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JEE Main 2021 16th March Morning Shift

Browse the complete Chemistry, Mathematics, and Physics question set from the JEE Main 2021 16th March Morning Shift paper, question by question. Each question shows a quick preview so you can jump straight to the topic or subject you want to revise. Click through to attempt the full question in practice mode, or head back to the paper-wise list to download the entire shift as a PDF.

This paper has 90 questions in total - 33 easy (37%), 43 moderate (48%) and 14 tough (16%). That's a fairly typical mix for this exam. By subject: Chemistry 40% easy, 43% moderate, 17% tough; Physics 43% easy, 47% moderate, 10% tough; Mathematics 27% easy, 53% moderate, 20% tough.

Chemistry questions were spread across 23 chapters, with General Organic Chemistry (3), Amines (2), and Hydrogen (2) carrying the most weight. Mathematics questions were spread across 22 chapters, with Definite Integration (3), Matrices (3), and Three Dimensional Geometry (3) carrying the most weight. Physics questions were spread across 22 chapters, with Rotational Motion (4), Alternating Current (2), and Current Electricity (2) carrying the most weight.

Chemistry

  1. 1Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : Size of Bk 3 + ion is l16 Mar, 2021 (M)F-Block elements
  2. 2Which among the following pairs of Vitamins is stored in our body relatively for longer duration?16 Mar, 2021 (M)Vitamins
  3. 3Given below are two statements: Statement I : Both CaCl 2 . 6 H 2 O and MgCl 2 . 8 H 2 O undergo dehydration on heating. Statement II : BeO 16 Mar, 2021 (M)Properties of S-block elements
  4. 4The product P in the above reaction is :16 Mar, 2021 (M)Preparation and Properties of Carboxylic Acids
  5. 5Match List-I with List-II : List-I List-II Industrial process Application (a) Haber s process (i) HNO 3 synthesis (b) Ostwald s process (ii)16 Mar, 2021 (M)Nitrogen and Its Compounds
  6. 6Among the following, the aromatic compounds are : Choose the correct answer from the following options :16 Mar, 2021 (M)Conjugation and Aromaticity
  7. 7In the above chemical reaction, intermediate X and reagent/condition A are :16 Mar, 2021 (M)Preparation and Properties of Amines
  8. 8Given below are two statements : Statement I : The E value of Ce 4 + / Ce 3 + is + 1 . 74 V Statement II : Ce is more stable in Ce 4 + state16 Mar, 2021 (M)Cells and Electrode Potential, Nernst Equation
  9. 9The functions of antihistamine are :16 Mar, 2021 (M)Drugs and It's Classification
  10. 10Which of the following is Lindlar catalyst?16 Mar, 2021 (M)Properties of D-block elements
  11. 11The product A and B formed in above reactions are16 Mar, 2021 (M)Properties and Preparation of Alkenes
  12. 12Given below are two statements: Statement I : H 2 O 2 can act as both oxidising and reducing agent in basic medium. Statement II : In the hy16 Mar, 2021 (M)Preparation and Properties of Hydrogen Peroxide
  13. 13The type of pollution that gets increased during the daytime and in the presence of O 3 is :16 Mar, 2021 (M)Air Pollution
  14. 14Assertion A : Enol form of acetone CH 3 COCH 3 exists in 0 . 1 % quantity. However, the enol form of acetyl acetone CH 3 COCH 2 OCCH 3 exist16 Mar, 2021 (M)Isomerism of Organic Compounds
  15. 15Which of the following reaction DOES NOT involve Hoffmann Bromamide degradation ?16 Mar, 2021 (M)Preparation and Properties of Amines
  16. 16The process that involves the removal of sulphur from the ores is :16 Mar, 2021 (M)Concentration of the Ore
  17. 17Match List-I with List-II List-I List-II Name of oxo acid Oxidation state of P (a) Hypophosphorous acid (i) + 5 (b) Orthophosphoric acid (ii16 Mar, 2021 (M)Phosphorus and Its Compounds
  18. 18Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : The H - O - H bond angl16 Mar, 2021 (M)Hybridisation and VSEPR Theory
  19. 19In chromatography technique, the purification of a compound is independent of:16 Mar, 2021 (M)Purification of Organic Compounds
  20. 20A group 15 element, which is a metal and forms a hydride with strongest reducing power among group 15 hydrides. The element is :16 Mar, 2021 (M)Hydrides
  21. 21For the reaction A g B g at 495 K , r G = - 9 . 478 kJ mol - 1 If we start the reaction in a closed container at 495 K with 22 millimoles of16 Mar, 2021 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  22. 22Complete combustion of 750 g of an organic compound provides 420 g of CO 2 and 210 g of H 2 O . The percentage composition of carbon and hyd16 Mar, 2021 (M)Quantitative measures in chemical equations
  23. 232 MnO 4 - + bC 2 O 4 2 - + cH + xMn 2 + + yCO 2 + zH 2 O If the above equation is balanced with integer coefficients, the value of c is ____16 Mar, 2021 (M)Balancing of redox reactions
  24. 24AB 2 is 10 % dissociated in water to A 2 + and B - . The boiling point of 10 . 0 molal aqueous solution of AB 2 is-- C . (Round off to the N16 Mar, 2021 (M)Colligative Properties and Abnormal Molecular Masses
  25. 25The equivalents of ethylene diamine required to replace the neutral ligands from the coordination sphere of the trans-complex of CoCl 3 . 4 16 Mar, 2021 (M)Werner's theory and Valence Bond Theory
  26. 26A 6 . 50 molal solution of KOH aq . has a density of 1 . 89 g cm - 3 . The molarity of the solution is mol dm - 3 . (Round off to the Neares16 Mar, 2021 (M)Concentration terms
  27. 27When light of wavelength 248 nm falls on a metal of threshold energy 3 . 0 eV , the de-Broglie wavelength of emitted electrons is ________ A16 Mar, 2021 (M)Dual Behaviour of Matter and Heisenberg Uncertainty Principle
  28. 28Two salts A 2 X and MX have the same value of solubility product of 4 . 0 10 - 12 . The ratio of their molar solubilizes i.e. S A 2 X S ( MX16 Mar, 2021 (M)Solubility
  29. 29A certain element crystallises in a bcc lattice of unit cell edge length 27 A o . If the same element under the same conditions crystallises16 Mar, 2021 (M)Cubic system
  30. 30The decomposition of formic acid on gold surface follows first order kinetics. If the rate constant at 300 K is 1 . 0 10 - 3 s - 1 and the a16 Mar, 2021 (M)Rate law and rate constant

Mathematics

  1. 1The number of elements in the set x R : | x | - 3 x + 4 = 6 is equal to16 Mar, 2021 (M)Number of Solutions
  2. 2If for a 0 , the feet of perpendiculars from the points A a , - 2 a , 3 and B 0 , 4 , 5 on the plane l x + m y + n z = 0 are points C 0 , - 16 Mar, 2021 (M)Plane in Space
  3. 3Consider three observations a , b and c such that b = a + c . If the standard deviation of a + 2 , c + 2 is d , then which of the following 16 Mar, 2021 (M)Measures of Dispersion
  4. 4If for x 0 , 2 , log 10 sin x + log 10 cos x = - 1 and log 10 sin x + cos x = 1 2 log 10 n - 1 , n 0 , then the value of n is equal to :16 Mar, 2021 (M)Logarithm
  5. 5Let A = i - i - i i , i = - 1 . Then, the system of linear equations A 8 x y = 8 64 has :16 Mar, 2021 (M)Product of Matrices
  6. 6If the three normals drawn to the parabola, y 2 = 2 x pass through the point a , 0 , a 0 , then a must be greater than :16 Mar, 2021 (M)Normal to Parabola
  7. 7Let the position vectors of two points P and Q be 3 i ^ - j ^ + 2 k ^ and i ^ + 2 j ^ - 4 k ^ , respectively. Let R and S be two points such16 Mar, 2021 (M)Line in Space
  8. 8Let the functions f : R R and g : R R be defined as : f x = x + 2 , x 0 x 2 , x 0 and g x = x 3 , x 1 3 x - 2 , x 1 Then, the number of poin16 Mar, 2021 (M)Differentiability
  9. 9Which of the following Boolean expression is a tautology ?16 Mar, 2021 (M)Mathematical Reasoning
  10. 10Let a complex number z , z 1 , satisfy log 1 2 z + 11 z - 1 2 2 . Then, the largest value of z is equal to _________.16 Mar, 2021 (M)Algebra of complex numbers
  11. 11If n is the number of irrational terms in the expansion of 3 1 / 4 + 5 1 / 8 60 , then n - 1 is divisible by :16 Mar, 2021 (M)Terms of Binomial Expansion
  12. 12Let P be a plane l x + m y + n z = 0 containing the line, 1 - x 1 = y + 4 2 = z + 2 3 . If plane P divides the line segment A B joining poin16 Mar, 2021 (M)Line and Plane
  13. 13The range of a R for which the function f x = 4 a - 3 x + log e 5 + 2 a - 7 cot x 2 sin 2 x 2 , x 2 n , n N , has critical points, is :16 Mar, 2021 (M)Monotonicity
  14. 14A pack of cards has one card missing. Two cards are drawn randomly and are found to be spades. The probability that the missing card is not 16 Mar, 2021 (M)Baye's Theorem
  15. 15Let x denote greatest integer less than or equal to x . If for n N , 1 - x + x 3 n = j = 0 3 n a j x j , then j = 0 3 n 2 a 2 j + 4 j = 0 3 16 Mar, 2021 (M)Sum of Series
  16. 16If y = y x is the solution of the differential equation, d y d x + 2 y tan x = sin x , y 3 = 0 , then the maximum value of the function y x 16 Mar, 2021 (M)Linear Differential Equation
  17. 17The locus of the midpoints of the chord of the circle, x 2 + y 2 = 25 which is tangent to the hyperbola, x 2 9 - y 2 16 = 1 is :16 Mar, 2021 (M)Chord with given Middle Point
  18. 18The number of roots of the equation, 81 sin 2 x + 81 cos 2 x = 30 in the interval 0 , is equal to :16 Mar, 2021 (M)Solving Trigonometric Equation
  19. 19Let S k = r = 1 k tan - 1 6 r 2 2 r + 1 + 3 2 r + 1 , then lim k S k is equal to :16 Mar, 2021 (M)Infinite Series
  20. 20Consider an arithmetic series and a geometric series having four initial terms from the set 11 , 8 , 21 , 16 , 26 , 32 , 4 . If the last ter16 Mar, 2021 (M)Mixed Question on AP and GP
  21. 21Let f : 0 , 2 R be defined as f x = log 2 1 + tan x 4 . Then, lim n 2 n f 1 n + f 2 n + . + f 1 is equal to ________.16 Mar, 2021 (M)Definite as Limit of Sum
  22. 22Let A B C D be a square of side of unit length. Let a circle C 1 centered at A with unit radius is drawn. Another circle C 2 which touches C16 Mar, 2021 (M)Tangent to circle
  23. 23If lim x 0 a e x - b cos x + c e - x x sin x = 2 , then a + b + c is equal to ________.16 Mar, 2021 (M)Miscellaneous
  24. 24Let P = - 30 20 56 90 140 112 120 60 14 and A = 2 7 2 - 1 - 1 0 - - + 1 where = - 1 + i 3 2 , and I 3 be the identity matrix of order 3 . If16 Mar, 2021 (M)Inverse of a Matrix
  25. 25If the normal to the curve y x = 0 x 2 t 2 - 15 t + 10 d t at a point a , b is parallel to the line x + 3 y = - 5 , a 1 , then the value of 16 Mar, 2021 (M)Leibnitz Rule of Differentiation
  26. 26Let the curve y = y x be the solution of the differential equation, d y d x = 2 x + 1 . If the numerical value of area bounded by the curve 16 Mar, 2021 (M)Area of Curve along axis
  27. 27Let f : R R be a continuous function such that f x + f x + 1 = 2 for all x R . If I 1 = 0 8 f x d x and I 2 = - 1 3 f x d x , then the value16 Mar, 2021 (M)Properties of Periodic Functions
  28. 28Let z and w be two complex numbers such that w = z z - 2 z + 2 , z + i z - 3 i = 1 and Re w has minimum value. Then, the minimum value of n 16 Mar, 2021 (M)Geometry of Complex Number
  29. 29The total number of 3 3 matrices A having enteries from the set 0 , 1 , 2 , 3 such that the sum of all the diagonal entries of A A T is 9 , 16 Mar, 2021 (M)Formation and Basic of Matrix
  30. 30Let a vector i ^ + j ^ be obtained by rotating the vector 3 i ^ + j ^ by an angle 45 about the origin in counterclockwise direction in the f16 Mar, 2021 (M)Product of 2 vectors

Physics

  1. 1One main scale division of a vernier callipers is a cm and n th division of the vernier scale coincide with n - 1 th division of the main sc16 Mar, 2021 (M)Experimental Physics
  2. 2For changing the capacitance of a given paralle plate capacitor, a dielectric material of dielectric constant K is used, which has the same 16 Mar, 2021 (M)Capacitors with Dielectric
  3. 3A block of mass m slides along a floor while a force of magnitude F is applied to it at an angle as shown in figure. The coefficient of kine16 Mar, 2021 (M)Frictional force
  4. 4The pressure acting on a submarine is 3 10 5 Pa at a certain depth. If the depth is doubled, the percentage increase in the pressure acting 16 Mar, 2021 (M)Pressure and thrust
  5. 5The angle of deviation through a prism is minimum when (A) Incident ray and emergent ray are symmetric to the prism (B) The refracted ray in16 Mar, 2021 (M)Prism and Dispersion of Light
  6. 6A plane electromagnetic wave of frequency 500 MHz is traveling in a vacuum along the y - direction. At a particular point in space and time,16 Mar, 2021 (M)Electromagnetic Waves and Maxwell's equations
  7. 7The maximum and minimum distances of a comet from the Sun are 1 . 6 10 12 m and 8 . 0 10 10 m respectively. If the speed of the comet at the16 Mar, 2021 (M)Angular momentum and Angular impulse
  8. 8A bar magnet of length 14 cm is placed in the magnetic meridian with its north pole pointing towards the geographic north pole. A neutral po16 Mar, 2021 (M)Earths magnetic field
  9. 9The volume V of an enclosure contains a mixture of three gases, 16 g of oxygen, 28 g of nitrogen and 44 g of carbon dioxide at absolute temp16 Mar, 2021 (M)Pressure and Energy of gas
  10. 10In thermodynamics, heat and work are :16 Mar, 2021 (M)First Law of Thermodynamics
  11. 11Four equal masses, m each are placed at the corners of a square of length l as shown in the figure. The moment of inertia of the system abou16 Mar, 2021 (M)Moment of inertia of rigid bodies
  12. 12A conducting wire of length l , area of crosssection A and electric resistivity is connected between the terminals of a battery. A potential16 Mar, 2021 (M)Resistance and Resistivity
  13. 13Time period of a simple pendulum is T inside a lift when the lift is stationary. If the lift moves upwards with an acceleration g 2 , the ti16 Mar, 2021 (M)Time Period and Frequency
  14. 14The velocity-displacement graph describing the motion of a bicycle is shown in the figure. The acceleration-displacement graph of the bicycl16 Mar, 2021 (M)Graphs of motion in one dimension
  15. 15A 25 m long antenna is mounted on an antenna tower. The height of the antenna tower is 75 m . The wavelength (in meter) of the signal transm16 Mar, 2021 (M)Basics of Mechanical Waves
  16. 16For an electromagnetic wave travelling in free space, the relation between average energy densities due to electric U e and magnetic U m fie16 Mar, 2021 (M)Electromagnetic Waves and Maxwell's equations
  17. 17An R C circuit as shown in the figure is driven by a A C source generating a square wave. The output wave pattern monitored by C R O would l16 Mar, 2021 (M)AC Circuits
  18. 18The stopping potential in the context of photoelectric effect depends on the following property of incident electromagnetic radiation:16 Mar, 2021 (M)Photoelectric Effect
  19. 19A block of 200 g mass moves with a uniform speed in a horizontal circular groove, with vertical side walls of radius 20 cm . If the block ta16 Mar, 2021 (M)Uniform Circular Motion
  20. 20A conducting bar of length L is free to slide on two parallel conducting rails as shown in the figure Two resistors R 1 and R 2 are connecte16 Mar, 2021 (M)Magnetic Flux, Faraday's and Lenz law
  21. 21In the figure given, the electric current flowing through the 5 k resistor is x mA . The value of x to the nearest integer is ________.16 Mar, 2021 (M)Electric Current and Drift of Electrons
  22. 22A fringe width of 6 mm was produced for two slits separated by 1 mm apart. The screen is placed 10 m away. The wavelength of light used is x16 Mar, 2021 (M)Youngs Double Slit Experiment
  23. 23Consider a 20 kg uniform circular disk of radius 0 . 2 m . It is pin supported at its center and is at rest initially. The disk is acted upo16 Mar, 2021 (M)Rotational kinematics
  24. 24The first three spectral lines of H -atom in the Balmer series are given 1 , 2 , 3 considering the Bohr atomic model, the wave lengths of fi16 Mar, 2021 (M)Atomic Spectrum
  25. 25The value of power dissipated across the zener diode V z = 15 V connected in the circuit as shown in the figure is x 10 - 1 W . The value of16 Mar, 2021 (M)Diodes
  26. 26A sinusoidal voltage of peak value 250 V is applied to a series L C R circuit, in which R = 8 , L = 24 mH and C = 60 F . The value of power 16 Mar, 2021 (M)AC Circuits
  27. 27In the logic circuit shown in the figure, if input A and B are 0 to 1 respectively, the output at Y would be x . The value of x is _________16 Mar, 2021 (M)Logic gates
  28. 28The resistance R = V I , where V = 50 2 V and I = 20 0 . 2 A . The percentage error in R is x % . The value of x to the nearest integer is _16 Mar, 2021 (M)Errors of Measurement
  29. 29Consider a frame that is made up of two thin massless rods A B and A C as shown in the figure. A vertical force P of magnitude 100 N is appl16 Mar, 2021 (M)Newton's laws of motion
  30. 30A ball of mass 10 kg moving with a velocity 10 3 m s - 1 along X -axis, hits another ball of mass 20 kg which is at rest. After the collisio16 Mar, 2021 (M)Angular momentum and Angular impulse

Frequently Asked Questions

1.How many questions are in the JEE Main 2021 16th March Morning Shift paper?

This paper has 90 questions in total - 30 each from Chemistry, Mathematics, and Physics.

2.Can I practise questions from just one subject?

Yes. Use the Chemistry, Mathematics, and Physics tabs at the top of the page to jump directly to that subject's question set within this shift.

3.Is this the same paper for all students who appeared in the morning shift?

JEE Main uses different question sets across shifts and sessions to maintain exam integrity, so this page reflects the specific paper administered in the 16th March 2021 morning shift.

4.Where can I find the evening shift paper for the same date?

The JEE Main 2021 16th March Evening Shift paper is listed separately - you can switch to it from the "JEE Main Paper Wise PYQs" panel, under JEE Main 16th March 2021.

5.How is the JEE Main 2021 16th March Morning Shift paper structured?

The JEE Main 2021 16th March Morning Shift paper on MARKS has 90 questions, organised by subject:

  • Chemistry: 30 questions - 20 single-correct and 10 numerical-value.
  • Mathematics: 30 questions - 20 single-correct and 10 numerical-value.
  • Physics: 30 questions - 20 single-correct and 10 numerical-value.
6.How difficult is the JEE Main 2021 16th March Morning Shift paper?

Each question on MARKS carries a difficulty rating. Of the 90 rated questions in this paper, 33 (37%) are easy, 43 (48%) are medium and 14 (16%) are hard. Subject wise:

  • Chemistry: 12 easy, 13 medium, 5 hard
  • Mathematics: 8 easy, 16 medium, 6 hard
  • Physics: 13 easy, 14 medium, 3 hard
7.Which chapters were asked the most in the JEE Main 2021 16th March Morning Shift paper?

The chapters with the most questions in each subject were:

  • Chemistry: General Organic Chemistry (3), Amines (2), and d and f Block Elements (2).
  • Mathematics: Definite Integration (3), Matrices (3), and Three Dimensional Geometry (3).
  • Physics: Rotational Motion (4), Alternating Current (2), and Current Electricity (2).
8.Are there any out-of-syllabus questions in the JEE Main 2021 16th March Morning Shift paper?

Yes. 19 of the 90 questions in this paper are marked on MARKS as outside the current syllabus. You can still practise them for the concept, but they are a lower priority if you are short on time.

9.Where can I find the solutions for the JEE Main 2021 16th March Morning Shift paper?

Open any question on this page. Its page shows the correct answer and, where one is available, the worked solution. A downloadable PDF of the whole shift is coming soon.

10.How should I use the JEE Main 2021 16th March Morning Shift paper to check my preparation?

Set a timer, attempt the 90 questions as you would in the exam, and only then open the answers. Note which subjects and chapters cost you the most marks, and revise those first using the chapter-wise practice for JEE Main. Repeating this with other papers shows whether the same weak spots keep coming back.

11.Will the JEE Main 2021 16th March Morning Shift paper help me prepare for JEE Main 2027?

Yes. Every past paper shows the question styles and topics JEE Main has asked before, and a solved paper gives you a realistic benchmark for speed and accuracy. Use it along with the other papers to spot the chapters that keep returning.