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Past papers
JEE Main 2022
29 Jul, Morning shift
Physics
25
Chemistry
21
Mathematics
29
Physics
Q59
If the potential barrier across a p-n junction is 0.6 ~V. Then the electric field intensity, in the depletion region having the width of 6 × 10⁻⁶ ~m, will be…
Electronic Devices
Q61
The X-Y plane be taken as the boundary between two transparent media M₁ and M₂. M₁ in Z 0 has a refractive index of √(2) and M₂ with Z<0 has a refractive…
Optics
Q62
If the acceleration due to gravity experienced by a point mass at a height h above the surface of earth is same as that of the acceleration due to gravity at…
Gravitation
Q63
One mole of a monoatomic gas is mixed with three moles of a diatomic gas. The molecular specific heat of mixture at constant volume is (α²)/4 R J / mol K…
Thermodynamics
Q64
The pressure P₁ and density d₁ of diatomic gas (γ=7/5) changes suddenly to P₂(>P₁) and d₂ respectively during an adiabatic process. The temperature of the gas…
Thermodynamics
Q65
A closely wounded circular coil of radius 5 cm produces a magnetic field of 37.68 × 10⁻⁴ ~T at its center. The current through the coil is _ _ _ _ A. [Given…
Magnetic Effects of Current and Magnetism
Q66
A wire of length 314 ~cm carrying current of 14 ~A is bent to form a circle. The magnetic moment of the coil is _ _ _ _ A -m². [Given π=3.14 ]
Magnetic Effects of Current and Magnetism
Q75
Two light beams of intensities 4I and 9I interfere on a screen. The phase difference between these beams on the screen at point A is zero and at point B is π…
Optics
Q5912
An alternating emf E=440 sin 100 π t is applied to a circuit containing an inductance of (√(2))/(π) H. If an a.c. ammeter is connected in the circuit, its…
Electromagnetic Induction and Alternating Currents
Q5952
A coil of inductance 1 H and resistance 100 Ω is connected to a battery of 6 V. Determine approximately: (a) The time elapsed before the current acquires half…
Electromagnetic Induction and Alternating Currents
Q6014
Find the ratio of energies of photons produced due to transition of an electron of hydrogen atom from its (i) second permitted energy level to the first…
Atoms and Nuclei
Q6201
Two bodies of mass 1 ~kg and 3 ~kg have position vectors i+2 j+k and -3 i-2 j+k respectively. The magnitude of position vector of centre of mass of this…
Rotational Motion
Q6367
Find the modulation index of an AM wave having 8 ~V variation where maximum amplitude of the AM wave is 9 ~V.
Communication Systems
Q6519
Two metallic wires of identical dimensions are connected in series. If σ₁ and σ₂ are the conductivities of the these wires respectively, the effective…
Current Electricity
Q6653
The kinetic energy of emitted electron is E when the light incident on the metal has wavelength λ. To double the kinetic energy, the incident light must have…
Dual Nature of Matter and Radiation
Q6841
Match List - I with List - II: List - I List - II (a) UV rays (i) Diagnostic tool in medicine (b) X-rays (ii) Water purification (c) Microwave (iii)…
Electromagnetic Waves
Q7020
Given below are two statements. Statement I: Electric potential is constant within and at the surface of each conductor. Statement II: Electric field just…
Electrostatics
Q7834
If t=√(x)+4, then ((d x)/(~d t)) t=4 is:
Kinematics
Q7867
A ball is thrown up vertically with a certain velocity so that, it reaches a maximum height h. Find the ratio of the times in which it is at height h/3 while…
Kinematics
Q7952
If the length of a wire is made double and radius is halved of its respective values. Then, the Young's modulus of the material of the wire will:
Properties of Solids and Liquids
Q8021
Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Clothes containing oil or grease…
Properties of Solids and Liquids
Q8211
The time period of oscillation of a simple pendulum of length L suspended from the roof of a vehicle, which moves without friction down an inclined plane of…
Oscillations and Waves
Q8263
Given below are two statements: One is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (A): Time period of oscillation of a liquid…
Units and Measurements
Q8359
A travelling microscope has 20 divisions per cm on the main scale while its vernier scale has total 50 divisions and 25 vernier scale divisions are equal to…
Experimental Skills
Q8589
A ball is projected with kinetic energy E, at an angle of 60^(°) to the horizontal. The kinetic energy of this ball at the highest point of its flight will…
Work, Energy and Power
Chemistry
Q1
In a linear tetrapeptide (Constituted with different amino acids), (number of amino acids) - (number of peptide bonds) is _ _ _ _.
Biomolecules
Q4
The reaction between X and Y is first order with respect to X and zero order with respect to Y. Experiment | ([X])/(mol L⁻¹) | ([Y])/(mol L⁻¹) | (Initial…
Chemical Kinetics
Q5
[Fe(CN)₆]³⁻ should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization energy for this complex is (-) _ _ _ _ _…
Coordination Compounds
Q9
Resistance of a conductivity cell (cell constant 129 ~m⁻¹) filled with 74.5 ppm solution of KCl is 100 Ω (labelled as solution 1). When the same cell is…
Redox Reactions and Electrochemistry
Q11
If the solubility product of PbS is 8 × 10⁻²8, then the solubility of PbS in pure water at 298 K is x × 10⁻¹6 mol L⁻¹. The value of x is _ _ _ _ _. (Nearest…
Equilibrium
Q14
In bromination of Propyne, with Bromine, 1, 1, 2, 2-tetrabromopropane is obtained in 27% yield. The amount of 1, 1, 2, 2-tetrabromopropane obtained from 1 g…
Principles Related to Practical Chemistry
Q16
Ionic radii of cation A⁺ and anion B⁻ are 102 and 181 pm respectively. These ions are allowed to crystallize into an ionic solid. This crystal has cubic close…
Solid State
Q17
If O₂ gas is bubbled through water at 303 ~K, the number of millimoles of O₂ gas that dissolve in 1 litre of water is _ _ _ _ _. (Nearest Integer) (Given…
Solutions
Q19
The minimum uncertainty in the speed of an electron in an one dimensional region of length 2 a o (Where a o = Bohr radius 52.9 pm) is _ _ _ _ k m s⁻¹. (Given…
Atomic Structure
Q21
When 600 mL of 0.2 M HNO₃ is mixed with 400 ~mL of 0.1 M NaOH solution in a flask, the rise in temperature of the flask is _ _ _ _ _ _ × 10⁻² ^(°) C…
Chemical Thermodynamics
Q313
Which of the following pair of molecules contain odd electron molecule and an expanded octet molecule?
Chemical Bonding and Molecular Structure
Q314
Number of lone pairs of electrons in the central atom of SCl₂, O₃, ClF₃ and SF₆, respectively, are:
Chemical Bonding and Molecular Structure
Q779
In neutral or faintly alkaline medium, KMnO₄ being a powerful oxidant can oxidize, thiosulphate almost quantitatively, to sulphate. In this reaction overall…
d- and f-Block Elements
Q888
The reaction of zinc with excess of aqueous alkali, evolves hydrogen gas and gives:
d- and f-Block Elements
Q889
In following pairs, the one in which both transition metal ions are colourless is:
d- and f-Block Elements
Q1077
Which among the following pairs has only herbicides?
Environmental Chemistry
Q1427
In metallurgy the term "gangue" is used for:
Isolation of Elements
Q1615
The first ionization enthalpy of Na, Mg and Si, respectively, are: 496, 737 and 786 ~kJ ~mol⁻¹. The first ionization enthalpy (kJ mol⁻¹) of Al is:
Classification of Elements and Periodicity in Properties
Q1833
Lithium nitrate and sodium nitrate, when heated separately, respectively, give:
S Block Elements
Q2102
N 2(~g) +3 H 2(~g) 2 NH 3(~g) 20 ~g ~~~5 ~g Consider the above reaction, the limiting reagent of the reaction and number of moles of NH₃ formed respectively…
Some Basic Concepts in Chemistry
Q2276
100 ~mL of 5% (w / v) solution of NaCl in water was prepared in 250 ~mL beaker. Albumin from the egg was poured into NaCl solution and stirred well. This…
Surface Chemistry
Mathematics
Q23
Let a line with direction ratios a,-4 a,-7 be perpendicular to the lines with direction ratios 3,-1,2 b and b, a,-2. If the point of intersection of the line…
Three Dimensional Geometry
Q26
Let the ratio of the fifth term from the beginning to the fifth term from the end in the binomial expansion of (4√(2)+1/(4√(3)))ⁿ, in the increasing powers of…
Binomial Theorem and Its Simple Applications
Q27
Let the mirror image of a circle c₁: x²+y²-2 x-6 y+α=0 in line y=x+1 be c₂: 5 x²+5 y²+10 g x+10 f y+38=0. If r is the radius of circle c₂, then α+6 r² is…
Coordinate Geometry
Q37
Let p and p + 2 be prime numbers and let Δ=| ccc p ! (p+1) ! (p+2) ! (p+1) ! (p+2) ! (p+3) ! (p+2) ! (p+3) ! (p+4) ! | Then the sum of the maximum values of α…
Matrices and Determinants
Q40
The number of matrices of order 3 × 3, whose entries are either 0 or 1 and the sum of all the entries is a prime number, is _ _ _ _ _.
Permutations and Combinations
Q43
Let a₁, a₂, a₃, be an A.P. If Σ r=1 ^(∞) (a r)/(2^(r))=4, then 4 a₂ is equal to _ _ _ _ _.
Sequence and Series
Q44
If 1/(2 × 3 × 4)+1/(3 × 4 × 5)+1/(4 × 5 × 6)+ +1/(100 × 101 × 102)=k/101, then 34 k is equal to _ _ _ _ _.
Sequence and Series
Q46
Let S=\4,6,9 and T=\9,10,11,, 1000. If A= ₁+a₂+ +a k: k N, a₁, a₂, a₃,, a k. ε S, then the sum of all the elements in the set T-A is equal to _ _ _ _ _.
Sets, Relations and Functions
Q47
Let the mean and the variance of 20 observations x₁, x₂,, x₂₀ be 15 and 9, respectively. For α R, if the mean of (x₁+α)²,(x₂+α)²,,(x₂₀+α)² is 178, then the…
Statistics and Probability
Q2452
If the foot of the perpendicular from the point A(-1,4,3) on the plane P: 2 x+m y+n z=4, is (-2, 7/2, 3/2), then the distance of the point A from the plane P…
Three Dimensional Geometry
Q2672
Let f(x)=3^(x²-2)³+4, x R. Then which of the following statements are true? P: x=0 is a point of local minima of f Q: x=√(2) is a point of inflection of f R…
Limit, Continuity and Differentiability
Q2851
The area of the region \(x, y):|x-1| ≤ y ≤ √(5-x²) is equal to:
Integral Calculus
Q3226
If z=2+3 i, then z⁵+(z)⁵ is equal to:
Complex Numbers and Quadratic Equations
Q3445
The integral ∫₀^((π)/2) 1/(3+2 sin x+ cos x) ~d x is equal to:
Integral Calculus
Q3446
If f(α)=∫₁^(α) (log ₁₀ t)/(1+t) dt, α>0, then f(e³)+f(e⁻³) is equal to:
Integral Calculus
Q3551
Let the solution curve y=y(x) of the differential equation (1+e²ˣ)((d y)/(~d x)+y)=1 pass through the point (0, (π)/2). Then, lim x → ∞ eˣ y(x) is equal to:
Differential Equations
Q3764
Let a line L pass through the point of intersection of the lines b x+10 y-8=0 and 2 x-3 y=0, ~b R-\4/3. If the line L also passes through the point (1,1) and…
Coordinate Geometry
Q3934
The angle of elevation of the top of a tower from a point A due north of it is α and from a point B at a distance of 9 units due west of A is cos…
Height and Distance
Q4210
The number of points, where the function f: R → R, f(x)=|x-1| cos |x-2| sin |x-1|+(x-3)|x²-5 x+4|, is NOT differentiable, is:
Limit, Continuity and Differentiability
Q4295
If lim x → 0 (α eˣ+β e⁻ˣ+γ sin x)/(x sin ² x)=2/3, where α, β, γ R, then which of the following is NOT correct?
Limit, Continuity and Differentiability
Q4376
The statement (p q) ⇒(p r) is equivalent to:
Mathematical Reasoning
Q4614
Let A and B be two 3 × 3 non-zero real matrices such that AB is a zero matrix. Then
Matrices and Determinants
Q4673
Let the focal chord of the parabola P: y²=4 x along the line L: y=m x+c, m>0 meet the parabola at the points M and N. Let the line L be a tangent to the…
Coordinate Geometry
Q5023
Let S=\1,2,3,, 2022. Then the probability, that a randomly chosen number n from the set S such that HCF (n, 2022)=1, is:
Statistics and Probability
Q5159
If 1/((20-a)(40-a))+1/((40-a)(60-a))+ +1/((180-a)(200-a))=1/256, then the maximum value of a is:
Complex Numbers and Quadratic Equations
Q5362
Let R be a relation from the set \1,2,3,, 60 to itself such that R=\(a, b): b=p q, where p, q 3 are prime numbers. Then, the number of elements in R is:
Sets, Relations and Functions
Q5541
Let the circumcentre of a triangle with vertices A(a, 3), B(b, 5) and C(a, b), ab > 0 be P(1,1). If the line AP intersects the line BC at the point Q (k₁…
Coordinate Geometry
Q5740
Let a=3 i+j and b=i+2 j+k. Let c be a vector satisfying a ×(b × c)=b+λ c. If b and c are non-parallel, then the value of λ is:
Vector Algebra
Q5829
Let a and b be two unit vectors such that the angle between them is (π)/4. If θ is the angle between the vectors (a+b) and (a+2 b+2(a × b)), then the value of…
Vector Algebra