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JEE Main 2021 27th August Evening Shift

Browse the complete Chemistry, Mathematics, and Physics question set from the JEE Main 2021 27th August 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 - 24 easy (27%), 47 moderate (52%) and 19 tough (21%). That's a fairly typical mix for this exam. By subject: Physics 43% easy, 40% moderate, 17% tough; Chemistry 13% easy, 67% moderate, 20% tough; Mathematics 23% easy, 50% moderate, 27% tough.

Chemistry questions were spread across 23 chapters, with Alcohols Phenols and Ethers (2), Amines (2), and Biomolecules (2) carrying the most weight. Mathematics questions were spread across 24 chapters, with Three Dimensional Geometry (3), Application of Derivatives (2), and Determinants (2) carrying the most weight. Physics questions were spread across 26 chapters, with Current Electricity (3), Semiconductors (2), and Units and Dimensions (2) carrying the most weight.

Chemistry

  1. 1The oxide that gives H 2 O 2 most readily on treatment with H 2 O is :27 Aug, 2021 (E)Compounds of Alkali Metals
  2. 2The additon of dilute NaOH to Cr 3 + salt solution will give :27 Aug, 2021 (E)Stability of complex ion
  3. 3The correct order of ionic radii for the ions, P 3 - , S 2 - , Ca 2 + , K + , Cl - is :27 Aug, 2021 (E)Periodic properties
  4. 4Choose the correct statement from the following :27 Aug, 2021 (E)General Characteristics of Alkali Metals
  5. 5The compound/s which will show significant intermolecular H -bonding is/are :27 Aug, 2021 (E)Van Der Waals Forces, Hydrogen Bonding and Metallic Bonding
  6. 6In stratosphere most of the ozone formation is assisted by :27 Aug, 2021 (E)Air Pollution
  7. 7The correct structures of A and B formed in the following reactions are :27 Aug, 2021 (E)Preparation and Properties of Amines
  8. 8Lyophilic sols are more stable than lyophobic sols because:27 Aug, 2021 (E)Colloids
  9. 9The major product of the following reaction, if it occurs by S N 2 mechanism is :27 Aug, 2021 (E)Preparation of Ethers
  10. 10Which one of the following tests used for the identification of functional groups in organic compounds does not use copper reagent?27 Aug, 2021 (E)Proteins
  11. 11The major product (A) formed in the reaction given below is :27 Aug, 2021 (E)Reactions of aromatic compounds
  12. 12Which one of the following is the major product of the given reaction?27 Aug, 2021 (E)Preparation and Properties of Cyanides
  13. 13Match List-I with List-II : List-I (Name of ore/mineral) List-I (Chemical formula) a Calamine i ZnS b Malachite ii FeCO 3 c Siderite iii ZnC27 Aug, 2021 (E)Minerals and ores
  14. 14Which one of the following chemicals is responsible for the production of HCl in the stomach leading to irritation and pain?27 Aug, 2021 (E)Drugs and It's Classification
  15. 15Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at 803 K ?27 Aug, 2021 (E)Phosphorus and Its Compounds
  16. 16Hydrolysis of sucrose gives:27 Aug, 2021 (E)Preparation and Reactions of Glucose
  17. 17Potassium permanganate on heating at 513 K gives a product which is :27 Aug, 2021 (E)Compounds of Transition Metals
  18. 18Which one of the following reactions will not yield propanoic acid?27 Aug, 2021 (E)Preparation and Properties of Carboxylic Acids
  19. 19Given below are two statements : Statement I : Ethyl pent- 4 -yn-oate on reaction with CH 3 MgBr gives a 3 -alcohol. Statement II : In this 27 Aug, 2021 (E)Preparation and Properties of Alcohols
  20. 20Which one of the following is used to remove most of plutonium from spent nuclear fuel?27 Aug, 2021 (E)F-Block elements
  21. 21The number of photons emitted by a monochromatic (single frequency) infrared range finder of power 1 mW and wavelength of 1000 nm , in 0 . 127 Aug, 2021 (E)Dual Behaviour of Matter and Heisenberg Uncertainty Principle
  22. 22Two flasks I and II shown below are connected by a valve of negligible volume. When the valve is opened, the final pressure of the system in27 Aug, 2021 (E)Gas laws and Ideal Gas Equation
  23. 23The number of species having non-pyramidal shape among the following is: A SO 3 B NO 3 - C PCl 3 D CO 3 2 -27 Aug, 2021 (E)Hybridisation and VSEPR Theory
  24. 24The first order rate constant for the decomposition of CaCO 3 at 700 K is 6 . 36 10 - 3 s - 1 and activation energy is 209 kJ mol - 1 . Its 27 Aug, 2021 (E)Arrhenius theory
  25. 25100 g of propane is completely reacted with 1000 g of oxygen. The mole fraction of carbon dioxide in the resulting mixture is x 10 - 2 . The27 Aug, 2021 (E)Concentration terms
  26. 26The resistance of conductivity cell with cell constant 1 . 14 cm - 1 , containing 0 . 001 M KCl at 298 K is 1500 . The molar conductivity of27 Aug, 2021 (E)Conductance and Conductivity
  27. 27When 5 . 1 g of solid NH 4 HS is introduced into a two litre evacuated flask at 27 C , 20 % of the solid decomposes into gaseous ammonia and27 Aug, 2021 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  28. 28The number of optical isomers possible for Cr C 2 O 4 3 3 - is:27 Aug, 2021 (E)Isomerism of coordination compounds
  29. 2940 g of glucose (Molar mass = 180 ) is mixed with 200 mL of water. The freezing point of solution is _ _K . (Nearest integer) [Given : K f =27 Aug, 2021 (E)Colligative Properties and Abnormal Molecular Masses
  30. 30Data given for the following reaction is as follows : FeO ( s ) + C ( graphite ) Fe ( s ) + CO ( g ) Substance f H kJmol - 1 S Jmol - 1 K - 27 Aug, 2021 (E)Entropy and Second law of thermodynamics

Mathematics

  1. 1The value of the integral 0 1 x d x ( 1 + x ) ( 1 + 3 x ) ( 3 + x ) is:27 Aug, 2021 (E)Definite Integration by Substitution
  2. 2The Boolean expression ( p q ) r q p is equivalent to:27 Aug, 2021 (E)Mathematical Reasoning
  3. 3A box open from top is made from a rectangular sheet of dimension a b by cutting squares each of side x from each of the four corners and fo27 Aug, 2021 (E)Maxima Minima
  4. 4If y ( x ) = cot - 1 1 + sin x + 1 - sin x 1 + sin x - 1 - sin x , x 2 , , then d y d x at x = 5 6 is:27 Aug, 2021 (E)Differentiation of Inverse Trigonometric Functions
  5. 5If lim x x 2 - x + 1 - a x = b , then the ordered pair ( a , b ) is:27 Aug, 2021 (E)Algebraic and Rational Limits
  6. 6Two poles A B of length a metres and C D of length a + b ( b a ) metres are erected at the same horizontal level with bases at B and D . If 27 Aug, 2021 (E)Heights and Distances
  7. 7Let Z be the set of all integers, A = ( x , y ) Z Z : ( x 2 ) 2 + y 2 4 B = ( x , y ) Z Z : x 2 + y 2 4 and C = ( x , y ) Z Z : ( x 2 ) 2 + 27 Aug, 2021 (E)Questions on number of relations and sets
  8. 8The equation of the plane passing through the line of intersection of the planes r ( i ^ + j ^ + k ^ ) = 1 and r ( 2 i ^ + 3 j ^ - k ^ ) + 427 Aug, 2021 (E)Plane in Space
  9. 9If the solution curve of the differential equation 2 x - 10 y 3 d y + y d x = 0 , passes through the points ( 0 , 1 ) and ( 2 , ) , then is 27 Aug, 2021 (E)Linear Differential Equation
  10. 10The set of all values of k - 1 , for which the equation 3 x 2 + 4 x + 3 2 - ( k + 1 ) 3 x 2 + 4 x + 3 3 x 2 + 4 x + 2 + k 3 x 2 + 4 x + 2 2 27 Aug, 2021 (E)Relation between Roots and Coefficients
  11. 11If two tangents drawn from a point P to the parabola y 2 = 16 ( x - 3 ) are at right angles, then the locus of point P is:27 Aug, 2021 (E)Locus
  12. 12The area of the region bounded by the parabola ( y - 2 ) 2 = ( x - 1 ) , the tangent to it at the point whose ordinate is 3 and the x -axis,27 Aug, 2021 (E)Area bounded by two curves
  13. 13Each of the persons A and B independently tosses three fair coins. The probability that both of them get the same number of heads is:27 Aug, 2021 (E)Bernoulli Trial and Binomial Distribution
  14. 14Let M and m respectively be the maximum and minimum values of the function f ( x ) = tan - 1 ( sin x + cos x ) in 0 , 2 . Then the value of 27 Aug, 2021 (E)Maxima Minima
  15. 15The angle between the straight lines, whose direction cosines l , m , n are given by the equations 2 l + 2 m - n = 0 and m n + n l + lm = 0 27 Aug, 2021 (E)Direction Cosines and Direction Ratios
  16. 16A differential equation representing the family of parabolas with axis parallel to y - axis and whose length of latus rectum is the distance27 Aug, 2021 (E)Formation of Differential Equation
  17. 17Let [ ] be the greatest integer less than or equal to . The set of all values of for which the system of linear equations x + y + z = 4 , 3 27 Aug, 2021 (E)System of Linear Equations
  18. 18If 0 x 1 and y = 1 2 x 2 + 2 3 x 3 + 3 4 x 4 + , then the value of e 1 + y at x = 1 2 is:27 Aug, 2021 (E)Summation of Series
  19. 19Let A = [ x + 1 ] [ x + 2 ] [ x + 3 ] [ x ] [ x + 3 ] [ x + 3 ] [ x ] [ x + 2 ] [ x + 4 ] , where [ x ] denotes the greatest integer less th27 Aug, 2021 (E)Expansion of Determinants
  20. 20Let A ( a , 0 ) , B ( b , 2 b + 1 ) and C ( 0 , b ) , b 0 , | b | 1 , be points such that the area of triangle A B C is 1 sq. unit, then the27 Aug, 2021 (E)Coordinate System
  21. 21Let S be the sum of all solutions (in radians) of the equation sin 4 + cos 4 - sin cos = 0 in [ 0 , 4 ] then 8 S is equal to27 Aug, 2021 (E)Solving Trigonometric Equation
  22. 22Let P a sec , b tan and Q a sec , b tan where + = 2 , be two points on the hyperbola x 2 a 2 - y 2 b 2 = 1 . If the ordinate of the point of27 Aug, 2021 (E)Normal to hyperbola
  23. 23Let S = { 1 , 2 , 3 , 4 , 5 , 6 , 9 } . Then the number of elements in the set T = { A S : A and the sum of all the elements of A is not a m27 Aug, 2021 (E)Permutation
  24. 24Two circles each of radius 5 units touch each other at the point ( 1 , 2 ) . If the equation of their common tangent is 4 x + 3 y = 10 , and27 Aug, 2021 (E)Common Tangents
  25. 253 7 22 + 2 10 22 - 44 when divided by 18 leaves the remainder27 Aug, 2021 (E)Remainder and Divisibility Problems
  26. 26An online exam is attempted by 50 candidates out of which 20 are boys. The average marks obtained by boys is 12 with a variance 2 . The vari27 Aug, 2021 (E)Measures of Dispersion
  27. 272 e x + 3 e - x 4 e x + 7 e - x d x = 1 14 u x + v log e 4 e x + 7 e - x + C , where C is a constant of integration, then u + v is equal to27 Aug, 2021 (E)Integration by Substitution
  28. 28Let z 1 and z 2 be two complex numbers such that arg z 1 - z 2 = 4 and z 1 , z 2 satisfy the equation z - 3 = Re ( z ) . Then the imaginary 27 Aug, 2021 (E)Conjugate, modulus and argument
  29. 29Let S be the mirror image of the point Q ( 1 , 3 , 4 ) with respect to the plane 2 x - y + z + 3 = 0 and let R ( 3 , 5 , ) be a point of thi27 Aug, 2021 (E)Plane in Space
  30. 30The probability distribution of random variable X is given by: X 1 2 3 4 5 P ( X ) K 2 K 2 K 3 K K Let p = P ( 1 X 4 X 3 ) . If 5 p = K , th27 Aug, 2021 (E)Random Variable and its Probability Distribution

Physics

  1. 1For full scale deflection of total 50 divisions, 50 mV voltage is required in galvanometer. The resistance of galvanometer if its current se27 Aug, 2021 (E)Electric Instruments
  2. 2For a transistor and are given as = I C I E and = I C I B . Then the correct relation between and will be:27 Aug, 2021 (E)Junction Transistors
  3. 3If the R.M.S. speed of oxygen molecules at 0 C is 160 m s - 1 . Find the R.M.S. speed of hydrogen molecules at 0 C .27 Aug, 2021 (E)Speed of Gas
  4. 4A constant magnetic field of 1 T is applied in the x 0 region. A metallic circular ring of radius 1 m is moving with a constant velocity of 27 Aug, 2021 (E)Motional and Rotational EMF
  5. 5A monochromatic neon lamp with wavelength of 670 . 5 nm illuminates a photo-sensitive material which has a stopping voltage of 0 . 48 V . Wh27 Aug, 2021 (E)Photoelectric Effect
  6. 6The colour coding on a carbon resistor is shown in the given figure. The resistance value of the given resistor is:27 Aug, 2021 (E)Color coding of resistors
  7. 7A player kicks a football with an initial speed of 25 m s - 1 at an angle of 45 from the ground. What are the maximum height and the time ta27 Aug, 2021 (E)Projectile motion
  8. 8The light waves from two coherent sources have same intensity I 1 = I 2 = I 0 . In interference pattern the intensity of light at minima is 27 Aug, 2021 (E)Youngs Double Slit Experiment
  9. 9Water drops are falling from a nozzle of a shower onto the floor from a height of 9 . 8 m . The drops fall at a regular interval of time. Wh27 Aug, 2021 (E)Motion Under Gravity
  10. 10Figure shows a rod A B , which is bent in a 120 circular arc of radius R . A charge ( - Q ) is uniformly distributed over rod AB . What is t27 Aug, 2021 (E)Electric Field and Electric Field Lines
  11. 11An antenna is mounted on a 400 m tall building. What will be the wavelength of signal that can be radiated effectively by the transmission t27 Aug, 2021 (E)Communication System
  12. 12Match List- I with List- II . List- I List- II a R H (Rydberg constant) i kg m - 1 s - 1 b h (Planck s constant) ii kg m 2 s - 1 c B (Magnet27 Aug, 2021 (E)Units
  13. 13Three capacitors C 1 = 2 F , C 2 = 6 F and C 3 = 12 F are connected as shown in the figure. Find the ratio of the charges on capacitors C 1 27 Aug, 2021 (E)Grouping of capacitors
  14. 14If force (F), length (L) and time (T) are taken as the fundamental quantities. Then what will be the dimension of density:27 Aug, 2021 (E)Dimensions
  15. 15A mass of 50 kg is placed at the center of a uniform spherical shell of mass 100 kg and radius 50 m . If the gravitational potential at a po27 Aug, 2021 (E)Gravitational potential and Potential Energy
  16. 16A coaxial cable consists of an inner wire of radius a surrounded by an outer shell of inner and outer radii b and c respectively. The inner 27 Aug, 2021 (E)Magnetic Field
  17. 17The boxes of masses 2 kg and 8 kg are connected by a massless string passing over smooth pulleys. Calculate the time taken by box of mass 8 27 Aug, 2021 (E)Equilibrium of Forces
  18. 18The height of victoria s falls is 63 m . What is the difference in the temperature of water at the top and at the bottom of the fall? [Given27 Aug, 2021 (E)Energy
  19. 19Two discs have moments of intertia I 1 and I 2 about their respective axes perpendicular to the plane and passing through the centre. They a27 Aug, 2021 (E)Angular momentum and Angular impulse
  20. 20Curved surfaces of a plano-convex lens of refractive index 1 and a plano-concave lens of refractive index 2 have equal radius of curvature a27 Aug, 2021 (E)Lens Formula, Refraction of light from curved surface
  21. 21A heat engine operates between a cold reservoir at temperature T 2 = 400 K and a hot reservoir at temperature T 1 . It takes 300 J of heat f27 Aug, 2021 (E)Heat Engine, Refrigerator and Second Law of Thermodynamics
  22. 22Wires W 1 and W 2 are made of same material having the breaking stress of 1 . 25 10 9 N m - 2 . W 1 and W 2 have cross-sectional area of 8 127 Aug, 2021 (E)Young's Modulus and Breaking Stres
  23. 23A zener diode of power rating 2 W is to be used as a voltage regulator. If the zener diode has a breakdown of 10 V and it has to regulate vo27 Aug, 2021 (E)Diodes
  24. 24A plane electromagnetic wave with a frequency of 30 MHz travels in free space. At a particular point in space and time, the electric field i27 Aug, 2021 (E)Electromagnetic Waves and Maxwell's equations
  25. 25Two simple harmonic motion, are represented by the equations y 1 = 10 sin 3 t + 3 ; y 2 = 5 ( sin 3 t + 3 cos 3 t ) Ratio of amplitude of y 27 Aug, 2021 (E)Simple Harmonic Motion
  26. 26A bullet of 10 g , moving with velocity v , collides head-on with the stationary bob of a pendulum and recoils with velocity 100 m s - 1 . T27 Aug, 2021 (E)momentum
  27. 27A tuning fork is vibrating at 250 Hz . The length of the shortest closed organ pipe that will resonate with the tuning fork will be _____ cm27 Aug, 2021 (E)Organ Pipe (Vibration of Air Column)
  28. 28An AC circuit has an inductor and a resistor of resistance R in series, such that X L = 3 R . Now, a capacitor is added in series such that 27 Aug, 2021 (E)Alternating Current, Voltage and Power
  29. 29The ratio of the equivalent resistance of the network (shown in figure) between the points a and b when switch is open and switch is closed 27 Aug, 2021 (E)Combination of Resistances
  30. 30X different wavelength may be observed in the spectrum from a hydrogen sample if the atoms are excited to states with principal quantum numb27 Aug, 2021 (E)Atomic Spectrum

Frequently Asked Questions

1.How many questions are in the JEE Main 2021 27th August 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 27th August 2021 evening shift.

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

The JEE Main 2021 27th August Morning Shift paper is listed separately - you can switch to it from the "JEE Main Paper Wise PYQs" panel, under JEE Main 27th August 2021.

5.How is the JEE Main 2021 27th August Evening Shift paper structured?

The JEE Main 2021 27th August 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.How difficult is the JEE Main 2021 27th August Evening Shift paper?

Each question on MARKS carries a difficulty rating. Of the 90 rated questions in this paper, 24 (27%) are easy, 47 (52%) are medium and 19 (21%) are hard. Subject wise:

  • Chemistry: 4 easy, 20 medium, 6 hard
  • Mathematics: 7 easy, 15 medium, 8 hard
  • Physics: 13 easy, 12 medium, 5 hard
7.Which chapters were asked the most in the JEE Main 2021 27th August Evening Shift paper?

The chapters with the most questions in each subject were:

  • Chemistry: Alcohols Phenols and Ethers (2), Amines (2), and Biomolecules (2).
  • Mathematics: Three Dimensional Geometry (3), Application of Derivatives (2), and Determinants (2).
  • Physics: Current Electricity (3), Semiconductors (2), and Units and Dimensions (2).
8.Are there any out-of-syllabus questions in the JEE Main 2021 27th August 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 27th August 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 27th August 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 27th August 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.