}(\mathrm{aq}) / \mathrm{MnO}_{2}((\mathrm{~s}))\right)}^{0}=1.68 \mathrm{~V} ; \mathrm{E}_{\left(\mathrm{MnO}_{2}(\mathrm{~s}) / \mathrm{Mn}^{2+}(\mathrm{aq})\right)}^{0}=1.21 \mathrm{~V} ; \mathrm{E}_{\left.\left(\mathrm{Mn}^{2+}(\mathrm{aq}) / \mathrm{Mn}(\mathrm{s})\right)\right)}^{0}=-1.03 \mathrm{~V}\right]$

A solution is prepared by mixing 0.01 mol each of

$\mathrm{H}_{2} \mathrm{CO}_{3}, \mathrm{NaHCO}_{3}, \mathrm{Na}_{2} \mathrm{CO}_{3}$,

and NaOH in 100 mL of water. $p \mathrm{H}$ of the resulting solution is $\qquad$ .

[0pt] [Given: $p \mathrm{Ka}_{1}$ and $p \mathrm{Ka}_{2}$ of $\mathrm{H}_{2} \mathrm{CO}_{3}$

are $\overline{6.37}$ and 10.32 , respectively; $\log 2=0.30$ ]

The treatment of an aqueous solution of 3.74 g of $\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}$

with excess KI results in a brown solution along with the formation of a precipitate. Passing $\mathrm{H}_{2} \mathrm{~S}$

through this brown solution gives another precipitate $\mathbf{X}$.

The amount of $\mathbf{X}$ (in $g$ ) is $\qquad$ .[0pt]

[Given: Atomic mass of $\mathrm{H}=1, \mathrm{~N}=14, \mathrm{O}=16, \mathrm{~S}=32, \mathrm{~K}=39, \mathrm{Cu}=63, \mathrm{I}=127$ ]

Dissolving 1.24 g of white phosphorous in boiling NaOH solution in an inert atmosphere gives a gas $\mathbf{Q}$. The amount of $\mathrm{CuSO}_{4}$ (in g ) required to completely consume the gas $\mathbf{Q}$ is $\qquad$ .

[Given: Atomic mass of $\mathrm{H}=1, \mathrm{O}=16, \mathrm{Na}=23, \mathrm{P}=31, \mathrm{~S}=32, \mathrm{Cu}=63$ ]

The weight percentage of hydrogen in $\mathbf{Q}$, formed in the following reaction sequence, is $\_\_\_\_\_\_$ . conc. $\mathrm{HNO}_{3}$ [Given: Atomic mass of $\mathrm{H}=1, \mathrm{C}=12, \mathrm{~N}=14, \mathrm{O}=16, \mathrm{~S}=32, \mathrm{Cl}=35$ ]

If the reaction sequence given below is carried out with 15 moles of acetylene, the amount of the product D formed (in $g$ ) is $\_\_\_\_\_\_\_\_$ -. The yields of $\mathbf{A}, \mathbf{B}, \mathbf{C}$ and $\mathbf{D}$ are given in parentheses.[0pt] [Given: Atomic mass of $\mathrm{H}=1, \mathrm{C}=12, \mathrm{O}=16, \mathrm{Cl}=35$ ]

The correct opion(s) related to adsorption process is (are)

The electrochemical extraction of aluminum from bauxite ore involves

The treatment of galena with $\mathrm{HNO}_{3}$ produces a gas that is

Match the rate expressions in LIST-I for the decomposition of X with the corresponding profiles provided in LIST-II. $\mathrm{X}_{\mathrm{s}}$ and k are constants having appropriate units.

List I	List II
I. $\text{rate} = \frac{k[X]}{X_{s} + [X]}$ under all possible initial concentrations of $X$.	(P)
II. $\text{rate} = \frac{k[X]}{X_{s} + [X]}$ where initial concentrations of $X$ are much less than $X_{s}$.	(Q)
III. $\text { rate }=\frac{\mathrm{k}[\mathrm{X}]}{\mathrm{X}_{\mathrm{s}}+[\mathrm{X}]}$ where initial concentrations of $X$ are much higher than $\mathrm{X}_{\mathrm{s}}$	(R)
IV. $\text { rate }=\frac{\mathrm{k}[\mathrm{X}]^{2}}{\mathrm{X}_{\mathrm{s}}+[\mathrm{X}]}$ where initial concentration of $X$ is much higher than $X_{s}$	(S)
	(T)

LIST-I contains compounds and LIST-II contains reactions.

Match each compound in LIST-I with its formation reaction(s) in LIST-II, and choose the correct option