JEE Main 24 January 2023 Shift 2 Question Paper with Answers
24 January 2023 · January session · 90 questions
The complete JEE Main 24 January 2023 Shift 2 paper — all 90 questions with the correct answer for each, tagged to the chapter it tests. Free to read, no account needed.
Physics
30
Chemistry
30
Mathematics
30
Physics — JEE Main 24 January 2023 Shift 2
Q1·PhysicsSingle correct
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: A pendulum clock when taken to Mount Everest becomes fast.
Reason R: The value of g (acceleration due to gravity) is less at Mount Everest than on the surface of earth.
In the light of the above statements, choose the most appropriate answer from the options given below
(A)Both A and R are correct and R is the correct explanation of A
(B)A is correct but R is not correct
(C)Both A and R are correct but R is NOT the correct explanation of A
(D)A is not correct but R is correct
Q2·PhysicsSingle correct
The frequency (ν) of an oscillating liquid drop may depend upon radius (r) of the drop, density (ρ) of liquid and the surface tension (s) of the liquid as: ν=raρbsc. The values of a, b and c respectively are
(A)(−23,21,21)
(B)(23,−21,21)
(C)(−23,−21,21)
(D)(23,21,−21)
Q3·PhysicsSingle correct
Given below are two statements:
Statement I: Acceleration due to earth's gravity decreases as you go 'up' or 'down' from earth's surface.
Statement II: Acceleration due to earth's gravity is same at a height h and depth d from earth's surface, if h=d. In the light of above statements, choose the most appropriate answer from the options given below
(A)Both Statement I and Statement II are incorrect
(B)Statement I is incorrect but statement II is correct
(C)Both Statement I and Statement II are correct
(D)Statement I is correct but statement II is incorrect
A long solenoid is formed by winding 70 turns cm−1. If 2.0 A current flows, then the magnetic field produced inside the solenoid is _________ (μ0=4π×10−7TmA−1)
The electric potential at the centre of two concentric half rings of radii R1 and R2, having same linear charge density λ is:
(A)2ε0λ
(B)4ε0λ
(C)ε02λ
(D)ε0λ
Q6·PhysicsSingle correct
If the distance of the earth from Sun is 1.5×106 km, then the distance of an imaginary planet from Sun, if its period of revolution is 2.83 years is:
(A)6×106 km
(B)3×106 km
(C)3×107 km
(D)6×107 km
Q7·PhysicsSingle correct
A photon is emitted in transition from n=4 to n=1 level in hydrogen atom. The corresponding wavelength for this transition is (given, h=4×10−15 eVs):
(A)99.3 nm
(B)941 nm
(C)974 nm
(D)94.1 nm
Q8·PhysicsSingle correct
A cell of emf 90 V is connected across series combination of two resistors each of 100Ω resistance. A voltmeter of resistance 400Ω is used to measure the potential difference across each resistor. The reading of the voltmeter will be:
(A)90 V
(B)45 V
(C)80 V
(D)40 V
Q9·PhysicsSingle correct
If two vectors P=i^+2mj^+mk^ and Q=4i^−2j^+mk^ are perpendicular to each other, then the value of m will be:
(A)−1
(B)3
(C)2
(D)1
Q10·PhysicsSingle correct
The electric field and magnetic field components of an electromagnetic wave going through vacuum is described by Ex=E0sin(kz−ωt) and By=B0sin(kz−ωt). Then the correct relation between E0 and B0 is given by
(A)E0B0=ωk
(B)E0B0=kω
(C)kE0=ωB0
(D)ωE0=kB0
Q11·PhysicsSingle correct
The logic gate equivalent to the given circuit diagram is:
(A)NAND
(B)OR
(C)AND
(D)NOR
Q12·PhysicsSingle correct
Let γ1 be the ratio of molar specific heat at constant pressure and molar specific heat at constant volume of a monoatomic gas and γ2 be the similar ratio of diatomic gas. Considering the diatomic gas molecule as a rigid rotator, the ratio γ2γ1 is:
When a beam of white light is allowed to pass through convex lens parallel to principal axis, the different colours of light converge at different point on the principle axis after refraction. This is called:
A metallic rod of length 'L' is rotated with an angular speed of 'ω' normal to a uniform magnetic field 'B' about an axis passing through one end of rod as shown in figure. The induced emf will be:
(A)41BL2ω
(B)21B2L2ω
(C)41B2Lω
(D)21BL2ω
Q15·PhysicsSingle correct
An α-particle, a proton and an electron have the same kinetic energy. Which one of the following is correct in case of their de-Broglie wavelength:
(A)λα<λp<λe
(B)λα=λp=λe
(C)λα>λp>λe
(D)λα>λp<λe
Q16·PhysicsSingle correct
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Steel is used in the construction of buildings and bridges.
Reason R: Steel is most elastic and its elastic limit is high. In the light of above statements, choose the most appropriate answer from the options given below
(A)Both A and R are correct and R is the correct explanation of A
(B)Both A and R are correct but R is NOT the correct explanation of A
(C)A is correct but R is not correct
(D)A is not correct but R is correct
Q17·PhysicsSingle correct
In an Isothermal change, the change in pressure and volume of a gas can be represented for three different temperature; T3>T2>T1 as:
(A)(1)
(B)(2)
(C)(3)
(D)(4)
Q18·PhysicsSingle correct
Match List I (broadcast / communication service) with List II (frequency band). Choose the correct answer from the options given below:
List I
List II
A.AM Broadcast
I.88–108 MHz
B.FM Broadcast
II.540–1600 kHz
C.Television
III.3.7–4.2 GHz
D.Satellite Communication
IV.54 MHz–890 MHz
(A)A-II, B-I, C-IV, D-III
(B)A-I, B-III, C-II, D-IV
(C)A-IV, B-III, C-I, D-II
(D)A-III, B-III, C-I, D-IV
Q19·PhysicsSingle correct
A body of mass 200 g is tied to a spring of spring constant 12.5 N/m, while the other end of spring is fixed at point O. If the body moves about O in a circular path on a smooth horizontal surface with constant angular speed 5 rad/s, then the ratio of extension in the spring to its natural length will be:
(A)2:5
(B)1:1
(C)2:3
(D)1:2
Q20·PhysicsSingle correct
The velocity time graph of a body moving in a straight line is shown in figure. The ratio of displacement to distance travelled by the body in time 0 to 10 s is:
(A)1:1
(B)1:2
(C)1:3
(D)1:4
Q21·PhysicsNumerical
A body of mass 1 kg begins to move under the action of a time dependent force F=(ti^+3t2j^) N, where i^ and j^ are the unit vectors along x and y axis. The power developed by above force, at the time t=2 s, will be _________ W.
A convex lens of refractive index 1.5 and focal length 18 cm in air is immersed in water. The change in focal length of the lens will be _________ cm. (Given refractive index of water =34)
Q23·PhysicsNumerical
The energy released per fission of nucleus of 240X is 200 MeV. The energy released if all the atoms in 120 g of pure 240X undergo fission is _________ ×1025 MeV (Given NA=6×1023)
Q24·PhysicsNumerical
A uniform solid cylinder with radius R and length L has moment of inertia I1 about the axis of the cylinder. A concentric solid cylinder of radius R′=2R and length L′=2L is carved out of the original cylinder. If I2 is the moment of inertia of the carved out portion of the cylinder then I2I1= _________ (Both I1 and I2 are about the axis of the cylinder)
A parallel plate capacitor with air between the plate has a capacitance of 15 pF. The separation between the plate becomes twice and the space between them is filled with a medium of dielectric constant 3.5. Then the capacitance becomes 4x pF. The value of x is _________
A single turn current loop in the shape of a right angle triangle with sides 5 cm, 12 cm, 13 cm is carrying a current of 2 A. The loop is in a uniform magnetic field of magnitude 0.75 T whose direction is parallel to the current in the 13 cm side of the loop. The magnitude of the magnetic force on the 5 cm side will be 130x N. The value of x is _________
A mass m attached to free end of a spring executes SHM with a period of 1 s. If the mass is increased by 3 kg the period of oscillation increases by one second, the value of mass m is _________ kg.
Q28·PhysicsNumerical
If a copper wire is stretched to increase its length by 20%, the percentage increase in resistance of the wire is _________ %
Three identical resistors with resistance R=12Ω and two identical inductors with self inductance L=5 mH are connected to an ideal battery with emf of 12 V as shown in figure. The current through the battery long after the switch has been closed will be _________ A.
Q30·PhysicsNumerical
A spherical ball of radius 1 mm and density 10.5 g/cc is dropped in glycerine of coefficient of viscosity 9.8 poise and density 1.5 g/cc. Viscous force on the ball when it attains constant velocity is 3696×10−x N. The value of x is _________ (Given, g=9.8 m/s2 and π=722)
Chemistry — JEE Main 24 January 2023 Shift 2
Q31·ChemistrySingle correct
Identify the correct statements about alkali metals. A. The order of standard reduction potential (M+∣M) for alkali metal ions is Na>Rb>Li. B. CsI is highly soluble in water. C. Lithium carbonate is highly stable to heat. D. Potassium dissolved in concentrated liquid ammonia is blue in colour and paramagnetic. E. All the alkali metal hydrides are ionic solids. Choose the correct answer from the options given below:
(A)C and E only
(B)A, B and E only
(C)A, B, D only
(D)A and E only
Q32·ChemistrySingle correct
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Beryllium has less negative value of reduction potential compared to the other alkaline earth metals.
Reason R: Beryllium has large hydration energy due to small size of Be2+ but relatively large value of atomization enthalpy.
In the light of the above statements, choose the most appropriate answer from the options given below
(A)A is not correct but R is correct
(B)A is correct but R is not correct
(C)Both A and R are correct and R is the correct explanation of A
(D)Both A and R are correct but R is NOT the correct explanation of A
Q33·ChemistrySingle correct
A student has studied the decomposition of a gas AB3 at 25∘C. He obtained the following data. p (mmHg): 50, 100, 200, 400; relative t1/2 (s): 4, 2, 1, 0.5. The order of the reaction is
(A)0 (zero)
(B)0.5
(C)1
(D)2
Q34·ChemistrySingle correct
K2Cr2O7 paper acidified with dilute H2SO4 turns green when exposed to
Given below are two statements:
Statement I: The given compound under Clemmensen reduction conditions will give the indicated product.
Statement II: The given compound under Wolff-Kishner reduction condition will give the indicated product.
In the light of the above statements, choose the correct answer from the options given below:
(A)Statement I is false but Statement II is true
(B)Statement I is true but Statement II is false
(C)Both Statement I and Statement II are true
(D)Both Statement I and Statement II are false
Q38·ChemistrySingle correct
Which of the following cannot be explained by crystal field theory?
(A)The order of spectrochemical series
(B)Stability of metal complexes
(C)Magnetic properties of transition metal complexes
(D)Colour of metal complexes
Q39·ChemistrySingle correct
The number of s-electrons present in an ion with 55 protons in its unipositive state is
(A)8
(B)10
(C)9
(D)12
Q40·ChemistrySingle correct
Which one amongst the following are good oxidizing agents? (A) Sm2+ (B) Ce2+ (C) Ce4+ (D) Tb4+. Choose the most appropriate answer from the options given below:
(A)D only
(B)C only
(C)C and D only
(D)A and B only
Q41·ChemistrySingle correct
Choose the correct representation of conductometric titration of benzoic acid vs sodium hydroxide.
(A)(1)
(B)(2)
(C)(3)
(D)(4)
Q42·ChemistrySingle correct
Match List I (type of drug) with List II (example medicine). Choose the correct answer from the options given below:
List I
List II
A.Antifertility drug
I.Norethindrone
B.Tranquilizer
II.Meprobomate
C.Antihistamine
III.Seldane
D.Antibiotic
IV.Ampicillin
(A)A-I, B-III, C-II, D-IV
(B)A-IV, B-III, C-II, D-I
(C)A-I, B-II, C-III, D-IV
(D)A-II, B-I, C-III, D-IV
Q43·ChemistrySingle correct
Find out the major products from the following reaction
(A)(1)
(B)(2)
(C)(3)
(D)(4)
Q44·ChemistrySingle correct
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Benzene is more stable than hypothetical cyclohexatriene.
Reason R: The delocalized π electron cloud is attracted more strongly by nuclei of carbon atoms.
In the light of the above statements, choose the correct answer from the options given below:
(A)Both A and R are correct and R is the correct explanation of A
(B)Both A and R are correct but R is NOT the correct explanation of A
(C)A is false but R is true
(D)A is true but R is false
Q45·ChemistrySingle correct
In which of the following reactions the hydrogen peroxide acts as a reducing agent?
Given below are two statements:
Statement I: Pure Aniline and other arylamines are usually colourless.
Statement II: Arylamines get coloured on storage due to atmospheric reduction.
In the light of the above statements, choose the most appropriate answer from the options given below:
(A)Both Statement I and Statement II are incorrect
(B)Statement I is incorrect but Statement II is correct
(C)Statement I is correct but Statement II is incorrect
(D)Both Statement I and Statement II are correct
Q47·ChemistrySingle correct
Correct statement is:
(A)An average human being consumes nearly 15 times more air than food
(B)An average human being consumes 100 times more air than food
(C)An average human being consumes equal amount of food and air
(D)An average human being consumes more food than air
Q48·ChemistrySingle correct
What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species: N2; N2+; O2; O2+?
(A)2,1,0,1
(B)0,1,2,1
(C)0,1,0,1
(D)2,1,2,1
Q49·ChemistrySingle correct
The metal which is extracted by oxidation and subsequent reduction from its ore is:
(A)Ag
(B)Fe
(C)Cu
(D)Al
Q50·ChemistrySingle correct
Choose the correct colour of the product for the following reaction.
(A)White
(B)Red
(C)Blue
(D)Yellow
Q51·ChemistryNumerical
Following figure shows spectrum of an ideal black body at four different temperatures. The number of correct statement/s from the following is _________. A. T4>T3>T2>T1. B. The black body consists of particles performing simple harmonic motion. C. The peak of the spectrum shifts to shorter wavelength as temperature increases. D. ν1T1=ν2T2=ν3T3= constant. E. The spectrum could be explained using quantisation of energy.
Q52·ChemistryNumerical
Number of units, which are used to express concentration of solutions from the following is _________. Mass percentage, Mole, Mole fraction, Molarity, ppm, Molality
Q53·ChemistryNumerical
The number of statement/s which are the characteristics of physisorption is _________. A. It is highly specific in nature. B. Enthalpy of adsorption is high. C. It decreases with increase in temperature. D. It results into unimolecular layer. E. No activation energy is needed
Q54·ChemistryNumerical
Sum of π-bonds present in peroxodisulphuric acid and pyrosulphuric acid is:
Q55·ChemistryNumerical
If the pKa of lactic acid is 5, then the pH of 0.005 M calcium lactate solution at 25∘C is _________ ×10−1 (Nearest integer)
Q56·ChemistryNumerical
The total pressure observed by mixing two liquids A and B is 350 mmHg when their mole fractions are 0.7 and 0.3 respectively. The total pressure become 410 mmHg if the mole fractions are changed to 0.2 and 0.8 respectively for A and B. The vapour pressure of pure A is _________ mmHg. (Nearest integer) Consider the liquids and solutions behave ideally.
Q57·ChemistryNumerical
The number of statement/s, which are correct with respect to the compression of carbon dioxide from point (a) in the Andrews isotherm from the following is _________. A. Carbon dioxide remains as a gas upto point (b). B. Liquid carbon dioxide appears at point (c). C. Liquid and gaseous carbon dioxide coexist between points (b) and (c). D. As the volume decreases from (b) to (c), the amount of liquid decreases
Q58·ChemistryNumerical
Maximum number of isomeric monochloro derivatives which can be obtained from 2,2,5,5-tetramethylhexane by chlorination is _________
Q59·ChemistryNumerical
Total number of tripeptides possible by mixing of valine and proline is _________
Q60·ChemistryNumerical
One mole of an ideal monoatomic gas is subjected to changes as shown in the graph. The magnitude of the work done (by the system or on the system) is _________ J (nearest integer)
If the system of equations x+2y+3z=3, 4x+3y−4z=4, 8x+4y+λz=9+μ has infinitely many solutions, then the ordered pair (λ,μ) is equal to:
(A)(−572,521)
(B)(−572,−521)
(C)(572,−521)
(D)(572,521)
Q63·MathematicsSingle correct
If f(x)=22x+222x,x∈R, then f(20231)+f(20232)+⋯+f(20232022) is equal to
(A)1011
(B)2010
(C)1010
(D)2011
Q64·MathematicsSingle correct
Let α=4i^+3j^+5k^ and β=i^+2j^−4k^. Let β1 be parallel to α and β2 be perpendicular to α. If β=β1+β2, then the value of 5β2⋅(i^+j^+k^) is
(A)7
(B)9
(C)6
(D)11
Q65·MathematicsSingle correct
Let y=y(x) be the solution of the differential equation (x2−3y2)dx+3xydy=0,y(1)=1. Then 6y2(e) is equal to
(A)2e2
(B)3e2
(C)e2
(D)23e2
Q66·MathematicsSingle correct
The locus of the mid points of the chords of the circle C1:(x−4)2+(y−5)2=4 which subtend an angle θi at the centre of the circle C1, is a circle of radius ri. If θ1=3π,θ3=32π and r12=r22+r32, then θ2 is equal to
(A)4π
(B)2π
(C)6π
(D)43π
Q67·MathematicsSingle correct
The number of real solutions of the equation 3(x2+x21)−2(x+x1)+5=0, is
(A)0
(B)3
(C)4
(D)2
Q68·MathematicsSingle correct
Let A be a 3×3 matrix such that ∣adj(adj(adjA))∣=124. Then ∣A−1adjA∣ is equal to
(A)6
(B)23
(C)12
(D)1
Q69·MathematicsSingle correct
∫4324339−4x248dx is equal to
(A)2π
(B)6π
(C)3π
(D)2π
Q70·MathematicsSingle correct
The number of square matrices of order 5 with entries from the set {0,1}, such that the sum of all the elements in each row is 1 and the sum of all the elements in each column is also 1, is
(A)125
(B)225
(C)150
(D)120
Q71·MathematicsSingle correct
If (30C1)2+2(30C2)2+3(30C3)2+⋯+30(30C30)2=(30!)2α60! then α is equal to:
(A)30
(B)10
(C)60
(D)15
Q72·MathematicsSingle correct
Let the plane containing the line of intersection of the planes P1:x+(λ+4)y+z=1 and P2:2x+y+z=2 pass through the points (0,1,0) and (1,0,1). Then the distance of the point (2λ,λ,−λ) from the plane P2 is
(A)46
(B)36
(C)56
(D)26
Q73·MathematicsSingle correct
Let f(x) be a function such that f(x+y)=f(x)⋅f(y) for all x,y∈N. If f(1)=3 and ∑k=1nf(k)=3279, then the value of n is
(A)9
(B)6
(C)8
(D)7
Q74·MathematicsSingle correct
Let the six numbers a1,a2,a3,a4,a5,a6 be in A.P. and a1+a3=10. If the mean of these six numbers is 219 and their variance is σ2, then 8σ2 is equal to:
(A)210
(B)220
(C)200
(D)105
Q75·MathematicsSingle correct
The equations of the sides AB and AC of a triangle ABC are (λ+1)x+λy=4 and λx+(1−λ)y+λ=0 respectively. Its vertex A is on the y-axis and its orthocentre is (1,2). The length of the tangent from the point C to the part of the parabola y2=6x in the first quadrant is:
(A)4
(B)2
(C)6
(D)22
Q76·MathematicsSingle correct
Let p and q be two statements. Then ∼(p∧(p⇒∼q)) is equivalent to
The set of all values of a for which limx→a([x−5]−[2x+2])=0, where [α] denotes the greatest integer less than or equal to α, is equal to
(A)[−7.5,−6.5)
(B)[−7.5,−6.5]
(C)(−7.5,−6.5]
(D)(−7.5,−6.5)
Q78·MathematicsSingle correct
If the foot of the perpendicular drawn from (1,9,7) to the line passing through the point (3,2,1) and parallel to the planes x+2y+z=0 and 3y−z=3 is (α,β,γ), then α+β+γ is equal to
(A)3
(B)1
(C)−1
(D)5
Q79·MathematicsSingle correct
The number of integers, greater than 7000 that can be formed, using the digits 3,5,6,7,8 without repetition, is
(A)168
(B)220
(C)120
(D)48
Q80·MathematicsSingle correct
The value of (1+sin92π−icos92π1+sin92π+icos92π)3 is
(A)−21(3−i)
(B)−21(1−i3)
(C)21(1−i3)
(D)21(3+i)
Q81·MathematicsNumerical
If the shortest distance between the lines 2x+6=3y−6=4z−6 and 3x−λ=4y−26=5z+26 is 6, then the square of sum of all possible values of λ is
Q82·MathematicsNumerical
Three urns A, B and C contain 4 red, 6 black; 5 red, 5 black; and λ red, 4 black balls respectively. One of the urns is selected at random and a ball is drawn. If the ball drawn is red and the probability that it is drawn from urn C is 0.4, then the square of the length of the side of the largest equilateral triangle, inscribed in the parabola y2=λx with one vertex at the vertex of the parabola, is
Q83·MathematicsNumerical
Let S={θ∈[0,2π):tan(πcosθ)+tan(πsinθ)=0}. Then ∑θ∈Ssin2(θ+4π) is equal to
Q84·MathematicsNumerical
If 1⋅3+2⋅5+3⋅7+⋯ up to n terms13+23+33+⋯ up to n terms=59, then the value of n is
Q85·MathematicsNumerical
Let the sum of the coefficients of the first three terms in the expansion of (x−x23)n,x=0,n∈N, be 376. Then the coefficient of x4 is
Q86·MathematicsNumerical
The equations of the sides AB, BC and CA of a triangle ABC are: 2x+y=0, x+py=21a(a=0) and x−y=3 respectively. Let P(2,a) be the centroid of △ABC. Then (BC)2 is equal to
Q87·MathematicsNumerical
Let a=i^+2j^+λk^,b=3i^−5j^−λk^,a⋅c=7,2b⋅c+43=0,a×c=b×c. Then ∣a⋅b∣ is equal to
Q88·MathematicsNumerical
The minimum number of elements that must be added to the relation R={(a,b),(b,c),(b,d)} on the set {a,b,c,d} so that it is an equivalence relation, is
Q89·MathematicsNumerical
If the area of the region bounded by the curves y2−2y=−x,x+y=0 is A, then 8A is equal to
Q90·MathematicsNumerical
Let f be a differentiable function defined on [0,2π] such that f(x)>0 and f(x)+∫0xf(t)1−(logef(t))2dt=e,∀x∈[0,2π]. Then (6logef(6π))2 is equal to
Chapters tested in this paper
Open any chapter to practise every past-year question on that topic across all papers, and see how often it has actually appeared.
Take the 24 January 2023 Shift 2 paper as a timed mock and Jarvis marks it, then tells you which errors were conceptual gaps, which were silly mistakes, and which pattern you have now repeated. Step-by-step solutions for every question included.