JEE Main 1 February 2023 Shift 2 Question Paper

Question 1

Let $\alpha x=\exp(x^{\beta}y^{\gamma})$ be the solution of the differential equation $2x^2y\,dy-(1-xy^2)dx=0$, $x>0$, $y(2)=\sqrt{\log_e 2}$. Then $\alpha+\beta+\gamma$ equals:

Accepted Answer

(A) $1$

Answer

(B) $-1$

Answer

(C) $3$

Answer

(D) $0$

Question 2

The sum $\sum_{n=1}^{\infty}\dfrac{2n^2+3n+4}{(2n)!}$ is equal to:

Accepted Answer

(D) $\dfrac{13e}{4}+\dfrac{5}{4e}-4$

Answer

(A) $\dfrac{13e}{4}+\dfrac{5}{4e}$

Answer

(B) $\dfrac{11e}{2}+\dfrac{7}{2e}-4$

Answer

(C) $\dfrac{11e}{2}+\dfrac{7}{2e}$

Question 3

Let $\vec a=5\hat i-\hat j-3\hat k$ and $\vec b=\hat i+3\hat j+5\hat k$ be two vectors. Then which one of the following statements is TRUE?

Accepted Answer

(D) Projection of $\vec a$ on $\vec b$ is $\dfrac{-13}{\sqrt{35}}$ and the direction of the projection vector is opposite to the direction of $\vec b$.

Answer

(A) Projection of $\vec a$ on $\vec b$ is $\dfrac{13}{\sqrt{35}}$ and the direction of the projection vector is same as of $\vec b$.

Answer

(B) Projection of $\vec a$ on $\vec b$ is $\dfrac{13}{\sqrt{35}}$ and the direction of the projection vector is opposite to the direction of $\vec b$.

Answer

(C) Projection of $\vec a$ on $\vec b$ is $\dfrac{-13}{\sqrt{35}}$ and the direction of the projection vector is same as of $\vec b$.

Question 4

Let $\vec a=2\hat i-7\hat j+5\hat k$, $\vec b=\hat i+\hat k$ and $\vec c=\hat i+2\hat j-3\hat k$ be three given vectors. If $\vec r$ is a vector such that $\vec r	imes\vec a=\vec c	imes\vec a$ and $\vec r\cdot\vec b=0$, then $|\vec r|$ is equal to:

Accepted Answer

(C) $\dfrac{11}{7}\sqrt2$

Answer

(A) $\dfrac{11}{5}\sqrt2$

Answer

(B) $\dfrac{\sqrt{914}}{7}$

Answer

(D) $\dfrac{11}{7}$

Question 5

Let $f:\mathbb{R}-\{0,1\}	o\mathbb{R}$ be a function such that $f(x)+f\left(\dfrac{1}{1-x}ight)=1+x$. Then $f(2)$ is equal to

Accepted Answer

(C) $\dfrac94$

Answer

(A) $\dfrac92$

Answer

(B) $\dfrac74$

Answer

(D) $\dfrac73$

Question 6

Let $P(S)$ denote the power set of $S=\{1,2,3,\ldots,10\}$. Define the relations $R_1$ and $R_2$ on $P(S)$ as $AR_1B$ if $(A\cap B^c)\cup(B\cap A^c)=\varnothing$ and $AR_2B$ if $A\cup B^c=B\cup A^c$, $\forall A,B\in P(S)$. Then:

Accepted Answer

(C) both $R_1$ and $R_2$ are equivalence relations

Answer

(A) only $R_1$ is an equivalence relation

Answer

(B) only $R_2$ is an equivalence relation

Answer

(D) both $R_1$ and $R_2$ are not equivalence relations

Question 7

The area of the region given by $\{(x,y):xy\leq 8,\,1\leq y\leq x^2\}$ is:

Accepted Answer

(B) $16\log_e 2-\dfrac{14}{3}$

Answer

(A) $16\log_e 2+\dfrac73$

Answer

(C) $8\log_e 2-\dfrac{13}{3}$

Answer

(D) $8\log_e 2+\dfrac76$

Question 8

If $A=\dfrac12\begin{bmatrix}1&\sqrt3\-\sqrt3&1\end{bmatrix}$, then:

Accepted Answer

(C) $A^{30}+A^{25}-A=I$

Answer

(A) $A^{30}+A^{25}+A=I$

Answer

(B) $A^{30}=A^{25}$

Answer

(D) $A^{30}-A^{25}=2I$

Question 9

Which of the following statements is a tautology?

Accepted Answer

(C) $(p\wedge q)	o(\sim(p)	o q)$

Answer

(A) $p\vee(p\wedge q)$

Answer

(B) $(p\wedge(p	o q))	o\sim q$

Answer

(D) $p	o(p\wedge(p	o q))$

Question 10

The sum of the absolute maximum and minimum values of the function $f(x)=|x^2-5x+6|-3x+2$ in the interval $[-1,3]$ is equal to:

Accepted Answer

(D) $24$

Answer

(A) $12$

Answer

(B) $13$

Answer

(C) $10$

Question 11

Let the plane P pass through the intersection of the planes $x+3y-z=2$ and $x+2y+3z=6$ and be perpendicular to the plane $2x+y-z=0$. If d is the distance of P from the point $(-7,1,1)$, then $d^2$ is equal to:

Accepted Answer

(A) $\dfrac{250}{83}$

Answer

(B) $\dfrac{250}{82}$

Answer

(C) $\dfrac{15}{53}$

Answer

(D) $\dfrac{25}{83}$

Question 12

The number of integral values of k, for which one root of the equation $2x^2-8x+k=0$ lies in the interval $(1,2)$ and its other root lies in the interval $(2,3)$, is:

Accepted Answer

(D) $1$

Answer

(A) $3$

Answer

(B) $0$

Answer

(C) $2$

Question 13

Let $P(x_0,y_0)$ be the point on the hyperbola $3x^2-4y^2=36$, which is nearest to the line $3x+2y=1$. Then $\sqrt2(y_0-x_0)$ is equal to:

Accepted Answer

(A) $-9$

Answer

(B) $-3$

Answer

(C) $3$

Answer

(D) $9$

Question 14

Two dice are thrown independently. Let A be the event that the number appeared on the $1^{st}$ die is less than the number appeared on the $2^{nd}$ die, B be the event that the number appeared on the $1^{st}$ die is even and that on the second die is odd, and C be the event that the number appeared on the $1^{st}$ die is odd and that on the $2^{nd}$ die is even. Then:

Accepted Answer

(B) the number of favourable cases of the event $(A\cup B)\cap C$ is 6

Answer

(A) the number of favourable cases of the events A, B and C are 15, 6 and 6 respectively

Answer

(C) B and C are independent

Answer

(D) A and B are mutually exclusive

Question 15

If $y(x)=x^x,\ x>0$, then $y''(2)-2y'(2)$ is equal to

Accepted Answer

(D) $4(\log_e 2)^2-2$

Answer

(A) $4\log_e 2+2$

Answer

(B) $8\log_e 2-2$

Answer

(C) $4(\log_e 2)^2+2$

Question 16

Let $S=\left\{x\in\mathbb{R}:0<x<1	ext{ and }2	an^{-1}\left(\dfrac{1-x}{1+x}ight)=\cos^{-1}\left(\dfrac{1-x^2}{1+x^2}ight)ight\}$. If $n(S)$ denotes the number of elements in S then:

Accepted Answer

(A) $n(S)=2$ and only one element in S is less than $\dfrac12$.

Answer

(B) $n(S)=1$ and the element in S is more than $\dfrac12$.

Answer

(C) $n(S)=0$

Answer

(D) $n(S)=1$ and the element in S is less than $\dfrac12$.

Question 17

The value of the integral $\int_{-\frac{\pi}{4}}^{\frac{\pi}{4}}\dfrac{x+\frac{\pi}{4}}{2-\cos 2x}dx$ is:

Accepted Answer

(B) $\dfrac{\pi^2}{6\sqrt3}$

Answer

(A) $\dfrac{\pi^2}{12\sqrt3}$

Answer

(C) $\dfrac{\pi^2}{6}$

Answer

(D) $\dfrac{\pi^2}{3\sqrt3}$

Question 18

For the system of linear equations $\alpha x+y+z=1$, $x+\alpha y+z=1$, $x+y+\alpha z=\beta$, which one of the following statements is NOT correct?

Accepted Answer

(A) It has infinitely many solutions if $\alpha=2$ and $\beta=-1$

Answer

(B) It has no solution if $\alpha=-2$ and $\beta=1$

Answer

(C) $x+y+z=\dfrac34$ if $\alpha=2$ and $\beta=1$

Answer

(D) It has infinitely many solutions if $\alpha=1$ and $\beta=1$

Question 19

Let $9=x_1<x_2<\ldots<x_7$ be in an A.P. with common difference d. If the standard deviation of $x_1,x_2,\ldots,x_7$ is 4 and mean is $\bar x$, then $\bar x+x_6$ is equal to:

Accepted Answer

(D) $34$

Answer

(A) $2\left(9+\dfrac{8}{\sqrt7}\right)$

Answer

(B) $18\left(1+\dfrac{1}{\sqrt3}\right)$

Answer

(C) $25$

Question 20

Let $\alpha x+\beta y+\gamma z=1$ be the equation of a plane through the point $(3,-2,5)$ and perpendicular to the line joining the points $(1,2,3)$ and $(-2,3,5)$. Then the value of $\alpha\beta\gamma$ is equal to

Accepted Answer

6

Question 21

If the term without x in the expansion of $\left(x^{\frac23}+\dfrac{\alpha}{x^3}\right)^{22}$ is 7315, then $|\alpha|$ is equal to

Accepted Answer

1

Question 22

If the x-intercept of a focal chord of the parabola $y^2=8x+4y+4$ is 3, then the length of this chord is equal to

Accepted Answer

16

Question 23

Let the sixth term in the binomial expansion of $\left(\sqrt{2^{\log_2(10-3^x)}}+\sqrt[5]{2^{(x-2)\log_2 3}}\right)^m$, in the increasing powers of $2^{(x-2)\log_2 3}$, be 21. If the binomial coefficients of the second, third and fourth terms in the expansion are respectively the first, third and fifth terms of an A.P., then the sum of the squares of all possible values of x is

Accepted Answer

4

Question 24

The point of intersection C of the plane $8x+y+2z=0$ and the line joining the points $A(-3,-6,1)$ and $B(2,-4,-3)$ divides the line segment AB internally in the ratio k:1. If a, b, c ($[a],[b],[c]$ are coprime) are the direction ratios of the perpendicular from the point C on the line $\dfrac{1-x}{1}=\dfrac{y+4}{2}=\dfrac{z+2}{3}$, then $|a+b+c|$ is equal to

Accepted Answer

10

Question 25

The line $x=8$ is the directrix of the ellipse $E:\dfrac{x^2}{a^2}+\dfrac{y^2}{b^2}=1$ with the corresponding focus $(2,0)$. If the tangent to E at the point P in the first quadrant passes through the point $(0,4\sqrt3)$ and intersects the x-axis at Q, then $(3PQ)^2$ equal to

Accepted Answer

39

Question 26

The total number of six digit numbers, formed using the digits 4, 5, 9 only and divisible by 6, is

Accepted Answer

81

Question 27

Number of integral solutions to the equation $x+y+z=21$, where $x\geq 1$, $y\geq 3$, $z\geq 4$, is equal to

Accepted Answer

105

Question 28

The sum of the common terms of the following three arithmetic progressions: $3,7,11,15,\ldots,399$; $2,5,8,11,\ldots,359$ and $2,7,12,17,\ldots,197$ is equal to

Accepted Answer

321

Question 29

If $\int_{-\frac{\pi}{2}}^{\frac{\pi}{2}}\dfrac{5^{\cos x}\left(1+\cos x\cos 3x+\cos^2 x+\cos^3 x\cos 3x\right)}{1+5^{\cos x}}dx=\dfrac{k\pi}{16}$, then k is equal to

Accepted Answer

13

Question 30

For three low density gases A, B, C pressure versus temperature graphs are plotted while keeping them at constant volume, as shown in the figure. The temperature corresponding to the point 'K' is:

Accepted Answer

(A) $-273°C$

Answer

(B) $-100°C$

Answer

(C) $-40°C$

Answer

(D) $-373°C$

Question 31

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: For measuring the potential difference across a resistance of $600\,\Omega$, the voltmeter with resistance $1000\,\Omega$ will be preferred over voltmeter with resistance $4000\,\Omega$.
Reason R: Voltmeter with higher resistance will draw smaller current than voltmeter with lower resistance.
In the light of the above statements, choose the most appropriate answer from the options given below:

Accepted Answer

(C) A is not correct but R is correct

Answer

(A) Both A and R are correct and R is the correct explanation of A

Answer

(B) Both A and R are correct but R is not the correct explanation of A

Answer

(D) A is correct but R is not correct

Question 32

Figures (a), (b), (c) and (d) show variation of force with time. The impulse is highest in figure.

Accepted Answer

(B) Fig (b)

Answer

(A) Fig (c)

Answer

(C) Fig (d)

Answer

(D) Fig (a)

Question 33

An electron of a hydrogen like atom, having $Z=4$, jumps from $4^{th}$ energy state to $2^{nd}$ energy state. The energy released in this process, will be: (Given $Rch=13.6$ eV) where $R$ = Rydberg constant, $c$ = Speed of light in vacuum, $h$ = Planck's constant

Accepted Answer

(A) $40.8\,eV$

Answer

(B) $3.4\,eV$

Answer

(C) $10.5\,eV$

Answer

(D) $13.6\,eV$

Question 34

The ratio of average electric energy density and total average energy density of electromagnetic wave is:

Accepted Answer

(B) $\dfrac12$

Answer

(A) $3$

Answer

(C) $1$

Answer

(D) $2$

Question 35

Two objects A and B are placed at $15$ cm and $25$ cm from the pole in front of a concave mirror having radius of curvature $40$ cm. The distance between images formed by the mirror is _________.

Accepted Answer

(C) $160$ cm

Answer

(A) $100$ cm

Answer

(B) $60$ cm

Answer

(D) $40$ cm

Question 36

Equivalent resistance between the adjacent corners of a regular n-sided polygon of uniform wire of resistance R would be:

Accepted Answer

(C) $\dfrac{(n-1)R}{n^2}$

Answer

(A) $\dfrac{n^2R}{n-1}$

Answer

(B) $\dfrac{(n-1)R}{n}$

Answer

(D) $\dfrac{(n-1)R}{(2n-1)}$

Question 37

A Carnot engine operating between two reservoirs has efficiency $\dfrac13$. When the temperature of cold reservoir raised by $x$, its efficiency decreases to $\dfrac16$. The value of $x$, if the temperature of hot reservoir is $99°C$, will be:

Accepted Answer

(B) $62$ K

Answer

(A) $66$ K

Answer

(C) $33$ K

Answer

(D) $16.5$ K

Question 38

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Two metallic spheres are charged to the same potential. One of them is hollow and another is solid, and both have the same radii. Solid sphere will have lower charge than the hollow one.
Reason R: Capacitance of metallic spheres depend on the radii of spheres.
In the light of the above statements, choose the correct answer from the options given below.

Accepted Answer

(C) A is true but R is false

Answer

(A) Both A and R are true and R is the correct explanation of A

Answer

(B) Both A and R are true but R is not the correct explanation of A

Answer

(D) A is false but R is true

Question 39

If the velocity of light c, universal gravitational constant G and Planck's constant h are chosen as fundamental quantities. The dimensions of mass in the new system is:

Accepted Answer

(C) $[h^{1/2}c^{1/2}G^{-1/2}]$

Answer

(A) $[h^{1/2}c^{-1/2}G^2]$

Answer

(B) $[h^{-1/2}c^{1/2}G^{1/2}]$

Answer

(D) $[h^{1}c^{1}G^{-1}]$

Question 40

Choose the correct statement about Zener diode:

Accepted Answer

(D) It works as a voltage regulator in reverse bias and behaves like simple pn junction diode in forward bias.

Answer

(A) It works as a voltage regulator in forward bias and behaves like simple pn junction diode in reverse bias.

Answer

(B) It works as a voltage regulator only in forward bias.

Answer

(C) It works as a voltage regulator in both forward and reverse bias.

Question 41

The Young's modulus of a steel wire of length $6$ m and cross-sectional area $3$ mm$^2$, is $2	imes10^{11}$ N/m$^2$. The wire is suspended from its support on a given planet. A block of mass $4$ kg is attached to the free end of the wire. The acceleration due to gravity on the planet is $\dfrac14$ of its value on the earth. The elongation of wire is (Take $g$ on the earth $=10$ m/s$^2$):

Accepted Answer

(B) $0.1$ mm

Answer

(A) $0.1$ cm

Answer

(C) $1$ cm

Answer

(D) $1$ mm

Question 42

In an amplitude modulation, a modulating signal having amplitude of X V is superimposed with a carrier signal of amplitude Y V in first case. Then, in second case, the same modulating signal is superimposed with different carrier signal of amplitude 2Y V. The ratio of modulation index in the two cases respectively will be:

Accepted Answer

(A) $2:1$

Answer

(B) $1:2$

Answer

(C) $4:1$

Answer

(D) $1:1$

Question 43

The threshold frequency of a metal is $f_0$. When the light of frequency $2f_0$ is incident on the metal plate, the maximum velocity of photoelectrons is $v_1$. When the frequency of incident radiation is increased to $5f_0$, the maximum velocity of photoelectrons emitted is $v_2$. The ratio of $v_1$ to $v_2$ is:

Accepted Answer

(D) $\dfrac{v_1}{v_2}=\dfrac12$

Answer

(A) $\dfrac{v_1}{v_2}=\dfrac18$

Answer

(B) $\dfrac{v_1}{v_2}=\dfrac14$

Answer

(C) $\dfrac{v_1}{v_2}=\dfrac{1}{16}$

Question 44

A coil is wrapped in magnetic field such that plane of coil is perpendicular to the direction of magnetic field. The magnetic flux through a coil can be changed: A. By changing the magnitude of the magnetic field within the coil. B. By changing the area of coil within the magnetic field. C. By changing the angle between the direction of magnetic field and the plane of the coil. D. By reversing the magnetic field direction abruptly without changing its magnitude. Choose the most appropriate answer from the options given below:

Accepted Answer

(C) B, C and D only

Answer

(A) A and B only

Answer

(B) A, B and D only

Answer

(D) A and C only

Question 45

Choose the correct length (L) versus square of time period (T$^2$) graph for a simple pendulum executing simple harmonic motion.

Accepted Answer

(A) (1)

Answer

(B) (2)

Answer

(C) (3)

Answer

(D) (4)

Question 46

As shown in the figure, a long straight conductor with semicircular arc of radius $\dfrac{\pi}{10}$ m is carrying current $I=3$ A. The magnitude of the magnetic field at the center O of the arc is: (The permeability of the vacuum $=4\pi	imes10^{-7}\,NA^{-2}$)

Accepted Answer

(B) $3\,\mu T$

Answer

(A) $1\,\mu T$

Answer

(C) $4\,\mu T$

Answer

(D) $6\,\mu T$

Question 47

A block of mass $10$ kg lying on a horizontal surface is pulled by a force F acting at an angle $30°$ with horizontal. For $\mu_s=0.25$, the block will just start to move for the value of F: [Given $g=10$ ms$^{-2}$]

Accepted Answer

(C) $25.2$ N

Answer

(A) $20$ N

Answer

(B) $33.3$ N

Answer

(D) $35.7$ N

Question 48

The escape velocities of two planets A and B are in the ratio $1:2$. If the ratio of their radii respectively is $1:3$, then the ratio of acceleration due to gravity of planet A to the acceleration of gravity of planet B will be:

Accepted Answer

(C) $\dfrac34$

Answer

(A) $\dfrac32$

Answer

(B) $\dfrac23$

Answer

(D) $\dfrac43$

Question 49

For a body projected at an angle with the horizontal from the ground, choose the correct statement.

Accepted Answer

(D) Gravitational potential energy is maximum at the highest point.

Answer

(A) The vertical component of momentum is maximum at the highest point.

Answer

(B) The Kinetic Energy (K.E.) is zero at the highest point of projectile motion.

Answer

(C) The horizontal component of velocity is zero at the highest point.

Question 50

A block is fastened to a horizontal spring. The block is pulled to a distance $x=10$ cm from its equilibrium position (at $x=0$) on a frictionless surface from rest. The energy of the block at $x=5$ cm is $0.25$ J. The spring constant of the spring is _________ Nm$^{-1}$.

Accepted Answer

50

Question 51

A square shaped coil of area $70$ cm$^2$ having $600$ turns rotates in a magnetic field of $0.4$ wbm$^{-2}$, about an axis which is parallel to one of the side of the coil and perpendicular to the direction of field. If the coil completes $500$ revolution in a minute, the instantaneous emf when the plane of the coil is inclined at $60°$ with the field, will be _________ V. (Take $\pi=\dfrac{22}{7}$)

Accepted Answer

44

Question 52

In Young's double slit experiment, a thin plate of thickness $t=10\,\mu m$ and refractive index $\mu=1.2$ is inserted in front of slit $S_1$. The experiment is conducted in air ($\mu=1$) and uses a monochromatic light of wavelength $\lambda=500$ nm. Due to the insertion of the plate, central maxima is shifted by a distance of $x\beta_0$. $\beta_0$ is the fringe-width before the insertion of the plate. The value of the $x$ is _________.

Accepted Answer

4

Question 53

Moment of inertia of a disc of mass $M$ and radius '$R$' about any of its diameter is $\dfrac{MR^2}{4}$. The moment of inertia of this disc about an axis normal to the disc and passing through a point on its edge will be $\dfrac{x}{2}MR^2$. The value of $x$ is _________.

Accepted Answer

3

Question 54

For a train engine moving with speed of $20$ ms$^{-1}$, the driver must apply brakes at a distance of $500$ m before the station for the train to come to rest at the station. If the brakes were applied at half of this distance, the train engine would cross the station with speed $\sqrt{x}$ ms$^{-1}$. The value of $x$ is _________. (Assuming same retardation is produced by brakes)

Accepted Answer

200

Question 55

A cubical volume is bounded by the surfaces $x=0,\ x=a,\ y=0,\ y=a,\ z=0,\ z=a$. The electric field in the region is given by $\vec E=E_0 x\hat i$, where $E_0=4	imes10^4\,NC^{-1}m^{-1}$. If $a=2$ cm, the charge contained in the cubical volume is $Q	imes10^{-14}$ C. The value of Q is _________. (Take $\varepsilon_0=9	imes10^{-12}\,C^2/Nm^2$)

Accepted Answer

288

Question 56

A force $F=(5+3y^2)$ acts on a particle in the $y$-direction, where F is in newton and $y$ is in meter. The work done by the force during a displacement from $y=2$ m to $y=5$ m is _________ J.

Accepted Answer

132

Question 57

The surface of water in a water tank of cross section area $750$ cm$^2$ on the top of a house is $h$ m above the tap level. The speed of water coming out through the tap of cross section area $500$ mm$^2$ is $30$ cm/s. At that instant, $\dfrac{dh}{dt}$ is $x	imes10^{-3}$ m/s. The value of $x$ is _________.

Accepted Answer

2

Question 58

In the given circuit, the value of $\left|\dfrac{I_1+I_2}{I_1}\right|$ is _________.

Accepted Answer

2

Question 59

Nucleus A having $Z=17$ and equal number of protons and neutrons has $1.2$ MeV binding energy per nucleon. Another nucleus B of $Z=12$ has total $26$ nucleons and $1.8$ MeV binding energy per nucleons. The difference of binding energy of B and A will be _________ MeV.

Accepted Answer

6

Question 60

For electron gain enthalpies of the elements denoted as $\Delta_{eg}H$, the incorrect option is:

Accepted Answer

(B) $\Delta_{eg}H(Se)<\Delta_{eg}H(S)$

Answer

(A) $\Delta_{eg}H(Te)<\Delta_{eg}H(Po)$

Answer

(C) $\Delta_{eg}H(Cl)<\Delta_{eg}H(F)$

Answer

(D) $\Delta_{eg}H(I)<\Delta_{eg}H(At)$

Question 61

All structures given below are of vitamin C. Most stable of them is:

Accepted Answer

(A) (1)

Answer

(B) (2)

Answer

(C) (3)

Answer

(D) (4)

Question 62

A straight line is given for Freundlich Adsorption ($y=3x+2.505$). The value of $\dfrac1n$ and $\log K$ are respectively.

Accepted Answer

(D) $3$ and $2.505$

Answer

(A) $0.3$ and $0.7033$

Answer

(B) $0.3$ and $\log 2.505$

Answer

(C) $3$ and $0.7033$

Question 63

The correct order of bond enthalpy (kJmol$^{-1}$) is:

Accepted Answer

(B) $C-C>Si-Si>Ge-Ge>Sn-Sn$

Answer

(A) $C-C>Si-Si>Sn-Sn>Ge-Ge$

Answer

(C) $Si-Si>C-C>Sn-Sn>Ge-Ge$

Answer

(D) $Si-Si>C-C>Ge-Ge>Sn-Sn$

Question 64

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): An aqueous solution of KOH when used for volumetric analysis, its concentration should be checked before the use.
Reason (R): On aging, KOH solution absorbs atmospheric $CO_2$.
In the light of the above statements, choose the correct answer from the options given below:

Accepted Answer

(C) Both (A) and (R) are correct and (R) is the correct explanation of (A)

Answer

(A) Both (A) and (R) are correct but (R) is not the correct explanation of (A)

Answer

(B) (A) is correct but (R) is not correct

Answer

(D) (A) is not correct but (R) is correct

JEE Main 1 February 2023 Shift 2 Question Paper with Answers

Physics — JEE Main 1 February 2023 Shift 2

Chemistry — JEE Main 1 February 2023 Shift 2

Mathematics — JEE Main 1 February 2023 Shift 2

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