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JEE Main 2021 1st September Evening Shift

Browse the complete Chemistry, Mathematics, and Physics question set from the JEE Main 2021 1st September 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 - 22 easy (24%), 48 moderate (53%) and 20 tough (22%). That's a fairly typical mix for this exam. By subject: Physics 13% easy, 60% moderate, 27% tough; Chemistry 37% easy, 57% moderate, 7% tough; Mathematics 23% easy, 43% moderate, 33% tough.

Chemistry questions were spread across 23 chapters, with Aldehydes and Ketones (2), Amines (2), and Chemical Bonding and Molecular Structure (2) carrying the most weight. Mathematics questions were spread across 22 chapters, with Definite Integration (3), Functions (2), and Permutation Combination (2) carrying the most weight. Physics questions were spread across 24 chapters, with Current Electricity (2), Electromagnetic Induction (2), and Gravitation (2) carrying the most weight.

Chemistry

  1. 1Which one of the following gives the most stable Diazonium salt ?01 Sep, 2021 (E)Preparation and Properties of Amines
  2. 2The potassium ferrocyanide solution gives a Prussian blue colour, when added to :01 Sep, 2021 (E)Qualitative analysis of organic compounds
  3. 3Which one of the following compounds is aromatic in nature?01 Sep, 2021 (E)Conjugation and Aromaticity
  4. 4Monomer units of Dacron polymer are :01 Sep, 2021 (E)Preparation and Properties of Polymers
  5. 5Number of paramagnetic oxides among the following given oxides is _ _ _ _ _ _ _ _ _ _ _ . Li 2 O , CaO , Na 2 O 2 , KO 2 , MgO and K 2 O01 Sep, 2021 (E)Molecular Orbital Theory
  6. 6Experimentally reducing a functional group cannot be done by which one of the following reagents ?01 Sep, 2021 (E)Chemical reactions for aldehydes and ketones
  7. 7In the following sequence of reactions a compound A , (molecular formula C 6 H 12 O 2 ) with a straight chain structure gives a C 4 carboxyl01 Sep, 2021 (E)Preparation and Properties of Carboxylic Acids
  8. 8Water sample is called cleanest on the basis of which one of the BOD values given below :01 Sep, 2021 (E)Water Pollution
  9. 9Identify A in the following reaction.01 Sep, 2021 (E)Preparation and Properties of Amines
  10. 10Given below are two statements : Statement I : The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves pro01 Sep, 2021 (E)Chemical reactions for aldehydes and ketones
  11. 11Match List - I with List - II . List- I (Colloid Preparation Method) List- II (Chemical Reaction) ( a ) Hydrolysis ( i ) 2 AuCl 3 + 3 HCHO +01 Sep, 2021 (E)Preparation and Purification of colloids
  12. 12The stereoisomers that are formed by electrophilic addition of bromine to trans - but - 2 - ene is/are :01 Sep, 2021 (E)Reactions of alkenes
  13. 13The oxide without nitrogen-nitrogen bond is :01 Sep, 2021 (E)Nitrogen and Its Compounds
  14. 14Calamine and Malachite, respectively, are the ores of :01 Sep, 2021 (E)Minerals and ores
  15. 15In the given chemical reaction, colors of the Fe 2 + and Fe 3 + ions, are respectively : 5 Fe 2 + + MnO 4 - + 8 H + Mn 2 + + 4 H 2 O + 5 Fe 01 Sep, 2021 (E)Compounds of Transition Metals
  16. 16Identify the element for which electronic configuration in + 3 oxidation state is [ Ar ] 3 d 5 :01 Sep, 2021 (E)Properties of D-block elements
  17. 17The Crystal Field Stabilization Energy (CFSE) and magnetic moment (spin-only) of an octahedral aqua complex of a metal ion M Z + are - 0 . 801 Sep, 2021 (E)Crystal Field Theory
  18. 18In the following sequence of reactions, C 3 H 6 H + / H 2 O A KIO dilKOH B + C . The compounds B and C respectively are :01 Sep, 2021 (E)Reactions of alkenes
  19. 19Which one of the following given graphs represents the variation of rate constant ( k ) with temperature ( T ) for an endothermic reaction?01 Sep, 2021 (E)Rate law and rate constant
  20. 20Hydrogen peroxide reacts with iodine in basic medium to give :01 Sep, 2021 (E)Chemical properties of hydrogen peroxide
  21. 21If the conductivity of mercury at 0 C is 1 . 07 10 6 S m - 1 and the resistance of a cell containing mercury is 0 . 243 , then the cell cons01 Sep, 2021 (E)Conductance and Conductivity
  22. 22A 50 watt bulb emits monochromatic red light of wavelength of 795 nm . The number of photons emitted per second by the bulb is x 10 20 . The01 Sep, 2021 (E)Dual Behaviour of Matter and Heisenberg Uncertainty Principle
  23. 23If 80 g of copper sulphate CuSO 4 5 H 2 O is dissolved in deionised water to make 5 L of solution. The concentration of the copper sulphate 01 Sep, 2021 (E)Solubility and Concentration of Solutions
  24. 24The sum of oxidation states of two silver ions in Ag NH 3 2 Ag ( CN ) 2 complex is _____ .01 Sep, 2021 (E)Terminology of coordination compounds
  25. 25For the reaction 2 NO 2 ( g ) N 2 O 4 ( g ) , when S = - 176 . 0 J K - 1 and H = - 57 . 8 kJ mol - 1 the magnitude of G at 298 K for the rea01 Sep, 2021 (E)Third law of thermodynamics
  26. 26A peptide synthesized by the reactions of one molecule each of Glycine, Leucine, Aspartic acid and Histidine will have _____ peptide linkage01 Sep, 2021 (E)Properties and Preparation of Amino Acids
  27. 27The spin-only magnetic moment value of B 2 + species is 10 - 2 BM (Nearest integer) [ Given : 3 = 1 . 73 ]01 Sep, 2021 (E)Molecular Orbital Theory
  28. 28The number of atoms in 8 g of sodium is x 10 23 . The value of x is _____ . (Nearest integer) Given : N A = 6 . 02 10 23 mol - 1 Atomic mass01 Sep, 2021 (E)Mole concept
  29. 29An empty LPG cylinder weighs 14 . 8 kg . When full, it weighs 29 . 0 kg and shows a pressure of 3 . 47 atm . In the course of use at ambient01 Sep, 2021 (E)Gas laws and Ideal Gas Equation
  30. 30The molar solubility of Zn ( OH ) 2 in 0 . 1 MNaOH solution is x 10 - 18 M . The value of x is _____ . (Nearest integer) Given : The solubil01 Sep, 2021 (E)Solubility

Mathematics

  1. 1cos - 1 ( cos ( - 5 ) ) + sin - 1 ( sin ( 6 ) ) - tan - 1 ( tan ( 12 ) ) is equal to : (The inverse trigonometric functions take the princip01 Sep, 2021 (E)T inverse T property
  2. 2Let S n = 1 ( n - 1 ) + 2 ( n - 2 ) + 3 ( n - 3 ) + + ( n - 1 ) 1 , n 4 . The sum n = 4 2 S n n ! - 1 ( n - 2 ) ! is equal to :01 Sep, 2021 (E)Summation of Series
  3. 3The number of pairs a , b of real numbers, such that whenever is a root of the equation x 2 + a x + b = 0 , 2 - 2 is also a root of this equ01 Sep, 2021 (E)Relation between Roots and Coefficients
  4. 4The range of the function f ( x ) = log 5 3 + cos 3 4 + x + cos 4 + x + cos 4 - x - cos 3 4 - x is :01 Sep, 2021 (E)Range
  5. 5Let f : R R be a continuous function. Then lim x / 4 4 2 sec 2 x f ( x ) d x x 2 - 2 16 is equal to:01 Sep, 2021 (E)Leibnitz Rule of Differentiation
  6. 6If y = y ( x ) is the solution curve of the differential equation x 2 d y + y - 1 x d x = 0 ; x 0 and y ( 1 ) = 1 , then y 1 2 is equal to :01 Sep, 2021 (E)Linear Differential Equation
  7. 7Consider the parabola with vertex 1 2 , 3 4 and the directrix y = 1 2 . Let P be the point where the parabola meets the line x = - 1 2 . If 01 Sep, 2021 (E)Normal to Parabola
  8. 8Consider the system of linear equations - x + y + 2 z = 0 3 x - a y + 5 z = 1 2 x - 2 y - a z = 7 Let S 1 be the set of all a R for which th01 Sep, 2021 (E)System of Linear Equations
  9. 9The distance of line 3 y - 2 z - 1 = 0 = 3 x - z + 4 from the point ( 2 , - 1 , 6 ) is :01 Sep, 2021 (E)Plane in Space
  10. 10The area, enclosed by the curves y = sin x + cos x and y = | cos x - sin x | and the lines x = 0 , x = 2 , is :01 Sep, 2021 (E)Area bounded by Miscellaneous Curves
  11. 11If n is the number of solutions of the equation 2 cos x 4 sin 4 + x sin 4 - x - 1 = 1 , x 0 , and S is the sum of all these solutions, then 01 Sep, 2021 (E)Solving Trigonometric Equation
  12. 12The function f x = x 3 - 6 x 2 + a x + b is such that f 2 = f 4 = 0 . Consider two statements: S 1 there exists x 1 , x 2 2 , 4 , x 1 x 2 , 01 Sep, 2021 (E)Monotonicity
  13. 13Let J n , m = 0 1 / 2 x n x m - 1 d x , n m and n , m N . Consider a matrix A = a i j 3 3 where a i j = J 6 + i , 3 - J i + 3 , 3 , i j 0 , 01 Sep, 2021 (E)Miscellaneous
  14. 14Let the acute angle bisector of the two planes x - 2 y - 2 z + 1 = 0 and 2 x - 3 y - 6 z + 1 = 0 be the plane P . Then which of the followin01 Sep, 2021 (E)Plane in Space
  15. 15Two squares are chosen at random on a chessboard (see figure). The probability that they have a side in common is :01 Sep, 2021 (E)Classical Definition of Probability
  16. 16Which of the following is equivalent to the Boolean expression p ~ q ?01 Sep, 2021 (E)Mathematical Reasoning
  17. 17Let be the acute angle between the tangents to the ellipse x 2 9 + y 2 1 = 1 and the circle x 2 + y 2 = 3 at their point of intersection in 01 Sep, 2021 (E)Tangent to ellipse
  18. 18The function f ( x ) , that satisfies the condition f ( x ) = x + 0 / 2 sin x cos y f ( y ) d y , is :01 Sep, 2021 (E)Miscellaneous
  19. 19Let P 1 , P 2 , P 15 be 15 points on a circle. The number of distinct triangles formed by points P i , P j , P k such that i + j + k 15 , is01 Sep, 2021 (E)Geometric Permutation
  20. 20Let a 1 , a 2 , , a 21 be an A . P . such that n = 1 20 1 a n a n + 1 = 4 9 . If the sum of this A . P . is 189 , then a 6 a 16 is equal to 01 Sep, 2021 (E)Summation of Series
  21. 21Let the points of intersections of the lines x - y + 1 = 0 , x - 2 y + 3 = 0 and 2 x - 5 y + 11 = 0 are the mid points of the sides of a tri01 Sep, 2021 (E)Coordinate System
  22. 22Let f ( x ) be a polynomial of degree 3 such that f k = - 2 k for k = 2 , 3 , 4 , 5 . Then the value of 52 - 10 f ( 10 ) is equal to _____ .01 Sep, 2021 (E)Functional Equation
  23. 23Let [ t ] denote the greatest integer t . The number of points where the function f ( x ) = [ x ] x 2 - 1 + sin [ x ] + 3 - [ x + 1 ] , x ( 01 Sep, 2021 (E)Continuity
  24. 24All the arrangements, with or without meaning, of the word FARMER are written excluding any word that has two R appearing together. The arra01 Sep, 2021 (E)Permutation
  25. 25A man starts walking from the point P ( - 3 , 4 ) , touches the x -axis at R , and then turns to reach at the point Q ( 0 , 2 ) , The man is01 Sep, 2021 (E)Point and Line
  26. 26Let f ( x ) = x 6 + 2 x 4 + x 3 + 2 x + 3 , x R . Then the natural number n for which lim x 1 x n f ( 1 ) - f ( x ) x - 1 = 44 is _____ .01 Sep, 2021 (E)Algebraic and Rational Limits
  27. 27Let X be a random variable with distribution. x - 2 - 1 3 4 6 P ( X = x ) 1 5 a 1 3 1 5 b If the mean of X is 2 . 3 and variance of X is 2 ,01 Sep, 2021 (E)Random Variable and its Probability Distribution
  28. 28If for the complex numbers z satisfying | z - 2 - 2 i | 1 , the maximum value of | 3 i z + 6 | is attained at a + i b , then a + b is equal 01 Sep, 2021 (E)Geometry of Complex Number
  29. 29If the sum of the coefficients in the expansion of ( x + y ) n is 4096 , then the greatest coefficient in the expansion is _____.01 Sep, 2021 (E)Terms of Binomial Expansion
  30. 30Let a = 2 i ^ - j ^ + 2 k ^ and b = i ^ + 2 j ^ - k ^ . Let a vector v be in the plane containing a and b . If v is perpendicular to the vec01 Sep, 2021 (E)Product of 2 vectors

Physics

  1. 1The temperature of an ideal gas in three dimensions is 300 K . The corresponding de-Broglie wavelength of the electron approximately at 300 01 Sep, 2021 (E)Matter Waves
  2. 2A block of mass m slides on the wooden wedge, which in turn slides backward on the horizontal surface. The acceleration of the block with re01 Sep, 2021 (E)Equilibrium of Forces
  3. 3The ranges and heights for two projectiles projected with the same initial velocity at angles 42 and 48 with the horizontal are R 1 , R 2 an01 Sep, 2021 (E)Projectile motion
  4. 4A cube is placed inside an electric field, E = 150 y 2 j ^ The side of the cube is 0 . 5 m and is placed in the field as shown in the given 01 Sep, 2021 (E)Electric Flux and Gauss Law
  5. 5Due to cold weather, a 1 m water pipe of cross-sectional area 1 cm 2 is filled with ice at - 10 C . Resistive heating is used to melt the ic01 Sep, 2021 (E)Calorimetry
  6. 6A student determined Young s Modulus of elasticity using the formula Y = M g L 3 4 bd 3 . The value of g is taken to be 9 . 8 m s - 2 withou01 Sep, 2021 (E)Errors of Measurement
  7. 7For the given circuit the current i through the battery when the key in closed and the steady state has been reached is01 Sep, 2021 (E)LR Circuit
  8. 8Following plots show Magnetization ( M ) vs Magnetising field ( H ) and Magnetic susceptibility ( ) vs Temperature ( T ) graph : Which of th01 Sep, 2021 (E)Magnetic Materials and their Properties
  9. 9A square loop of side 20 cm and resistance 1 is moved towards right with a constant speed v 0 . The right arm of the loop is in a uniform ma01 Sep, 2021 (E)Magnetic Flux, Faraday's and Lenz law
  10. 10A mass of 5 kg is connected to a spring. The potential energy curve of the simple harmonic motion executed by the system is shown in the fig01 Sep, 2021 (E)Energy of Simple Harmonic Motion
  11. 11The half life period of a radioactive element x is same as the mean life time of another radioactive element y . Initially they have the sam01 Sep, 2021 (E)Radioactivity
  12. 12A body of mass m dropped from a height h reaches the ground with a speed of 0 . 8 g h . The value of work done by the air-friction is:01 Sep, 2021 (E)Energy
  13. 13There are two infinitely long straight current-carrying conductors and they are held at right angles to each other so that their common ends01 Sep, 2021 (E)Electromagnetic Waves and Maxwell's equations
  14. 14An object of mass m is being moved with a constant velocity under the action of an applied force of 2 N along a frictionless surface with fo01 Sep, 2021 (E)Graphs of motion in one dimension
  15. 15Electric field of a plane electromagnetic wave propagating through a non-magnetic medium is given by E = 20 cos 2 10 10 t - 200 x V m - 1 . 01 Sep, 2021 (E)Combination of translation and rotation
  16. 16Four particles each of mass M , move along a circle of radius R under the action of their mutual gravitational attraction as shown in figure01 Sep, 2021 (E)Newton's Law of Gravitation
  17. 17A glass tumbler having inner depth of 17 . 5 cm is kept on a table. A student starts pouring water = 4 3 into it while looking at the surfac01 Sep, 2021 (E)Pressure and thrust
  18. 18A capacitor is connected to a 20 V battery through a resistance of 10 . It is found that the potential difference across the capacitor rises01 Sep, 2021 (E)Capacitance
  19. 19In the given figure, each diode has a forward bias resistance of 30 and infinite resistance in reverse bias. The current I 1 will be :01 Sep, 2021 (E)Diodes
  20. 20Two resistors R 1 = ( 4 0 . 8 ) and R 2 = ( 4 0 . 4 ) are connected in parallel. The equivalent resistance of their parallel combination wil01 Sep, 2021 (E)Resistance and Resistivity
  21. 21A 2 kg steel rod of length 0 . 6 m is clamped on a table vertically at its lower end and is free to rotate in the vertical plane. The upper 01 Sep, 2021 (E)Thermal Expansion
  22. 22The average translational kinetic energy of N 2 gas molecules at _ _ _ _ _ _ _ _ _ C becomes equal to the K . E . of an electron accelerated01 Sep, 2021 (E)Frictional force
  23. 23The width of one of the two slits in a Young s double slit experiment is three times the other slit. If the amplitude of the light coming fr01 Sep, 2021 (E)Thermodynamic Processes
  24. 24Two satellites revolve around a planet in coplanar circular orbits in anticlockwise direction. Their period of revolutions are 1 hour and 8 01 Sep, 2021 (E)Youngs Double Slit Experiment
  25. 25A steel rod with y = 2 . 0 10 11 N m - 2 and = 10 - 5 C - 1 of length 4 m and area of cross-section 10 cm 2 is heated from 0 C to 400 C with01 Sep, 2021 (E)Electric Power and Heating Effect of Current
  26. 26A uniform heating wire of resistance 36 is connected across a potential difference of 240 V . The wire is then cut into half and a potential01 Sep, 2021 (E)Pressure and Energy of gas
  27. 27A carrier wave with amplitude of 250 V is amplitude modulated by a sinusoidal base band signal of amplitude 150 V . The ratio of minimum amp01 Sep, 2021 (E)Modulation
  28. 28The temperature of 3 . 00 mol of an ideal diatomic gas is increased by 40 . 0 C without changing the pressure of the gas. The molecules in t01 Sep, 2021 (E)Magnetic Field
  29. 29When a body slides down from rest along a smooth inclined plane making an angle of 30 with the horizontal, it takes time T . When the same b01 Sep, 2021 (E)Kepler laws
  30. 30An engine is attached to a wagon through a shock absorber of length 1 . 5 m . The system with a total mass of 40 , 000 kg is moving with a s01 Sep, 2021 (E)Energy

Frequently Asked Questions

1.How many questions are in the JEE Main 2021 1st September 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 1st September 2021 evening shift.

4.What is the structure of the JEE Main 2021 1st September Evening Shift paper?

The JEE Main 2021 1st September 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.
5.What is the difficulty level of the JEE Main 2021 1st September Evening Shift paper?

Each question on MARKS carries a difficulty rating. Of the 90 rated questions in this paper, 22 (24%) are easy, 48 (53%) are medium and 20 (22%) are hard. Subject wise:

  • Chemistry: 11 easy, 17 medium, 2 hard
  • Mathematics: 7 easy, 13 medium, 10 hard
  • Physics: 4 easy, 18 medium, 8 hard
6.Which chapters had the most questions in the JEE Main 2021 1st September Evening Shift paper?

The chapters with the most questions in each subject were:

  • Chemistry: Aldehydes and Ketones (2), Amines (2), and Chemical Bonding and Molecular Structure (2).
  • Mathematics: Definite Integration (3), Functions (2), and Permutation Combination (2).
  • Physics: Current Electricity (2), Electromagnetic Induction (2), and Gravitation (2).
7.Are there any out-of-syllabus questions in the JEE Main 2021 1st September Evening Shift paper?

Yes. 18 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.

8.Where can I find the solutions for the JEE Main 2021 1st September 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.

9.How should I use the JEE Main 2021 1st September 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.

10.Will the JEE Main 2021 1st September 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.