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JEE Main 2021 18th March Evening Shift

Browse the complete Chemistry, Mathematics, and Physics question set from the JEE Main 2021 18th March Evening 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 - 45 easy (50%), 34 moderate (38%) and 11 tough (12%). 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 37% easy, 53% moderate, 10% tough; Chemistry 73% easy, 20% moderate, 7% tough; Mathematics 40% easy, 40% moderate, 20% tough.

Chemistry questions were spread across 25 chapters, with Aldehydes and Ketones (2), Amines (2), and General Organic Chemistry (2) carrying the most weight. Mathematics questions were spread across 23 chapters, with Binomial Theorem (2), Complex Number (2), and Continuity and Differentiability (2) carrying the most weight. Physics questions were spread across 23 chapters, with Alternating Current (2), Current Electricity (2), and Motion In Two Dimensions (2) carrying the most weight.

Chemistry

  1. 1The oxidation states of nitrogen in NO , NO 2 , N 2 O and NO 3 - are in the order of :18 Mar, 2021 (E)Oxidation number
  2. 2In basic medium, H 2 O 2 exhibits which of the following reactions? (A) Mn 2 + Mn 4 + (B) I 2 I - (C) PbS PbSO 4 Choose the most appropriate18 Mar, 2021 (E)Chemical properties of hydrogen peroxide
  3. 3In the reaction of hypobromite with amide, the carbonyl carbon is lost as:18 Mar, 2021 (E)Preparation and Properties of Amides
  4. 4The oxide that shows magnetic property is:18 Mar, 2021 (E)Electrical and Magnetic properties
  5. 5Main Products formed during a reaction of 1 -methoxy naphthalene with hydroiodic acid are:18 Mar, 2021 (E)Reactions of Ethers
  6. 6Deficiency of vitamin K causes :18 Mar, 2021 (E)Vitamins
  7. 7An organic compound A on treatment with benzene sulfonyl chloride gives compound B . B is soluble in dil. NaOH solution. Compound A is :18 Mar, 2021 (E)Preparation and Properties of Amines
  8. 8The first ionization energy of magnesium is smaller, as compared to that of elements X and Y , but higher than that of Z . The elements X , 18 Mar, 2021 (E)Periodic properties
  9. 9The secondary valency and the number of hydrogen bonded water molecule(s) in CuSO 4 5 H 2 O , respectively, are18 Mar, 2021 (E)Terminology of coordination compounds
  10. 10Given below are two statements: Statement I : Bohr s theory accounts for the stability and line spectrum of Li + ion. Statement II : Bohr s 18 Mar, 2021 (E)Bohr's model
  11. 11Consider the given reaction, percentage yield of :18 Mar, 2021 (E)Reactions of aromatic compounds
  12. 12The charges on the colloidal CdS sol and TiO 2 sol are, respectively :18 Mar, 2021 (E)Properties of colloidal solution
  13. 13Match List - I with List - II : List-I (Class of Chemicals) List-II (Example) (a) Antifertility drug (i) Meprobamate (b) Antibiotic (ii) Ali18 Mar, 2021 (E)Drugs and It's Classification
  14. 14Consider the above reaction, the product X and Y respectively are :18 Mar, 2021 (E)Chemical reactions for aldehydes and ketones
  15. 15Match list-I with list-II : (a) Be (i) Treatment of cancer (b) Mg (ii) Extraction of metals (c) Ca (iii) Incendiary bombs and signals (d) Ra18 Mar, 2021 (E)Alkaline Earth Metals
  16. 16Given below are two statements : Statement I : C 2 H 5 OH and AgCN both can generate nucleophile. Statement II : KCN and AgCN both will gene18 Mar, 2021 (E)Attacking reagents
  17. 17Given below are two statements : Statement I : Non-biodegradable wastes are generated by the thermal power plants. Statement II : Bio-degrad18 Mar, 2021 (E)Water Pollution
  18. 18Match list-I with list-II : List-I List-II (a) Mercury (i) Vapour phase refining (b) Copper (ii) Distillation refining (c) Silicon (iii) Ele18 Mar, 2021 (E)Refining of Crude Metal
  19. 19In the following molecules, Hybridisation of carbon a , b and c respectively are :18 Mar, 2021 (E)Classification of organic compounds
  20. 20A hard substance melts at high temperature and is an insulator in both solid and in molten state. This solid is most likely to be a / an :18 Mar, 2021 (E)Properties and Types of Solids
  21. 21A reaction has a half life of 1 min . The time required for 99 . 9 % completion of the reaction is ___ min. (Round off to the Nearest intege18 Mar, 2021 (E)Integrated rate laws
  22. 22The molar conductivity at infinite dilution of barium chloride, sulphuric arid and hydrochloric acid are 280 , 860 426 Scm 2 mol - 1 respect18 Mar, 2021 (E)Conductance and Conductivity
  23. 23The number of species below that have two lone pairs of electrons in their central atom is ___ (Round off to the Nearest integer) SF 4 , BF 18 Mar, 2021 (E)Hybridisation and VSEPR Theory
  24. 24A xenon compound A upon partial hydrolysis gives XeO 2 F 2 . The number of lone pair of electrons present in compound A is ___ (Round off to18 Mar, 2021 (E)Noble Gases
  25. 25The gas phase reaction 2 A g A 2 g at 400 K has G o = + 25 . 2 kJ mol - 1 . The equilibrium constant K C for this reaction is ___ 10 - 2 . (18 Mar, 2021 (E)Third law of thermodynamics
  26. 26In Tollen s test for aldehyde, the overall number of electron(s) transferred to the Tollen s reagent formula Ag NH 3 2 + per aldehyde group 18 Mar, 2021 (E)Tests for aldehyde and ketones
  27. 27The solubility of CdSO 4 in water is 8 . 0 10 - 4 mol L - 1 . Its solubility in 0 . 01 M H 2 SO 4 solution is ___ 10 - 6 mol L - 1 (Round of18 Mar, 2021 (E)Solubility
  28. 28A solute A dimerizes in water. The boiling point of a 2 molal solution of A is 100 . 52 C . The percentage association of A is ___ . (Round 18 Mar, 2021 (E)Colligative Properties and Abnormal Molecular Masses
  29. 2910 . 0 ml of Na 2 CO 3 solution is titrated against 0 . 2 M HCl solution. The following values were obtained in 5 readings. 4 . 8 ml , 4 . 918 Mar, 2021 (E)Theories of Acids and Bases
  30. 30Consider the above reaction where 6 . 1 g of benzoic acid is used to get 7 . 8 g of m-bromo benzoic acid. The percentage yield of the produc18 Mar, 2021 (E)Quantitative measures in chemical equations

Mathematics

  1. 1Let y = y ( x ) be the solution of the differential equation d y d x = y + 1 y + 1 e x 2 / 2 - x , 0 x 2 . 1 , with y ( 2 ) = 0 . Then the v18 Mar, 2021 (E)Linear Differential Equation
  2. 2In a triangle A B C , if | B C | = 8 , | C A | = 7 , | A B | = 10 , then the projection of the vector A B on A C is equal to :18 Mar, 2021 (E)Product of 2 vectors
  3. 3Let the system of linear equations 4 x + y + 2 z = 0 2 x - y + z = 0 x + 2 y + 3 z = 0 , , R has a non-trivial solution. Then which of the f18 Mar, 2021 (E)System of Linear Equations
  4. 4Let f : R - { 3 } R - { 1 } be defined by f x = x - 2 x - 3 . Let g : R R be given as g ( x ) = 2 x - 3 . Then, the sum of all the values of18 Mar, 2021 (E)Inverse of a Function
  5. 5Let the centroid of an equilateral triangle A B C be at the origin. Let one of the sides of the equilateral triangle be along the straight l18 Mar, 2021 (E)Coordinate System
  6. 6Consider a hyperbola H : x 2 - 2 y 2 = 4 . Let the tangent at a point P ( 4 , 6 ) meet the x -axis at Q and latus rectum at R x 1 , y 1 , x 18 Mar, 2021 (E)Tangent to hyperbola
  7. 7If P and Q are two statements, then which of the following compound statement is a tautology?18 Mar, 2021 (E)Mathematical Reasoning
  8. 8Let g x = 0 x f t d t , where f is continuous function in [ 0 , 3 ] such that 1 3 f t 1 for all t [ 0 , 1 ] and 0 f t 1 2 for all t ( 1 , 3 18 Mar, 2021 (E)Properties of Definite Integration
  9. 9Let S 1 be the sum of first 2 n terms of an arithmetic progression. Let S 2 be the sum of first 4 n terms of the same arithmetic progression18 Mar, 2021 (E)Arithmetic Progression
  10. 10Let a complex number be w = 1 - 3 i . Let another complex number z be such that | z w | = 1 and arg z - arg w = 2 . Then the area of the tri18 Mar, 2021 (E)Euler Form and De Moivres Theorem
  11. 11Let in a series of 2 n observations, half of them are equal to a and remaining half are equal to - a . Also by adding a constant b in each o18 Mar, 2021 (E)Measures of Dispersion
  12. 12Let S 1 : x 2 + y 2 = 9 and S 2 : ( x - 2 ) 2 + y 2 = 1 . Then the locus of center of a variable circle S which touches S 1 internally and S18 Mar, 2021 (E)Locus
  13. 13Let a and b be two non-zero vectors perpendicular to each other and | a | = | b | , If | a b | = | a | , then the angle between the vectors 18 Mar, 2021 (E)Product of 2 vectors
  14. 14Let in a Binomial distribution, consisting of 5 independent trials, probabilities of exactly 1 and 2 successes be 0 . 4096 and 0 . 2048 resp18 Mar, 2021 (E)Bernoulli Trial and Binomial Distribution
  15. 15Let a tangent be drawn to the ellipse x 2 27 + y 2 = 1 at ( 3 3 cos , sin ) where 0 , 2 . Then the value of such that the sum of intercepts 18 Mar, 2021 (E)Tangent to ellipse
  16. 16Define a relation R over a class of n n real matrices A and B as A R B iff there exists a non-singular matrix P such that P A P - 1 = B . Th18 Mar, 2021 (E)Questions on Symmetric Transitive and Reflexive Properties
  17. 17A pole stands vertically inside a triangular park A B C . Let the angle of elevation of the top of the pole from each corner of the park be 18 Mar, 2021 (E)Heights and Distances
  18. 18If 15 sin 4 + 10 cos 4 = 6 , for some R , then the value of 27 sec 6 + 8 cosec 6 is equal to :18 Mar, 2021 (E)Basic Identities & T Ratios
  19. 19The area (in sq. unit) bounded by the curve 4 y 2 = x 2 ( 4 - x ) ( x - 2 ) is equal to18 Mar, 2021 (E)Area bounded by Miscellaneous Curves
  20. 20Let f : R R be a function defined as f x = sin ( a + 1 ) x + sin 2 x 2 x , if x 0 b , if x = 0 x + b x 3 - x b x 5 / 2 , if x 0 If f is cont18 Mar, 2021 (E)Continuity
  21. 21If f ( x ) and g ( x ) are two polynomials such that the polynomial P ( x ) = f x 3 + x g x 3 is divisible by x 2 + x + 1 , then P ( 1 ) is 18 Mar, 2021 (E)Cube Root of Unity
  22. 22Let I be an identity matrix of order 2 2 and P = 2 - 1 5 - 3 . Then the value of n N for which P n = 5 I - 8 P is equal to ___ .18 Mar, 2021 (E)Product of Matrices
  23. 23The term independent of x in the expansion of x + 1 x 2 / 3 - x 1 / 3 + 1 - x - 1 x - x 1 / 2 10 , x 1 , is equal to ___.18 Mar, 2021 (E)Terms of Binomial Expansion
  24. 24Let P ( x ) be a real polynomial of degree 3 which vanishes at x = - 3 . Let P ( x ) have local minima at x = 1 , local maxima at x = - 1 an18 Mar, 2021 (E)Maxima Minima
  25. 25Let the mirror image of the point ( 1 , 3 , a ) with respect to the plane r ( 2 i ^ - j ^ + k ^ ) - b = 0 be ( - 3 , 5 , 2 ) . Then the valu18 Mar, 2021 (E)Plane in Space
  26. 26Let C r n denote the binomial coefficient of x r in the expansion of ( 1 + x ) n . If k = 0 10 2 2 + 3 k C k n = . 3 10 + 2 10 , , R , then 18 Mar, 2021 (E)Sum of Series
  27. 27Let P be a plane containing the line x - 1 3 = y + 6 4 = z + 5 2 and parallel to the line x - 3 4 = y - 2 - 3 = z + 5 7 . If the point ( 1 ,18 Mar, 2021 (E)Line and Plane
  28. 28Let y = y ( x ) be the solution of the differential equation x d y - y d x = x 2 - y 2 d x , x 1 , with y ( 1 ) = 0 . If the area bounded by18 Mar, 2021 (E)Exact Forms
  29. 29Let f : R R satisfy the equation f ( x + y ) = f ( x ) f ( y ) for all x , y R and f ( x ) 0 for any x R . If the function f is differentiab18 Mar, 2021 (E)Differentiability
  30. 30If r = 1 10 r ! r 3 + 6 r 2 + 2 r + 5 = 11 ! , then the value of is equal to ___ .18 Mar, 2021 (E)Summation of Series

Physics

  1. 1Which of the following statements are correct? (A) Electric monopoles do not exist whereas magnetic monopoles exist. (B) Magnetic field line18 Mar, 2021 (E)Magnetism and Properties of Magnet
  2. 2An object of mass m 1 collides with another object of mass m 2 , which is at rest. After the collision the objects move with equal speeds in18 Mar, 2021 (E)Collisions
  3. 3For an adiabatic expansion of an ideal gas, the fractional change in its pressure is equal to (where is the ratio of specific heats):18 Mar, 2021 (E)Thermodynamic Processes
  4. 4A proton and an -particle, having kinetic energies K p and K , respectively, enter into a magnetic field at right angles. The ratio of the r18 Mar, 2021 (E)Motion of Charged Particle in Magnetic Field
  5. 5A plane electromagnetic wave propagating along y-direction can have the following pair of electric field ( E ) and magnetic field ( B ) comp18 Mar, 2021 (E)Electromagnetic Waves and Maxwell's equations
  6. 6Consider a uniform wire of mass M and length L . It is bent into a semicircle. Its moment of inertia about a line perpendicular to the plane18 Mar, 2021 (E)Moment of inertia of rigid bodies
  7. 7The velocity-displacement graph of a particle is shown in the figure. The acceleration-displacement graph of the same particle is represente18 Mar, 2021 (E)Graphs of motion in one dimension
  8. 8The correct relation between (ratio of collector current to emitter current) and (ratio of collector current to base current) of a transisto18 Mar, 2021 (E)Junction Transistors
  9. 9Three rays of light, namely red R , green ( G ) and blue ( B ) are incident on the face P Q of a right angled prism P Q R as shown in figure18 Mar, 2021 (E)Critical angle and total internal reflection
  10. 10If the angular velocity of earth s spin is increased such that the bodies at the equator start floating, the duration of the day would be ap18 Mar, 2021 (E)Uniform Circular Motion
  11. 11The decay of a proton to neutron is :18 Mar, 2021 (E)Nuclear reactions
  12. 12In a series LCR circuit, the inductive reactance X L is 10 and the capacitive reactance X C is 4 . The resistance ( R ) in the circuit is 6 18 Mar, 2021 (E)Quality and Power Factor
  13. 13The angular momentum of a planet of mass M moving around the sun in an elliptical orbit is L . The magnitude of the areal velocity of the pl18 Mar, 2021 (E)Kepler laws
  14. 14The function of time representing a simple harmonic motion with a period of is :18 Mar, 2021 (E)Superposition of S.H.M's and Resonance
  15. 15A solid cylinder of mass m is wrapped with an inextensible light string and, is placed on a rough inclined plane as shown in the figure. The18 Mar, 2021 (E)Torque
  16. 16The time taken for the magnetic energy to reach 25 % of its maximum value, when a solenoid of resistance R , inductance L is connected to a 18 Mar, 2021 (E)AC Circuits
  17. 17A particle of mass m moves in a circular orbit under the central potential field, U r = - C r , where C is a positive constant. The correct 18 Mar, 2021 (E)Energy
  18. 18An ideal gas in a cylinder is separated by a piston in such a way that the entropy of one part is S 1 and that of the other part is S 2 . Gi18 Mar, 2021 (E)Heat Engine, Refrigerator and Second Law of Thermodynamics
  19. 19Consider a sample of oxygen behaving like an ideal gas. At 300 K , the ratio of root-mean-square (RMS) velocity to the average velocity of t18 Mar, 2021 (E)Speed of Gas
  20. 20The speed of electrons in a scanning electron microscope is 1 10 7 ms - 1 . If the protons having the same speed are used instead of electro18 Mar, 2021 (E)Davison and Germer Experiment
  21. 21The projectile motion of a particle of mass 5 g is shown in the figure. The initial velocity of the particle is 5 2 ms - 1 and the air resis18 Mar, 2021 (E)Projectile motion
  22. 22A ball of mass 4 kg , moving with a velocity of 10 m s - 1 , collides with a spring of length 8 m and force constant 100 N m - 1 . The lengt18 Mar, 2021 (E)Energy
  23. 23The typical output characteristics curve for a transistor working in the common-emitter configuration is shown in the figure. The estimated 18 Mar, 2021 (E)Junction Transistors
  24. 24Consider a water tank as shown in the figure. It s cross-sectional area is 0 . 4 m 2 . The tank has an opening B near the bottom whose cross18 Mar, 2021 (E)Hydrodynamics
  25. 25A TV transmission tower antenna is at a height of 20 m . Suppose that the receiving antenna is at. (i) ground level (ii) a height of 5 m . T18 Mar, 2021 (E)Propagation of EM Waves
  26. 26The radius of a sphere is measured to be ( 7 . 50 0 . 85 ) cm . Suppose the percentage error in its volume is x . The value of x , to the ne18 Mar, 2021 (E)Errors of Measurement
  27. 27An infinite number of point charges, each carrying 1 C charge, are placed along the y-axis at y = 1 m , 2 m , 4 m , 8 m . . . . The total fo18 Mar, 2021 (E)Electric Charge and Coulomb's law
  28. 28Consider a 72 cm long wire A B as shown in the figure. The galvanometer jockey is placed at P on A B at a distance x cm from A . The galvano18 Mar, 2021 (E)Wheatstone Bridge
  29. 29Two wires of same length and thickness having specific resistances 6 cm and 3 cm respectively are connected in parallel. The effective resis18 Mar, 2021 (E)Resistance and Resistivity
  30. 30A galaxy is moving away from the earth at a speed of 286 km s - 1 . The shift in the wavelength of a red line at 630 nm is x 10 - 10 m . The18 Mar, 2021 (E)Doppler's Effect

Frequently Asked Questions

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

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

The JEE Main 2021 18th March Morning 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.What is the structure of the JEE Main 2021 18th March Evening Shift paper?

The JEE Main 2021 18th March Evening 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.What is the difficulty level of the JEE Main 2021 18th March Evening Shift paper?

Each question on MARKS carries a difficulty rating. Of the 90 rated questions in this paper, 45 (50%) are easy, 34 (38%) are medium and 11 (12%) are hard. Subject wise:

  • Chemistry: 22 easy, 6 medium, 2 hard
  • Mathematics: 12 easy, 12 medium, 6 hard
  • Physics: 11 easy, 16 medium, 3 hard
7.Which chapters had the most questions in the JEE Main 2021 18th March Evening Shift paper?

The chapters with the most questions in each subject were:

  • Chemistry: Aldehydes and Ketones (2), Amines (2), and General Organic Chemistry (2).
  • Mathematics: Binomial Theorem (2), Complex Number (2), and Continuity and Differentiability (2).
  • Physics: Alternating Current (2), Current Electricity (2), and Motion In Two Dimensions (2).
8.Are there any out-of-syllabus questions in the JEE Main 2021 18th March Evening Shift paper?

Yes. 24 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 Evening 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 Evening 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 Evening 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.