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JEE Main 2021 25th July Evening Shift

Browse the complete Chemistry, Mathematics, and Physics question set from the JEE Main 2021 25th July 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 - 37 easy (41%), 43 moderate (48%) and 10 tough (11%). 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 33% easy, 50% moderate, 17% tough; Chemistry 47% easy, 50% moderate, 3% tough; Mathematics 43% easy, 43% moderate, 13% tough.

Chemistry questions were spread across 25 chapters, with General Organic Chemistry (3), Amines (2), and Chemical Bonding and Molecular Structure (2) carrying the most weight. Mathematics questions were spread across 18 chapters, with Binomial Theorem (6), Vector Algebra (3), and Application of Derivatives (2) carrying the most weight. Physics questions were spread across 20 chapters, with Current Electricity (3), Dual Nature of Matter (3), and Motion In One Dimension (3) carrying the most weight.

Chemistry

  1. 1In the following the correct bond order sequence is:25 Jul, 2021 (E)Molecular Orbital Theory
  2. 2A biodegradable polyamide can be made from:25 Jul, 2021 (E)Preparation and Properties of Polymers
  3. 3Match List I with List II : List-I Elements List-II Properties (a) Li (i) Poor water solubility of I - salt (b) Na (ii) Most abundant elemen25 Jul, 2021 (E)General Characteristics of Alkali Metals
  4. 4Which one of the following metal complexes is most stable?25 Jul, 2021 (E)Terminology of coordination compounds
  5. 5Match List I with List II : (Both having metallurgical terms) List-I List-II (a) Concentration of Ag ore (i) Reverberatory furnace (b) Blast25 Jul, 2021 (E)Concentration of the Ore
  6. 6The ionic radii of F - and O 2 - respectively are 1 . 33 A and 1 . 4 A , while the covalent radius of N is 0 . 74 A The correct statement fo25 Jul, 2021 (E)Periodic properties
  7. 7The correct decreasing order of densities of the following compounds is :25 Jul, 2021 (E)Classification of organic compounds
  8. 8Consider the above reaction, the Product P is :25 Jul, 2021 (E)Preparation and Properties of Amines
  9. 9A reaction of benzonitrile with one equivalent CH 3 MgBr followed by hydrolysis produces a yellow liquid P . The compound P will give positi25 Jul, 2021 (E)Preparation and Properties of Cyanides
  10. 10The spin only magnetic moments (in BM) for free Ti 3 + , V 2 + and Sc 3 + ions respectively are (At.No. Sc : 21 , Ti : 22 , V : 23 )25 Jul, 2021 (E)Quantum mechanical model
  11. 11Which one of the following is correct structure for cytosine ?25 Jul, 2021 (E)Properties and Preparation of Amino Acids
  12. 12Identify the species having one -bond and maximum number of canonical forms from the following :25 Jul, 2021 (E)Covalent and Co-ordinate Bonding
  13. 13Which one of the following metals forms interstitial hydride easily ?25 Jul, 2021 (E)Hydrides
  14. 14Maleic anhydride Maleic anhydride can be prepared by :25 Jul, 2021 (E)Preparation and Properties of Acid Derivatives
  15. 15Given below are two statements : Statement I : Chlorofluoro carbons breakdown by radiation in the visible energy region and release chlorine25 Jul, 2021 (E)Air Pollution
  16. 16Consider the above reaction sequence, Product A and Product B formed respectively are:25 Jul, 2021 (E)Preparation and Properties of Monohalides
  17. 17Match List I with List II : List-I List-II Example of colloids Classification (a) Cheese (i) dispersion of liquid in liquid (b) Pumice stone25 Jul, 2021 (E)Colloids
  18. 18What is the major product P of the following reaction ?25 Jul, 2021 (E)Reactions of Alcohols
  19. 19Identify the process in which change in the oxidation state is five :25 Jul, 2021 (E)Oxidation number
  20. 20Which among the following is the strongest acid?25 Jul, 2021 (E)Conjugation and Aromaticity
  21. 21A system does 200 J of work and at the same time absorbs 150 J of heat. The magnitude of the change in internal energy is ______ J . (Neares25 Jul, 2021 (E)First Law and Basic Fundamentals of Thermodynamics
  22. 22An accelerated electron has a speed of 5 10 6 ms - 1 with an uncertainty of 0 . 02 % . The uncertainty in finding its location while in moti25 Jul, 2021 (E)Dual Behaviour of Matter and Heisenberg Uncertainty Principle
  23. 23Number of electrons present in 4 f orbital of Ho 3 + ion is ________ (Given Atomic No. of Ho =67)25 Jul, 2021 (E)F-Block elements
  24. 24Consider the above chemical reaction. The total number of stereoisomers possible for Product P is _________25 Jul, 2021 (E)Reactions of alkenes
  25. 25For a chemical reaction A B , it was found that concentration of B is increased by 0 . 2 mol L - 1 in 30 min. The average rate of the reacti25 Jul, 2021 (E)Rate of reaction
  26. 26The number of significant figures in 0 . 00340 is _________25 Jul, 2021 (E)Significant Figures
  27. 27Assuming that Ba ( OH ) 2 is completely ionised in aqueous solution under the given conditions the concentration of H 3 O + ions in 0 . 005 25 Jul, 2021 (E)Ionic Product of Water
  28. 280 . 8 g of an organic compound was analysed by Kjeldahl s method for the estimation of nitrogen. If the percentage of nitrogen in the compou25 Jul, 2021 (E)Quantitative analysis of organic compounds
  29. 29When 3 . 00 g of a substance X is dissolved in 100 g of CCl 4 , it raises the boiling point by 0 . 60 K . The molar mass of the substance X 25 Jul, 2021 (E)Colligative Properties and Abnormal Molecular Masses
  30. 30An LPG cylinder contains gas at a pressure of 300 kPa at 27 C . The cylinder can withstand the pressure of 1 . 2 10 6 Pa . The room in which25 Jul, 2021 (E)Gas laws and Ideal Gas Equation

Mathematics

  1. 1The sum of all those terms which are rational numbers in the expansion of 2 1 3 + 3 1 4 12 is:25 Jul, 2021 (E)Terms of Binomial Expansion
  2. 2The first of the two samples in a group has 100 items with mean 15 and standard deviation 3 . If the whole group has 250 items with mean 15 25 Jul, 2021 (E)Measures of Dispersion
  3. 3If f x = 0 x 5 + 1 - t d t , x 2 5 x + 1 , x 2 , then25 Jul, 2021 (E)Differentiability
  4. 4If the greatest value of the term independent of x in the expansion of x sin + a cos x 10 is 10 ! 5 ! 2 , then the value of a is equal to:25 Jul, 2021 (E)Terms of Binomial Expansion
  5. 5Consider the statement The match will be played only if the weather is good and ground is not wet . Select the correct negation from the fol25 Jul, 2021 (E)Mathematical Reasoning
  6. 6The value of cot 24 is:25 Jul, 2021 (E)Sum and Difference & Multiple angle Formula
  7. 7The lowest integer which is greater than 1 + 1 10 100 10 100 is25 Jul, 2021 (E)Comparison between two numbers
  8. 8The value of the integral - 1 1 log x + x 2 + 1 d x is:25 Jul, 2021 (E)Properties of Definite Integration
  9. 9Let a , b and c be distinct positive numbers. If the vectors a i ^ + a j ^ + c k ^ , i ^ + k ^ and c i ^ + c j ^ + b k ^ are co-planar, then25 Jul, 2021 (E)Algebra of Vectors
  10. 10If x be the greatest integer less than or equal to x , then n = 8 100 - 1 n n 2 is equal to:25 Jul, 2021 (E)Periodicity
  11. 11If a = 2 , b = 5 and a b = 8 , then a b is equal to:25 Jul, 2021 (E)Product of 2 vectors
  12. 12The number of real solutions of the equation, x 2 - x - 12 = 0 is:25 Jul, 2021 (E)Relation between Roots and Coefficients
  13. 13Consider function f : A B and g : B C A , B , C R such that g o f - 1 exists, then:25 Jul, 2021 (E)Types of Function (Mapping)
  14. 14If P = 1 0 1 2 1 , then P 50 is:25 Jul, 2021 (E)Product of Matrices
  15. 15Let X be a random variable such that the probability function of a distribution is given by P X = 0 = 1 2 , P X = j = 1 3 j j = 1 , 2 , 3 , 25 Jul, 2021 (E)Random Variable and its Probability Distribution
  16. 16If a tangent to the ellipse x 2 + 4 y 2 = 4 meets the tangents at the extremities of its major axis at B and C , then the circle with B C as25 Jul, 2021 (E)Tangent to ellipse
  17. 17Let the equation of the pair of lines, y = p x and y = q x , can be written as y - p x y - q x = 0 . Then the equation of the pair of the an25 Jul, 2021 (E)Pair of Lines
  18. 18If P r n = P r + 1 n and C r n = C r - 1 n , then the value of r is equal to:25 Jul, 2021 (E)Properties of Binomial Coefficients
  19. 19Let y = y x be the solution of the differential equation x d y = y + x 3 cos x d x with y = 0 , then y 2 is equal to:25 Jul, 2021 (E)Exact Forms
  20. 20Let n N and x denote the greatest integer less than or equal to x . If the sum of n + 1 terms of C 0 n , 3 C 1 n , 5 C 2 n , 7 C 3 n , is eq25 Jul, 2021 (E)Sum of Series
  21. 21Consider the function f x = P x sin x - 2 , x 2 , and f x = 7 , x = 2 where P x is a polynomial such that P x is always a constant and P 3 =25 Jul, 2021 (E)Continuity
  22. 22The equation of a circle is Re z 2 + 2 Im z 2 + 2 Re z = 0 , where z = x + i y . A line which passes through the centre of the given circle 25 Jul, 2021 (E)Geometry of Complex Number
  23. 23If a rectangle is inscribed in an equilateral triangle of side length 2 2 as shown in the figure, then the square of the largest area of suc25 Jul, 2021 (E)Maxima Minima
  24. 24If a and b are unit vectors and a + 3 b is perpendicular to 7 a - 5 b and a - 4 b is perpendicular to 7 a - 2 b , then the angle between a a25 Jul, 2021 (E)Product of 2 vectors
  25. 25Let a curve y = f x pass through the point 2 , log e 2 2 and have slope 2 y x log e x for all positive real values of x . Then the value of 25 Jul, 2021 (E)Tangent Normal
  26. 26A fair coin is tossed n - times such that the probability of getting at least one head is at least 0 . 9 . Then the minimum value of n is __25 Jul, 2021 (E)Total Probability
  27. 27If the co-efficient of x 7 and x 8 in the expansion of 2 + x 3 n are equal, then the value of n is equal to :25 Jul, 2021 (E)Terms of Binomial Expansion
  28. 28If the lines x - k 1 = y - 2 2 = z - 3 3 and x + 1 3 = y + 2 2 = z + 3 1 are co-planar, then the value of k is _______.25 Jul, 2021 (E)Line and Plane
  29. 29If a + b + c = 1 , a b + b c + c a = 2 and a b c = 3 , then the value of a 4 + b 4 + c 4 is equal to:25 Jul, 2021 (E)Relation between Roots and Coefficients
  30. 30The number of distinct real roots of sin x cos x cos x cos x sin x cos x cos x cos x sin x = 0 in the interval - 4 x 4 is:25 Jul, 2021 (E)Solving Trigonometric Equation

Physics

  1. 1The relation between time t and distance x for a moving body is given as t = m x 2 + n x , where m and n are constants. The retardation of t25 Jul, 2021 (E)Rest and Motion
  2. 2In a simple harmonic oscillation, what fraction of total mechanical energy is in the form of kinetic energy, when the particle is midway bet25 Jul, 2021 (E)Energy of Simple Harmonic Motion
  3. 3A force F = ( 40 i ^ + 10 j ^ ) N acts on a body of mass 5 kg . If the body starts from rest, its position vector r at time t = 10 s will be25 Jul, 2021 (E)Newton's laws of motion
  4. 4A prism of refractive index and angle of prism A is placed in the position of minimum angle of deviation. If minimum angle of deviation is a25 Jul, 2021 (E)Prism and Dispersion of Light
  5. 5A heat engine has an efficiency of 1 6 . When the temperature of sink is reduced by 62 C , its efficiency get doubled. The temperature of th25 Jul, 2021 (E)Heat Engine, Refrigerator and Second Law of Thermodynamics
  6. 6In the given potentiometer circuit arrangement, the balancing length AC is measured to be 250 cm . When the galvanometer connection is shift25 Jul, 2021 (E)Electric Instruments
  7. 7Two ions having same mass have charges in the ratio 1 : 2 . They are projected normally in a uniform magnetic field with their speeds in the25 Jul, 2021 (E)Motion of Charged Particle in Magnetic Field
  8. 8A 10 resistance is connected across 220 V - 50 Hz AC supply. The time taken by the current to change from its maximum value to the rms value25 Jul, 2021 (E)Alternating Current, Voltage and Power
  9. 9A balloon was moving upwards with a uniform velocity of 10 m s - 1 . An object of finite mass is dropped from the balloon when it was at a h25 Jul, 2021 (E)Motion Under Gravity
  10. 10If q f is the free charge on the capacitor plates and q b is the bound charge on the dielectric slab of dielectric constant k placed between25 Jul, 2021 (E)Capacitors with Dielectric
  11. 11Consider a planet in some solar system that has a mass double the mass of earth and density equal to the average density of the earth. If th25 Jul, 2021 (E)Acceleration Due to Gravity
  12. 12Two ideal electric dipoles A and B , having their dipole moment p 1 and p 2 respectively are placed on a plane with their centres at O as sh25 Jul, 2021 (E)Electric Dipole
  13. 13Two spherical soap bubbles of radii r 1 and r 2 in vacuum combine under isothermal conditions. The resulting bubble has a radius equal to:25 Jul, 2021 (E)Pressure and Energy of gas
  14. 14The force is given in terms of time t and displacement x by the equation F = A cos B x + C sin D t The dimensional formula of A D B is:25 Jul, 2021 (E)Dimensions
  15. 15The given potentiometer has its wire of resistance 10 . When the sliding contact is in the middle of the potentiometer wire, the potential d25 Jul, 2021 (E)Electric Instruments
  16. 16An electron moving with speed v and a photon moving with speed c , have the same D-Broglie wavelength. The ratio of the kinetic energy of th25 Jul, 2021 (E)Matter Waves
  17. 17The instantaneous velocity of a particle moving in a straight line is given as v = t + t 2 , where and are constants. The distance travelled25 Jul, 2021 (E)Rest and Motion
  18. 18A ray of light entering from air into a denser medium of refractive index 4 3 , as shown in figure. The light ray suffers total internal ref25 Jul, 2021 (E)Critical angle and total internal reflection
  19. 19When radiation of wavelength is incident on a metallic surface, the stopping potential of ejected photoelectrons is 4 . 8 V . If the same su25 Jul, 2021 (E)Photoelectric Effect
  20. 20Two vectors X and Y have equal magnitude. The magnitude of ( X - Y ) is n times the magnitude of ( X + Y ) . The angle between X and Y is :25 Jul, 2021 (E)Fundamentals of Vectors
  21. 21A system consists of two types of gas molecules A and B having the same number density 2 10 25 m - 3 . The diameter of A and B are 10 A and 25 Jul, 2021 (E)Pressure and Energy of gas
  22. 22A light beam of wavelength 500 nm is incident on a metal having work function of 1 . 25 eV , placed in a magnetic field of intensity B . The25 Jul, 2021 (E)Photoelectric Effect
  23. 23A message signal of frequency 20 kHz and peak voltage of 20 V is used to modulate a carrier wave of frequency 1 MHz and peak voltage of 20 V25 Jul, 2021 (E)Modulation
  24. 24A 16 wire is bent to form a square loop. A 9 V supply having an internal resistance of 1 is connected across one of its sides. The potential25 Jul, 2021 (E)Kirchoffs Laws
  25. 25Two circuits are shown in figure ( a ) and ( b ) . At a frequency of _______ rad s - 1 the average power dissipated in one cycle will be the25 Jul, 2021 (E)AC Circuits
  26. 26From the given data, the amount of energy required to break the nucleus of aluminium Al 13 27 is __________ x 10 - 3 J Mass of neutron = 1 .25 Jul, 2021 (E)Nuclear energy
  27. 27A force of F = ( 5 y + 20 ) j ^ N acts on a particle. The work done by this force when the particle is moved from y = 0 m to y = 10 m is ___25 Jul, 2021 (E)Work done
  28. 28A solid disc of radius 20 cm and mass 10 kg is rotating with an angular velocity of 600 rpm , about an axis normal to its circular plane and25 Jul, 2021 (E)Moment of inertia of rigid bodies
  29. 29In a semiconductor, the number density of intrinsic charge carriers at 27 C is 1 . 5 10 16 m - 3 . If the semiconductor is doped with an imp25 Jul, 2021 (E)Semiconductors
  30. 30The nuclear activity of a radioactive element becomes 1 8 th of its initial value in 30 years. The half-life of radioactive element is _____25 Jul, 2021 (E)Radioactivity

Frequently Asked Questions

1.How many questions are in the JEE Main 2021 25th July 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 25th July 2021 evening shift.

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

The JEE Main 2021 25th July Morning Shift paper is listed separately - you can switch to it from the "JEE Main Paper Wise PYQs" panel, under JEE Main 25th July 2021.

5.How is the JEE Main 2021 25th July Evening Shift paper structured?

The JEE Main 2021 25th July 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 25th July Evening Shift paper?

Each question on MARKS carries a difficulty rating. Of the 90 rated questions in this paper, 37 (41%) are easy, 43 (48%) are medium and 10 (11%) are hard. Subject wise:

  • Chemistry: 14 easy, 15 medium, 1 hard
  • Mathematics: 13 easy, 13 medium, 4 hard
  • Physics: 10 easy, 15 medium, 5 hard
7.Which chapters were asked the most in the JEE Main 2021 25th July Evening Shift paper?

The chapters with the most questions in each subject were:

  • Chemistry: General Organic Chemistry (3), Amines (2), and Chemical Bonding and Molecular Structure (2).
  • Mathematics: Binomial Theorem (6), Vector Algebra (3), and Application of Derivatives (2).
  • Physics: Current Electricity (3), Dual Nature of Matter (3), and Motion In One Dimension (3).
8.Are there any out-of-syllabus questions in the JEE Main 2021 25th July Evening 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 25th July 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 25th July 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 25th July 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.