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JEE Main 2021 18th March Morning Shift

Browse the complete Chemistry, Mathematics, and Physics question set from the JEE Main 2021 18th 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 - 41 easy (46%), 40 moderate (44%) and 9 tough (10%). That's an easier-than-usual mix for this exam - aim to clear it quickly and save time for the harder papers. By subject: Physics 43% easy, 47% moderate, 10% tough; Chemistry 53% easy, 40% moderate, 7% tough; Mathematics 40% easy, 47% moderate, 13% tough.

Chemistry questions were spread across 23 chapters, with Amines (3), Coordination Compounds (3), and Alcohols Phenols and Ethers (2) carrying the most weight. Mathematics questions were spread across 21 chapters, with Circle (2), Complex Number (2), and Functions (2) carrying the most weight. Physics questions were spread across 24 chapters, with Current Electricity (3), Alternating Current (2), and Dual Nature of Matter (2) carrying the most weight.

Chemistry

  1. 1Considering the above reaction, X and Y respectively are:18 Mar, 2021 (M)Preparation and Properties of Amines
  2. 2The ionic radius of Na + ions is 1 . 02 A . The ionic radii (in A ) of Mg 2 + and Al 3 + , respectively, are18 Mar, 2021 (M)Periodic properties
  3. 3Reaction of Grignard reagent, C 2 H 5 MgBr with C 8 H 8 O followed by hydrolysis gives compound A , which reacts instantly with Lucas reagen18 Mar, 2021 (M)Preparation and Properties of Aryl Halides
  4. 4Reagent, 1 - naphthylamine and sulphanilic acid in acetic acid is used for the detection of18 Mar, 2021 (M)Qualitative analysis of organic compounds
  5. 5A non-reducing sugar A hydrolyses to give two reducing mono saccharides. Sugar A is18 Mar, 2021 (M)Carbohydrates
  6. 6Match the list - I with list - II List - I (Class of Drug) List - II (Example) (a) Antacid (i) Novestrol (b) Artificial sweetener (ii) Cimet18 Mar, 2021 (M)Drugs and It's Classification
  7. 7Consider the above chemical reaction and identify product A18 Mar, 2021 (M)Preparation and Properties of Cyanides
  8. 8Match List - I with List - II List - I List - II (a) Chlorophyll (i) Ruthenium (b) Vitamin - B 12 (ii) Platinum (c) Anticancer drug (iii) Co18 Mar, 2021 (M)Terminology of coordination compounds
  9. 9Match List - I with List - II : List - I (Chemicals) List - II (Use / Preparation / Constituent) (a) Alcoholic potassium hydroxide (i) Elect18 Mar, 2021 (M)Reactions of Carbonyl Compounds
  10. 10The satements that are TRUE: (A) Methane leads to both global warming and photochemical smog (B) Methane is generated from paddy fields (C) 18 Mar, 2021 (M)Air Pollution
  11. 11Match List - I with List - II List - I List - II (a) Ca ( OCl ) 2 (i) Antacid (b) CaSO 4 1 2 H 2 O (ii) Cement (c) CaO (iii) Bleach (d) CaCO18 Mar, 2021 (M)Compounds of Alkaline Earth Metals
  12. 12Compound with molecular formula C 3 H 6 O can show:18 Mar, 2021 (M)Isomerism of Organic Compounds
  13. 13The correct structures of trans - NiBr PPh 3 2 2 and meridional - Co NH 3 3 NO 2 3 respectively, are:18 Mar, 2021 (M)Isomerism of coordination compounds
  14. 14A certain orbital has no angular nodes and two radial nodes. The orbital is:18 Mar, 2021 (M)Quantum mechanical model
  15. 15Considering the above chemical reaction, identify the product X :18 Mar, 2021 (M)Reactions of Ethers
  16. 16Match List - I with List - II List - I (process) List - II (catalyst) (a) Deacon s process (i) ZSM - 5 (b) Contact process (ii) CuCl 2 (c) C18 Mar, 2021 (M)Properties of D-block elements
  17. 17Given below are two statements: One is labelled as Assertion A and the other labelled as reason R Assertion A : During the boiling of water 18 Mar, 2021 (M)Chemical properties of heavy water
  18. 18The number of ionisable hydrogens present in the product obtained from a reaction of phosphorus trichloride and phosphonic acid is:18 Mar, 2021 (M)Phosphorus and Its Compounds
  19. 19In a binary compound, atoms of element A form a hcp structure and those of element M occupy 2 / 3 of the tetrahedral voids of the hcp struct18 Mar, 2021 (M)Cubic system
  20. 20The chemical that is added to reduce the melting point of the reaction mixture during the extraction of aluminium is:18 Mar, 2021 (M)Extraction of Metals
  21. 21AX is a covalent diatomic molecule where A and X are second row elements of periodic table. Based on Molecular orbital theory, the bond orde18 Mar, 2021 (M)Molecular Orbital Theory
  22. 22In order to prepare a buffer solution of pH 5 . 74 , sodium acetate is added to acetic acid. If the concentration of acetic acid in the buff18 Mar, 2021 (M)Buffer solutions
  23. 232 NO ( g ) + Cl 2 ( g ) 2 NOCl ( s ) This reaction was studied at - 10 C and the following data was obtained run [ NO ] 0 Cl 2 0 r 0 1 0.10 18 Mar, 2021 (M)Rate law and rate constant
  24. 24For the reaction C 2 H 6 C 2 H 4 + H 2 the reaction enthalpy r H in kJmol - 1 is (Round off to the Nearest Integer). [Given : Bond enthalpie18 Mar, 2021 (M)Laws of Thermochemistry and Enthalpy Change
  25. 25______grams of 3 - Hydroxy propanal ( MW = 74 ) must be dehydrated to produce 7 . 8 g of acrolein ( MW = 56 ) C 3 H 4 O if the percentage yi18 Mar, 2021 (M)Quantitative measures in chemical equations
  26. 26A reaction of 0.1 mole of Benzylamine with bromomethane gave 23 g of Benzyl trimethyl ammonium bromide. The number of moles of bromomethane 18 Mar, 2021 (M)Preparation and Properties of Amines
  27. 27The total number of unpaired electrons present in the complex K 3 Cr ( oxalate ) 3 is______.18 Mar, 2021 (M)Werner's theory and Valence Bond Theory
  28. 282 molal solution of a weak acid HA has a freezing point of 3 . 885 C . The degree of dissociation of this acid is ______ 10 - 3 . (Round off18 Mar, 2021 (M)Colligative Properties and Abnormal Molecular Masses
  29. 29For the reaction 2 Fe 3 + ( aq ) + 2 I - ( aq ) 2 Fe 2 + ( aq ) + I 2 ( s ) the magnitude of the standard molar free energy change, r G m = 18 Mar, 2021 (M)Cells and Electrode Potential, Nernst Equation
  30. 30Complete combustion of 3 g of ethane gives x 10 22 molecules of water. The value of x is ______ (Round off to the Nearest Integer). Use : N 18 Mar, 2021 (M)Quantitative measures in chemical equations

Mathematics

  1. 1The differential equation satisfied by the system of parabolas y 2 = 4 a ( x + a ) is18 Mar, 2021 (M)Formation of Differential Equation
  2. 2The number of integral values of m so that the abscissa of point of intersection of lines 3 x + 4 y = 9 and y = m x + 1 is also an integer, 18 Mar, 2021 (M)Concurrency & Family of Lines
  3. 3Let 1 + x + 2 x 2 20 = a 0 + a 1 x + a 2 x 2 + + a 40 x 40 , then a 1 + a 3 + a 5 + + a 37 is equal to18 Mar, 2021 (M)Sum of Series
  4. 4Choose the correct statement about two circles whose equations are given below: x 2 + y 2 - 10 x - 10 y + 41 = 0 x 2 + y 2 - 22 x - 10 y + 118 Mar, 2021 (M)Intersection of Circles
  5. 5The integral ( 2 x - 1 ) cos ( 2 x - 1 ) 2 + 5 4 x 2 - 4 x + 6 d x is equal to (where c is a constant of integration)18 Mar, 2021 (M)Integration by Substitution
  6. 6The equation of one of the straight lines which passes through the point ( 1 , 3 ) and makes an angles tan - 1 ( 2 ) with the straight line,18 Mar, 2021 (M)Angle between Lines
  7. 7If lim x 0 sin - 1 x - tan - 1 x 3 x 3 is equal to L , then the value of ( 6 L + 1 ) is18 Mar, 2021 (M)Miscellaneous
  8. 8A vector a has components 3 p and 1 with respect to a rectangular cartesian system. This system is rotated through a certain angle about the18 Mar, 2021 (M)Product of 2 vectors
  9. 9If the equation a | z | 2 + z + z + d = 0 represents a circle where a , d are real constants then which of the following condition is correc18 Mar, 2021 (M)Geometry of Complex Number
  10. 10For the four circles M , N , O and P , following four equations are given: Circle M : x 2 + y 2 = 1 Circle N : x 2 + y 2 - 2 x = 0 Circle O 18 Mar, 2021 (M)Locus
  11. 11If , are natural numbers such that 100 - 199 = ( 100 ) ( 100 ) + ( 99 ) ( 101 ) + ( 98 ) ( 102 ) + . . + ( 1 ) ( 199 ) , then the slope of t18 Mar, 2021 (M)Summation of Series
  12. 12The real valued function f x = cosec - 1 x x - [ x ] , where x denotes the greatest integer less than or equal to x , is defined for all x b18 Mar, 2021 (M)Domain
  13. 131 3 2 - 1 + 1 5 2 - 1 + 1 7 2 - 1 + + 1 ( 201 ) 2 - 1 is equal to18 Mar, 2021 (M)Summation of Series
  14. 14If the functions are defined as f ( x ) = x and g ( x ) = 1 - x , then what is the common domain of the following functions: f + g , f - g ,18 Mar, 2021 (M)Domain
  15. 15If f x = 1 | x | ; | x | 1 a x 2 + b ; | x | 1 is differentiable at every point of the domain, then the values of a and b are respectively:18 Mar, 2021 (M)Differentiability
  16. 16Let A + 2 B = 1 2 0 6 - 3 3 - 5 3 1 and 2 A - B = 2 - 1 5 2 - 1 6 0 1 2 . If T r A denotes the sum of all diagonal elements of the matrix A 18 Mar, 2021 (M)Basic Algebra of Matrices
  17. 17The sum of all the 4 -digit distinct numbers that can be formed with the digits 1 , 2 , 2 and 3 is:18 Mar, 2021 (M)Summation of Numbers
  18. 18The value of 3 + 1 4 + 1 3 + 1 4 + 1 3 + is equal to18 Mar, 2021 (M)Relation between Roots and Coefficients
  19. 19The number of times the digit 3 will be written when listing the integers from 1 to 1000 is18 Mar, 2021 (M)Arrangement under Constraint
  20. 20Let the plane a x + b y + c z + d = 0 bisect the line joining the points 4 , - 3 , 1 and 2 , 3 , - 5 at the right angles. If a , b , c , d a18 Mar, 2021 (M)Plane in Space
  21. 21Let f x and g x be two functions satisfying f x 2 + g ( 4 - x ) = 4 x 3 and g 4 - x + g x = 0 , then the value of - 4 4 f x 2 d x is18 Mar, 2021 (M)Properties of Definite Integration
  22. 22Let z 1 , z 2 be the roots of the equation z 2 + a z + 12 = 0 and z 1 , z 2 form an equilateral triangle with origin. Then, the value of a i18 Mar, 2021 (M)Geometry of Complex Number
  23. 23The equation of the planes parallel to the plane x - 2 y + 2 z - 3 = 0 which are at unit distance from the point 1 , 2 , 3 is a x + b y + c 18 Mar, 2021 (M)Plane in Space
  24. 24The mean age of 25 teachers in a school is 40 years. A teacher retires at the age of 60 years and a new teacher is appointed in his place. I18 Mar, 2021 (M)Mean
  25. 25If f x = 5 x 8 + 7 x 6 x 2 + 1 + 2 x 7 2 d x , x 0 , f 0 = 0 and f 1 = 1 K , then the value of K is18 Mar, 2021 (M)Integration by Substitution
  26. 26A square A B C D has all its vertices on the curve x 2 y 2 = 1 . The midpoints of its sides also lie on the same curve. Then, the square of 18 Mar, 2021 (M)Rectangular hyperbola
  27. 27Let , , be the real roots of the equation, x 3 + a x 2 + b x + c = 0 , ( a , b , c R and a , b 0 ). If the system of equations (in, u , v , 18 Mar, 2021 (M)System of Linear Equations
  28. 28The missing value in the following figure is18 Mar, 2021 (M)Mathematical Reasoning
  29. 29The solutions of the equation 1 + sin 2 x sin 2 x sin 2 x cos 2 x 1 + cos 2 x cos 2 x 4 sin 2 x 4 sin 2 x 1 + 4 sin 2 x = 0 , 0 x , are18 Mar, 2021 (M)Solving Trigonometric Equation
  30. 30The number of solutions of the equation | cot x | = cot x + 1 sin x in the interval [ 0 , 2 ] is18 Mar, 2021 (M)Solving Trigonometric Equation

Physics

  1. 1An oil drop of the radius 2 mm with a density 3 g cm - 3 is held stationary under a constant electric field 3 . 55 10 5 V m - 1 in the Milli18 Mar, 2021 (M)Cathode Rays and Positive Rays
  2. 2Match List I with List II . List I List II (a) 10 km height over earth s surface (i) Thermosphere (b) 70 km height over earth s surface (ii)18 Mar, 2021 (M)Propagation of EM Waves
  3. 3Imagine that the electron in a hydrogen atom is replaced by a muon . The mass of muon particle is 207 times that of an electron and charge i18 Mar, 2021 (M)Atomic Structure
  4. 4A plane electromagnetic wave of frequency 100 MHz is traveling in a vacuum along the x - direction. At a particular point in space and time,18 Mar, 2021 (M)Electromagnetic Waves and Maxwell's equations
  5. 5A thin circular ring of mass M and radius r is rotating about its axis with an angular speed . Two particles having mass m each are now atta18 Mar, 2021 (M)Moment of inertia of rigid bodies
  6. 6Four identical long solenoids A , B , C and D are connected to each other as shown in the figure. If the magnetic field at the center of A i18 Mar, 2021 (M)Magnetic Field
  7. 7The time period of a simple pendulum is given by T = 2 l g . The measured value of the length of the pendulum is 10 cm known to a 1 mm accur18 Mar, 2021 (M)Errors of Measurement
  8. 8A constant power delivering machine has towed a box, which was initially at rest, along a horizontal straight line. The distance moved by th18 Mar, 2021 (M)Power
  9. 9What will be the average value of energy along one degree of freedom for an ideal gas in thermal equilibrium at a temperature T ? ( k B is B18 Mar, 2021 (M)Pressure and Energy of gas
  10. 10A radioactive sample disintegrates via two independent decay processes having half lives T 1 / 2 ( 1 ) and T 1 / 2 ( 2 ) respectively. The e18 Mar, 2021 (M)Radioactivity
  11. 11The P - V diagram of a diatomic ideal gas system going under cyclic process as shown in figure. The work done during an adiabatic process C 18 Mar, 2021 (M)Thermodynamic Processes
  12. 12In Young s double slit arrangement, slits are separated by a gap of 0 . 5 mm , and the screen is placed at a distance of 0 . 5 m from them. 18 Mar, 2021 (M)Youngs Double Slit Experiment
  13. 13A particle is travelling 4 times as fast as an electron. Assuming the ratio of de-Broglie wavelength of a particle to that of electron is 2 18 Mar, 2021 (M)Matter Waves
  14. 14The position, velocity and acceleration of a particle moving with a constant acceleration can be represented by :18 Mar, 2021 (M)Graphs of motion in one dimension
  15. 15In the experiment of Ohm s law, a potential difference of 5 . 0 V is applied across the end of a conductor of length 10 . 0 cm and diameter 18 Mar, 2021 (M)Electric Current and Drift of Electrons
  16. 16In a scries L C R resonance circuit, if we change the resistance only, from a lower to higher value :18 Mar, 2021 (M)AC Circuits
  17. 17An A C source rated 220 V , 50 Hz is connected to a resistor. The time taken by the current to change from its maximum to the rms value is :18 Mar, 2021 (M)Alternating Current, Voltage and Power
  18. 18Your friend is having eye sight problem. She is not able to see clearly a distant uniform window mesh and it appears to her as nonuniform an18 Mar, 2021 (M)Human eye
  19. 19A loop of flexible wire of irregular shape carrying current is placed in an external magnetic field. Identify the effect of the field on the18 Mar, 2021 (M)Magnetic Field
  20. 20The time period of a satellite in a circular orbit of the radius R is T . The period of another satellite in a circular orbit of the radius 18 Mar, 2021 (M)Kepler laws
  21. 21A particle performs simple harmonic motion with a period of 2 second. The time taken by the particle to cover a displacement equal to half o18 Mar, 2021 (M)Simple Harmonic Motion
  22. 22The circuit shown in the figure consists of a charged capacitor of capacity 3 F and a charge of 30 C . At time t = 0 , when the key is close18 Mar, 2021 (M)Electric Current and Drift of Electrons
  23. 23The voltage across the 10 resistor in the given circuit is x volt. The value of x to the nearest integer is _____.18 Mar, 2021 (M)Combination of Resistances
  24. 24Two separate wires A and B are stretched by 2 mm and 4 mm respectively, when they are subjected to a force of 2 N . Assume that both the wir18 Mar, 2021 (M)Young's Modulus and Breaking Stres
  25. 25A person is swimming with a speed of 10 m s - 1 at an angle of 120 with the flow and reaches to a point directly opposite on the other side 18 Mar, 2021 (M)Relative motion
  26. 26A parallel plate capacitor has plate area 100 m 2 and plate separation of 10 m . The space between the plates is filled up to a thickness 5 18 Mar, 2021 (M)Capacitors with Dielectric
  27. 27A ball of mass 10 kg moving with a velocity 10 3 m s - 1 along the x -axis, hits another ball of mass 20 kg which is at rest. After the coll18 Mar, 2021 (M)Collisions
  28. 28As shown in the figure, a particle of mass 10 kg is placed at a point A . When the particle is slightly displaced to its right, it starts mo18 Mar, 2021 (M)Energy
  29. 29An n p n transistor operates as a common emitter amplifier with a power gain of 10 6 . The input circuit resistance is 100 and the output lo18 Mar, 2021 (M)Junction Transistors
  30. 30A bullet of mass 0 . 1 kg is fired on a wooden block to pierce through it, but it stops after moving a distance of 50 cm into it. If the vel18 Mar, 2021 (M)Newton's laws of motion

Frequently Asked Questions

1.How many questions are in the JEE Main 2021 18th 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 18th March 2021 morning shift.

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

The JEE Main 2021 18th March Evening Shift paper is listed separately - you can switch to it from the "JEE Main Paper Wise PYQs" panel, under JEE Main 18th March 2021.

5.How is the JEE Main 2021 18th March Morning Shift paper structured?

The JEE Main 2021 18th 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 18th March Morning Shift paper?

Each question on MARKS carries a difficulty rating. Of the 90 rated questions in this paper, 41 (46%) are easy, 40 (44%) are medium and 9 (10%) are hard. Subject wise:

  • Chemistry: 16 easy, 12 medium, 2 hard
  • Mathematics: 12 easy, 14 medium, 4 hard
  • Physics: 13 easy, 14 medium, 3 hard
7.Which chapters were asked the most in the JEE Main 2021 18th March Morning Shift paper?

The chapters with the most questions in each subject were:

  • Chemistry: Amines (3), Coordination Compounds (3), and Alcohols Phenols and Ethers (2).
  • Mathematics: Circle (2), Complex Number (2), and Functions (2).
  • Physics: Current Electricity (3), Alternating Current (2), and Dual Nature of Matter (2).
8.Are there any out-of-syllabus questions in the JEE Main 2021 18th March Morning Shift paper?

Yes. 21 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 18th 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 18th 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 18th 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.