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JEE Main 2021 27th July Evening Shift

Browse the complete Chemistry, Mathematics, and Physics question set from the JEE Main 2021 27th 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 - 33 easy (37%), 44 moderate (49%) and 13 tough (14%). That's a fairly typical mix for this exam. By subject: Physics 27% easy, 50% moderate, 23% tough; Chemistry 47% easy, 53% moderate, 0% tough; Mathematics 37% easy, 43% moderate, 20% tough.

Chemistry questions were spread across 26 chapters, with General Organic Chemistry (3), Coordination Compounds (2), and Hydrocarbons (2) carrying the most weight. Mathematics questions were spread across 22 chapters, with Complex Number (2), Differential Equations (2), and Matrices (2) carrying the most weight. Physics questions were spread across 22 chapters, with Motion In Two Dimensions (3), Current Electricity (2), and Electrostatics (2) carrying the most weight.

Chemistry

  1. 1Which one of the following set of elements can be detected using sodium fusion extract?27 Jul, 2021 (E)Qualitative analysis of organic compounds
  2. 2Consider the above reaction, the major product P formed is :-27 Jul, 2021 (E)Reactions of Alcohols
  3. 3The number of neutrons and electrons, respectively, present in the radioactive isotope of hydrogen is :-27 Jul, 2021 (E)Preparation and Properties of Hydrogen
  4. 4Match List - I with List II : List-I List-II a Li i photoelectric cell b Na ii absorbent of CO 2 c K iii coolant in fast breeder nuclear rea27 Jul, 2021 (E)General Characteristics of Alkali Metals
  5. 5Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R . Assertion A : SO 2 ( g ) is adsorbed 27 Jul, 2021 (E)Adsorption
  6. 6The CORRECT order of first ionisation enthalpy is:27 Jul, 2021 (E)Periodic properties
  7. 7Given below are two statements : Statement I : Hyperconjugation is a permanent effect. Statement II : Hyperconjugation in ethyl cation CH 3 27 Jul, 2021 (E)Electron displacement effects
  8. 8Given below are two statements : Statement I: Mn ( CN ) 6 3 - , Fe ( CN ) 6 3 - and Co C 2 O 4 3 3 - are d 2 sp 3 hybridised. Statement II :27 Jul, 2021 (E)Crystal Field Theory
  9. 9To an aqueous solution containing ions such as Al 3 + , Zn 2 + , Ca 2 + , Fe 3 + , Ni 2 + , Ba 2 + and Cu 2 + was added conc . HCl , followe27 Jul, 2021 (E)Identification of Basic Radicals
  10. 10Given below are two statements : Statement I : Penicillin is a bacteriostatic type antibiotic. Statement II : The general structure of Penic27 Jul, 2021 (E)Drugs and It's Classification
  11. 11Compound A gives D-Galactose and D-Glucose on hydrolysis. The compound A is :27 Jul, 2021 (E)Disaccharides and Polysaccharides
  12. 12R - CN ( i ) DIBAL - H ( ii ) H 2 O R - Y Consider the above reaction and identify Y27 Jul, 2021 (E)Preparation and Properties of Cyanides
  13. 13consider the above reaction, and choose the correct statement:27 Jul, 2021 (E)Properties and Preparation of Alkenes
  14. 14Match List - I with List - II : List - I (compound) List - II (effect/affected species) a Carbon monoxide i Carcinogenic b Sulphur dioxide i27 Jul, 2021 (E)Environmental Pollution and pollutants
  15. 15If the Thomson model of the atom was correct, then the result of Rutherford s gold foil experiment would have been:27 Jul, 2021 (E)Atomic Models
  16. 16Number of Cl = O bonds in chlorous acid, chloric acid and perchloric acid respectively are:27 Jul, 2021 (E)Halogens and Its Compounds
  17. 17Select the correct statements. (A) Crystalline solids have long range order. (B) Crystalline solids are isotropic. (C) Amorphous solid are s27 Jul, 2021 (E)Properties and Types of Solids
  18. 18What is A in the following reaction?27 Jul, 2021 (E)Preparation and Properties of Monohalides
  19. 19The correct sequence of correct reagents for the following transformation is :-27 Jul, 2021 (E)Reactions of aromatic compounds
  20. 20The addition of silica during the extraction of copper from its sulphide ore :-27 Jul, 2021 (E)Extraction of Metals
  21. 21The equilibrium constant for the reaction A ( s ) M ( s ) + 1 2 O 2 ( g ) is K p = 4 . At equilibrium, the partial pressure of O 2 is _____ 27 Jul, 2021 (E)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  22. 22When 400 mL of 0 . 2 M H 2 SO 4 solution is mixed with 600 mL of 0 . 1 MNaOH solution, the increase in temperature of the final solution is 27 Jul, 2021 (E)Laws of Thermochemistry and Enthalpy Change
  23. 232 SO 2 ( g ) + O 2 ( g ) 2 SO 3 ( g ) The above reaction is carried out in a vessel starting with partial pressure P SO 2 = 250 m bar , P O 27 Jul, 2021 (E)Quantitative measures in chemical equations
  24. 2410 . 0 mL of 0 . 05 M KMnO 4 solution was consumed in a titration with 10 . 0 mL of given oxalic acid dihydrate solution. The strength of gi27 Jul, 2021 (E)Redox titration
  25. 25The total number of electrons in all bonding molecular orbitals of O 2 2 - is ......... (Round off to the nearest integer)27 Jul, 2021 (E)Molecular Orbital Theory
  26. 263 moles of metal complex with formula Co ( en ) 2 Cl 3 gives 3 moles of silver chloride on treatment with excess of silver nitrate. The seco27 Jul, 2021 (E)Werner's theory and Valence Bond Theory
  27. 27In a solvent 50 % of an acid HA dimerizes and the rest dissociates. The van t Hoff factor of the acid is _____ 10 - 2 (Round off to the near27 Jul, 2021 (E)Colligative Properties and Abnormal Molecular Masses
  28. 28The dihedral angle in staggered form of Newmann s projection of 1 , 1 , 1 -Trichloro ethane is degree. (Round off to the nearest integer) (R27 Jul, 2021 (E)Isomerism of Organic Compounds
  29. 29For the first order reaction A 2 B , 1 mole of reactant A gives 0 . 2 moles of B after 100 minutes. The half life of the reaction is ...... 27 Jul, 2021 (E)Integrated rate laws
  30. 30For the cell Cu ( s ) Cu 2 + ( aq ) ( 0 . 1 M ) Ag + ( aq ) ( 0 . 01 M ) Ag ( s ) the cell potential E 1 = 0 . 3095 V . For the cell Cu ( s 27 Jul, 2021 (E)Cells and Electrode Potential, Nernst Equation

Mathematics

  1. 1The point P a , b undergoes the following three transformations successively: a reflection about the line y = x . b translation through 2 un27 Jul, 2021 (E)Coordinate System
  2. 2A possible value of x , for which the ninth term in the expansion of 3 log 3 25 x - 1 + 7 + 3 - 1 8 log 3 5 x - 1 + 1 10 in the increasing p27 Jul, 2021 (E)Terms of Binomial Expansion
  3. 3For real numbers and 0 , if the point of intersection of the straight lines x - 1 = y - 1 2 = z - 1 3 and x - 4 = y - 6 3 = z - 7 3 lies on 27 Jul, 2021 (E)Line in Space
  4. 4Let f : R R be defined as f x + y + f x - y = 2 f x f y , f 1 2 = - 1 . Then the value of k = 1 20 1 sin k sin k + f k is equal to :27 Jul, 2021 (E)Functional Equation
  5. 5Let be the set of all complex numbers. Let S 1 = z : z - 2 1 and S 2 = z : z 1 + i + z 1 - i 4 . Then, the maximum value of z - 5 2 2 for z 27 Jul, 2021 (E)Geometry of Complex Number
  6. 6A student appeared in an examination consisting of 8 true-false type questions. The student guesses the answers with equal probability. The 27 Jul, 2021 (E)Independent Events
  7. 7If tan 9 , x , tan 7 18 are in arithmetic progression and tan 9 , y , tan 5 18 are also in arithmetic progression, then x - 2 y is equal to 27 Jul, 2021 (E)Arithmetic Progression
  8. 8Let the mean and variance of the frequency distribution x : x 1 = 2 x 2 = 6 x 3 = 8 x 4 = 9 f : 4 4 be 6 and 6 . 8 respectively. If x 3 is c27 Jul, 2021 (E)Measures of Dispersion
  9. 9The area of the region bounded by y - x = 2 and x 2 = y is equal to :-27 Jul, 2021 (E)Area bounded by two curves
  10. 10Let y = y x be the solution of the differential equation x - x 3 d y = y + y x 2 - 3 x 4 d x , x 2 If y 3 = 3 , then y 4 is equal to:27 Jul, 2021 (E)Exact Forms
  11. 11The value of lim x 0 x 1 - sin x 8 - 1 + sin x 8 is equal to :27 Jul, 2021 (E)Trigonometric and Inverse Trigonometric limits
  12. 12Two sides of a parallelogram are along the lines 4 x + 5 y = 0 and 7 x + 2 y = 0 . If the equation of one of the diagonals of the parallelog27 Jul, 2021 (E)Basic Forms of Straight Line
  13. 13Let f : 0 , 0 , 3 be a function defined by f x = max sin t : 0 t , x 0 , 2 + cos x , x . Then which of the following is true ?27 Jul, 2021 (E)Differentiability
  14. 14Let N be the set of natural numbers and a relation R on N be defined by R = x , y N N : x 3 - 3 x 2 y - x y 2 + 3 y 3 = 0 . Then the relatio27 Jul, 2021 (E)Questions on Symmetric Transitive and Reflexive Properties
  15. 15Which of the following is the negation of the statement for all M 0 , there exists x S such that x M ' ' ?27 Jul, 2021 (E)Mathematical Reasoning
  16. 16Consider a circle C which touches the y - axis at 0 , 6 and cuts off an intercept 6 5 on the x - axis. Then the radius of the circle C is eq27 Jul, 2021 (E)Equation of Circle & its intercept
  17. 17Let a , b and c be three vectors such that a = b b c . If magnitudes of the vectors a , b and c are 2 , 1 and 2 respectively and the angle b27 Jul, 2021 (E)Vector Triple Product
  18. 18Let A and B be two 3 3 real matrices such that A 2 - B 2 is invertible matrix. If A 5 = B 5 and A 3 B 2 = A 2 B 3 , then the value of the de27 Jul, 2021 (E)Inverse of a Matrix
  19. 19Let f : a , b R be twice differentiable function such that f x = a x g t d t for a differentiable function g x . If f x = 0 has exactly five27 Jul, 2021 (E)Mean Value Theorem
  20. 20Let a = i ^ - j ^ + k ^ , b = 3 i ^ + j ^ - k ^ and c = - i ^ - 2 j ^ + k ^ , where and are integers. If a b = - 1 and b c = 10 , then a b c27 Jul, 2021 (E)Product of 2 vectors
  21. 21The distance of the point P 3 , 4 , 4 from the point of intersection of the line joining the points Q 3 , - 4 , - 5 and R 2 , - 3 , 1 and th27 Jul, 2021 (E)Line in Space
  22. 22If the real part of the complex number z = 3 + 2 i cos 1 - 3 i cos , 0 , 2 is zero, then the value of sin 2 3 + cos 2 is equal to ______.27 Jul, 2021 (E)Conjugate, modulus and argument
  23. 23Let E be an ellipse whose axes are parallel to the co-ordinates axes, having its centre at 3 , - 4 , one focus at 4 , - 4 and one vertex at 27 Jul, 2021 (E)Tangent to ellipse
  24. 24If 0 sin 3 x e - sin 2 x d x = - e 0 1 t e t d t , then + is equal to27 Jul, 2021 (E)Properties of Definite Integration
  25. 25The number of real roots of the equation e 4 x - e 3 x - 4 e 2 x - e x + 1 = 0 is equal to27 Jul, 2021 (E)N degree equation
  26. 26Let y = y x be the solution of the differential equation d y = e x + y d x ; N . If y log e 2 = log e 2 and y 0 = log e 1 2 , then the value27 Jul, 2021 (E)Variable Separable Form
  27. 27Let n be a non-negative integer. Then the number of divisors of the form 4 n + 1 of the number 10 10 11 11 13 13 is equal to _____.27 Jul, 2021 (E)Selection of one or more item
  28. 28Let A = n N n 2 n + 10 , 000 , B = 3 k + 1 k N and C = 2 k k N , then the sum of all the elements of the set A B - C is equal to ________.27 Jul, 2021 (E)Questions on number of relations and sets
  29. 29If A = 1 1 1 0 1 1 0 0 1 and M = A + A 2 + A 3 + + A 20 , then the sum of all the elements of the matrix M is equal to _______.27 Jul, 2021 (E)Product of Matrices
  30. 30Let = max x R 8 2 sin 3 x 4 4 cos 3 x and = min x R 8 2 sin 3 x 4 4 cos 3 x . If 8 x 2 + b x + c = 0 is a quadratic equation whose roots are27 Jul, 2021 (E)Relation between Roots and Coefficients

Physics

  1. 1An electron and proton are separated by a large distance. The electron starts approaching the proton with energy 3 eV . The proton captures 27 Jul, 2021 (E)Photoelectric Effect
  2. 2The expected graphical representation of the variation of angle of deviation with angle of incidence i in a prism is :27 Jul, 2021 (E)Prism and Dispersion of Light
  3. 3A raindrop with radius R = 0 . 2 mm falls from a cloud at a height h = 2000 m above the ground. Assume that the drop is spherical throughout27 Jul, 2021 (E)Viscosity
  4. 4One mole of an ideal gas is taken through an adiabatic process where the temperature rises from 27 C to 37 C . If the ideal gas is composed 27 Jul, 2021 (E)Thermodynamic Processes
  5. 5An object of mass 0 . 5 kg is executing simple harmonic motion. It amplitude is 5 cm and time period (T) is 0 . 2 s . What will be the poten27 Jul, 2021 (E)Simple Harmonic Motion
  6. 6Match List I with List II. List-I List-II a Capacitance, C i M 1 L 1 T - 3 A - 1 b Permittivity of free space, 0 ii M - 1 L - 3 T 4 A 2 c Pe27 Jul, 2021 (E)Dimensions
  7. 7Given below is the plot of a potential energy function U ( x ) for a system, in which a particle is in one dimensional motion, while a conse27 Jul, 2021 (E)Energy
  8. 8A 100 resistance, a 0 . 1 F capacitor and an inductor are connected in series across a 250 V supply at variable frequency. Calculate the val27 Jul, 2021 (E)AC Circuits
  9. 9A simple pendulum of mass m , length l and charge + q suspended in the electric field produced by two conducting parallel plates as shown. T27 Jul, 2021 (E)Electric Field and Electric Field Lines
  10. 10Two Carnot engines A and B operate in series such that engine A absorbs heat at T 1 and rejects heat to a sink at temperature T . Engine B a27 Jul, 2021 (E)Heat Engine, Refrigerator and Second Law of Thermodynamics
  11. 11Find the truth table for the function Y of A and B represented in the following figure.27 Jul, 2021 (E)Logic gates
  12. 12Figure A and B shown two long straight wires of circular cross-section ( a and b with a b ), carrying current I which is uniformly distribut27 Jul, 2021 (E)Magnetic Field
  13. 13Two identical particles of mass 1 kg each go round a circle of radius R , under the action of their mutual gravitational attraction. The ang27 Jul, 2021 (E)Motion of satellite
  14. 14Consider the following statements: A . Atoms of each element emit characteristics spectrum. B . According to Bohr s Postulate, an electron i27 Jul, 2021 (E)Nuclear structure
  15. 15What will be the magnitude of the electric field at point O as shown in the figure? Each side of the figure is l and perpendicular to the ot27 Jul, 2021 (E)Electric Field and Electric Field Lines
  16. 16A physical quantity y is represented by the formula y = m 2 r - 4 g x l - 3 2 If the percentage errors found in y , m , r , l and g are 18 ,27 Jul, 2021 (E)Errors of Measurement
  17. 17An automobile of mass m accelerates starting from the origin and initially at rest, while the engine supplies constant power P . The positio27 Jul, 2021 (E)Power
  18. 18The planet Mars has two moons, if one of them has a period 7 hours, 30 minutes and an orbital radius of 9 . 0 10 3 km . Find the mass of Mar27 Jul, 2021 (E)Newton's Law of Gravitation
  19. 19A particle of mass M originally at rest is subjected to a force whose direction is constant but magnitude varies with time according to the 27 Jul, 2021 (E)Uniform Motion
  20. 20The resistance of a conductor at 15 C is 16 and at 100 C is 20 . What will be the temperature coefficient of resistance of the conductor?27 Jul, 2021 (E)Resistance and Resistivity
  21. 21In the given figure, two wheels P and Q are connected by a belt B . The radius of P is three times that of Q . In the case of the same rotat27 Jul, 2021 (E)Moment of inertia of rigid bodies
  22. 22The difference in the number of waves when yellow light propagates through air and vacuum columns of the same thickness is one. The thicknes27 Jul, 2021 (E)Diffraction of Light
  23. 23The maximum amplitude for an amplitude modulated wave is found to be 12 V while the minimum amplitude is found to be 3 V . The modulation in27 Jul, 2021 (E)Modulation
  24. 24In the given figure the magnetic flux through the loop increases according to the relation B ( t ) = 10 t 2 + 20 t , where B is in milliwebe27 Jul, 2021 (E)Magnetic Flux, Faraday's and Lenz law
  25. 25A particle executes simple harmonic motion represented by displacement function as x ( t ) = A sin ( t + ) . If the position and velocity of27 Jul, 2021 (E)Simple Harmonic Motion
  26. 26A swimmer wants to cross a river from point A to point B . Line AB makes an angle of 30 with the flow of the river. The magnitude of the vel27 Jul, 2021 (E)Relative motion
  27. 27For the circuit shown, the value of current at time t = 3 . 2 s will be ______ A . [Voltage distribution V ( t ) is shown by Fig. ( 1 ) and 27 Jul, 2021 (E)Electric Current and Drift of Electrons
  28. 28A small block slides down from the top of hemisphere of radius R = 3 m as shown in the figure. The height h at which the block will lose con27 Jul, 2021 (E)Projectile motion
  29. 29The K X-ray of molybdenum has wavelength 0 . 071 nm . If the energy of a molybdenum atom with a K electron knocked out is 27 . 5 keV , the e27 Jul, 2021 (E)Bohr's Atomic Model
  30. 30The water is filled up to a height of 12 m in a tank having vertical sidewalls. A hole is made in one of the walls at a depth h below the wa27 Jul, 2021 (E)Projectile motion

Frequently Asked Questions

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

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

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

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

The JEE Main 2021 27th 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 27th July Evening Shift paper?

Each question on MARKS carries a difficulty rating. Of the 90 rated questions in this paper, 33 (37%) are easy, 44 (49%) are medium and 13 (14%) are hard. Subject wise:

  • Chemistry: 14 easy, 16 medium, 0 hard
  • Mathematics: 11 easy, 13 medium, 6 hard
  • Physics: 8 easy, 15 medium, 7 hard
7.Which chapters were asked the most in the JEE Main 2021 27th July Evening Shift paper?

The chapters with the most questions in each subject were:

  • Chemistry: General Organic Chemistry (3), Coordination Compounds (2), and Hydrocarbons (2).
  • Mathematics: Complex Number (2), Differential Equations (2), and Matrices (2).
  • Physics: Motion In Two Dimensions (3), Current Electricity (2), and Electrostatics (2).
8.Are there any out-of-syllabus questions in the JEE Main 2021 27th July Evening Shift paper?

Yes. 15 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 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 27th 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 27th 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.