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JEE Main 2021 27th August Morning Shift

Browse the complete Chemistry, Mathematics, and Physics question set from the JEE Main 2021 27th August Morning 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%), 46 moderate (51%) and 20 tough (22%). That's a fairly typical mix for this exam. By subject: Physics 30% easy, 57% moderate, 13% tough; Chemistry 23% easy, 53% moderate, 23% tough; Mathematics 27% easy, 43% moderate, 30% tough.

Chemistry questions were spread across 25 chapters, with Aldehydes and Ketones (3), Coordination Compounds (2), and General Organic Chemistry (2) carrying the most weight. Mathematics questions were spread across 25 chapters, with Application of Derivatives (2), Definite Integration (2), and Differential Equations (2) carrying the most weight. Physics questions were spread across 23 chapters, with Current Electricity (2), Magnetic Effects of Current (2), and Ray Optics (2) carrying the most weight.

Chemistry

  1. 1Which refining process is generally used in the purification of low melting metals?27 Aug, 2021 (M)Refining of Crude Metal
  2. 2Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Synthesis of ethy27 Aug, 2021 (M)Preparation of Ethers
  3. 3In which one of the following molecules strongest back donation of an electron pair from halide to boron is expected?27 Aug, 2021 (M)Boron and Its Compounds
  4. 4In the following sequence of reactions the P is:27 Aug, 2021 (M)Preparation and Properties of Monohalides
  5. 5The unit of the van der Waals gas equation parameter ' a ' in P + an 2 V 2 ( V - nb ) = nRT is:27 Aug, 2021 (M)Real Gases and Van der Waal's Equation
  6. 6The gas ' A ' is having very low reactivity reaches to stratosphere. It is non-toxic and non-flammable but dissociated by UV -radiations in 27 Aug, 2021 (M)Air Pollution
  7. 7The structure of the starting compound P used in the reaction given below is:27 Aug, 2021 (M)Chemical reactions for aldehydes and ketones
  8. 8Which of the following is not a correct statement for primary aliphatic amines?27 Aug, 2021 (M)Preparation and Properties of Amines
  9. 9Deuterium resembles hydrogen in properties but:27 Aug, 2021 (M)Preparation and Properties of Hydrogen
  10. 10The nature of oxides V 2 O 3 and CrO is indexed as ' X ' and ' Y ' type respectively. The correct set of X and Y is:27 Aug, 2021 (M)Properties of D-block elements
  11. 11Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a Prussian blue coloured colloidal species. It is:27 Aug, 2021 (M)Crystal Field Theory
  12. 12Match List - I with List - II: List-I (Species) List-II (Number of lone pairs of electrons on the central atom) (a) XeF 2 (i) 0 (b) XeO 2 F 27 Aug, 2021 (M)Noble Gases
  13. 13Match List - I with List - II: List-I (Property) List-II (Example) (a) Diamagnetism (i) MnO (b) Ferrimagnetism (ii) O 2 (c) Paramagnetism (i27 Aug, 2021 (M)Electrical and Magnetic properties
  14. 14In polythionic acid, H 2 S x O 6 ( x = 3 to 5 ) the oxidation state(s) of sulphur is/are:27 Aug, 2021 (M)Oxidation number
  15. 15Out of following isomeric forms of uracil, which one is present in RNA?27 Aug, 2021 (M)Nucleic Acids
  16. 16The major product of the following reaction is:27 Aug, 2021 (M)Chemical reactions for aldehydes and ketones
  17. 17In the following sequence of reactions, the final product D is:27 Aug, 2021 (M)Method of preparation for both aldehydes and ketones
  18. 18Tyndall effect is more effectively shown by:27 Aug, 2021 (M)Properties of colloidal solution
  19. 19A B C D The correct statement about (A), (B), (C) and (D) is:27 Aug, 2021 (M)Drugs and It's Classification
  20. 20The number of water molecules in gypsum, dead burnt plaster and plaster of Paris, respectively are:27 Aug, 2021 (M)Compounds of Alkaline Earth Metals
  21. 211 mol of an octahedral metal complex with formula MCl 3 2 L on reaction with excess of AgNO 3 gives 1 mol of AgCl . The denticity of Ligand 27 Aug, 2021 (M)Terminology of coordination compounds
  22. 22In Carius method for estimation of halogens, 0 . 2 g of an organic compound gave 0 . 188 g of AgBr . The percentage of bromine in the compou27 Aug, 2021 (M)F-Block elements
  23. 23The number of f electrons in the ground state electronic configuration of Np ( Z = 93 ) is ______ .(Integer answer)27 Aug, 2021 (M)First Law and Basic Fundamentals of Thermodynamics
  24. 24200 mL of 0 . 2 M HCl is mixed with 300 mL of 0 . 1 M NaOH . The molar heat of neutralization of this reaction is - 57 . 1 kJ . The increase27 Aug, 2021 (M)Colligative Properties and Abnormal Molecular Masses
  25. 251 kg of 0 . 75 molal aqueous solution of sucrose can be cooled up to - 4 C before freezing. The amount of ice (in g ) that will be separated27 Aug, 2021 (M)Dual Behaviour of Matter and Heisenberg Uncertainty Principle
  26. 26The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is equal to h 2 x ma 0 2 . The value of 10 x is ( a 0 is radiu27 Aug, 2021 (M)Rate of reaction
  27. 27The reaction that occurs in a breath analyser, a device used to determine the alcohol level in a person s blood stream is 2 K 2 Cr 2 O 7 + 827 Aug, 2021 (M)Concentration terms
  28. 28When 10 mL of an aqueous solution of KMnO 4 was titrated in acidic medium, equal volume of 0 . 1 M of an aqueous solution of ferrous sulphat27 Aug, 2021 (M)Quantitative analysis of organic compounds
  29. 29The number of moles of NH 3 , that must be added to 2 L of 0 . 80 MAgNO 3 in order to reduce the concentration of Ag + ions to 5 . 0 10 - 8 27 Aug, 2021 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  30. 30The number of moles of CuO , that will be utilized in Dumas method for estimating nitrogen in a sample of 57 . 5 g of N , N - dimethylaminop27 Aug, 2021 (M)Quantitative analysis of organic compounds

Mathematics

  1. 1Let A be a fixed point ( 0 , 6 ) and B be a moving point ( 2 t , 0 ) . Let M be the mid-point of A B and the perpendicular bisector of A B m27 Aug, 2021 (M)Locus
  2. 2The distance of the point 1 , - 2 , 3 from the plane x - y + z = 5 measured parallel to a line, whose direction ratios are 2 , 3 , - 6 , is27 Aug, 2021 (M)Line and Plane
  3. 3If sin - 1 x 2 - cos - 1 x 2 = a ; 0 x 1 , a 0 , then the value of 2 x 2 - 1 is27 Aug, 2021 (M)Sum of complementary angles
  4. 4If x 2 + 9 y 2 - 4 x + 3 = 0 , x , y R , then x and y respectively lie in the intervals27 Aug, 2021 (M)Range of Quadratic Function
  5. 5The statement ( p ( p q ) ( q r ) ) r is27 Aug, 2021 (M)Mathematical Reasoning
  6. 6If U n = 1 + 1 n 2 1 + 2 2 n 2 2 1 + n 2 n 2 n , then lim n U n - 4 n 2 is equal to27 Aug, 2021 (M)Definite as Limit of Sum
  7. 76 16 log e x 2 log e x 2 + log e x 2 - 44 x + 484 d x is equal to27 Aug, 2021 (M)Properties of Definite Integration
  8. 8If the matrix A = 0 2 K - 1 satisfies A A 3 + 3 I = 2 I , then the value of K is27 Aug, 2021 (M)Product of Matrices
  9. 9When a certain biased die is rolled, a particular face occurs with probability 1 6 - x and its opposite face occurs with probability 1 6 + x27 Aug, 2021 (M)Total Probability
  10. 10A wire of length 20 m is to be cut into two pieces. One of the pieces is to be made into a square and the other into a regular hexagon. Then27 Aug, 2021 (M)Maxima Minima
  11. 11If for x , y R , x 0 , y = log 10 x + log 10 x 1 / 3 + log 10 x 1 / 9 + upto terms and 2 + 4 + 6 + + 2 y 3 + 6 + 9 + + 3 y = 4 log 10 x , th27 Aug, 2021 (M)Mixed Question on AP and GP
  12. 12Let us consider a curve, y = f x passing through the point - 2 , 2 and the slope of the tangent to the curve at any point ( x , f ( x ) ) is27 Aug, 2021 (M)Linear Differential Equation
  13. 13A tangent and a normal are drawn at the point P ( 2 , - 4 ) on the parabola y 2 = 8 x , which meet the directrix of the parabola at the poin27 Aug, 2021 (M)Normal to Parabola
  14. 14Let y = y ( x ) be the solution of the differential equation d y d x = 2 y + 2 sin x - 5 x - 2 cos x such that y ( 0 ) = 7 . Then y ( ) is e27 Aug, 2021 (M)Linear Differential Equation
  15. 15If , are the distinct roots of x 2 + b x + c = 0 , then lim x e 2 x 2 + b x + c - 1 - 2 x 2 + b x + c ( x - ) 2 is equal to27 Aug, 2021 (M)Miscellaneous
  16. 16Equation of a plane at a distance 2 21 units from the origin, which contains the line of intersection of the planes x - y - z - 1 = 0 and 2 27 Aug, 2021 (M)Plane in Space
  17. 17Let sin A sin B = sin ( A - C ) sin ( C - B ) , where A , B , C are angles of a triangle A B C . If the lengths of the sides opposite these 27 Aug, 2021 (M)Sine Rule and its application
  18. 18k = 0 20 C k 20 2 is equal to27 Aug, 2021 (M)Series involving Product of Coefficients
  19. 19If S = z C : z - i z + 2 i R , then27 Aug, 2021 (M)Geometry of Complex Number
  20. 20If the system of linear equations 2 x + y - z = 3 x - y - z = 3 x + 3 y + z = 3 has infinitely many solutions, then + - is equal to ________27 Aug, 2021 (M)System of Linear Equations
  21. 21Let a = i ^ + 5 j ^ + k ^ , b = i ^ + 3 j ^ + k ^ and c = - i ^ + 2 j ^ - 3 k ^ be three vectors such that, | b c | = 5 3 and a is perpendic27 Aug, 2021 (M)Product of 2 vectors
  22. 22The number of distinct real roots of the equation 3 x 4 + 4 x 3 - 12 x 2 + 4 = 0 is _________.27 Aug, 2021 (M)Monotonicity
  23. 23Let n be an odd natural number such that the variance of 1 , 2 , 3 , 4 , , n is 14 . Then n is equal to ________.27 Aug, 2021 (M)Measures of Dispersion
  24. 24Let the equation x 2 + y 2 + p x + ( 1 - p ) y + 5 = 0 represent circles of varying radius r ( 0 , 5 ] . Then the number of elements in the 27 Aug, 2021 (M)Equation of Circle & its intercept
  25. 25If d x x 2 + x + 1 2 = a tan - 1 2 x + 1 3 + b 2 x + 1 x 2 + x + 1 + C , x 0 where C is the constant of integration, then the value of 9 ( 327 Aug, 2021 (M)Integration by Substitution
  26. 26If A = { x R : | x - 2 | 1 } , B = x R : x 2 - 3 1 , C = { x R : | x - 4 | 2 } and Z is the set of all integers, then the number of subsets 27 Aug, 2021 (M)Inequalities
  27. 27A number is called a palindrome if it reads the same backward as well as forward. For example 285582 is a six digit palindrome. The number o27 Aug, 2021 (M)Permutation
  28. 28If y 1 / 4 + y - 1 / 4 = 2 x , and x 2 - 1 d 2 y d x 2 + x d y d x + y = 0 , then | - | is equal to _______.27 Aug, 2021 (M)Higher order derivatives
  29. 29If the minimum area of the triangle formed by a tangent to the ellipse x 2 b 2 + y 2 4 a 2 = 1 and the co-ordinate axis is k a b , then k is27 Aug, 2021 (M)Tangent to ellipse
  30. 30If 0 x 1 , then 3 2 x 2 + 5 3 x 3 + 7 4 x 4 + , is equal to27 Aug, 2021 (M)Summation of Series

Physics

  1. 1Calculate the amount of charge on capacitor of 4 F . The internal resistance of battery is 1 :27 Aug, 2021 (M)Grouping of capacitors
  2. 2A uniformly charged disc of radius R having surface charge density is placed in the x y plane with its center at the origin. Find the electr27 Aug, 2021 (M)Electric Field and Electric Field Lines
  3. 3Five identical cells each of internal resistance 1 and emf 5 V are connected in series and in parallel with an external resistance R . For w27 Aug, 2021 (M)Electric Cell or Battery
  4. 4If E and H represents the intensity of electric field and magnetizing field respectively, then the unit of E H will be:27 Aug, 2021 (M)Units
  5. 5The variation of displacement with time of a particle executing free simple harmonic motion is shown in the figure. The potential energy U (27 Aug, 2021 (M)Energy of Simple Harmonic Motion
  6. 6Which of the following is not a dimensionless quantity?27 Aug, 2021 (M)Dimensions
  7. 7In Millikan s oil drop experiment, what is viscous force acting on an uncharged drop of radius 2 . 0 10 - 5 m and density 1 . 2 10 3 kg m - 27 Aug, 2021 (M)Viscosity
  8. 8A balloon carries a total load of 185 kg at normal pressure and temperature of 27 C . What load will the balloon carry on rising to a height27 Aug, 2021 (M)Gas Laws
  9. 9An ideal gas is expanding such that P T 3 = constant. The coefficient of volume expansion of the gas is:27 Aug, 2021 (M)Thermal Expansion
  10. 10There are 10 10 radioactive nuclei in a given radioactive element. Its half-life time is 1 min . How many nuclei will remain after 30 s ? ( 27 Aug, 2021 (M)Radioactivity
  11. 11An object is placed beyond the centre of curvature C of the given concave mirror. If the distance of the object is d 1 from C and the distan27 Aug, 2021 (M)Mirror Formula, Reflection in Spherical Mirror
  12. 12A bar magnet is passing through a conducting loop of radius R with velocity v . The radius of the bar magnet is such that it just passes thr27 Aug, 2021 (M)Magnetic Flux, Faraday's and Lenz law
  13. 13Two ions of masses 4 amu and 16 amu have charges + 2 e and + 3 e respectively. These ions pass through the region of the constant perpendicu27 Aug, 2021 (M)Motion of Charged Particle in Magnetic Field
  14. 14A huge circular arc of length 4 . 4 ly subtends an angle 4 s at the centre of the circle. How long it would take for a body to complete 4 re27 Aug, 2021 (M)Rotational kinematics
  15. 15The electric field in a plane electromagnetic wave is given by, E = 50 sin 500 x - 10 10 10 t V m - 1 . The velocity of an electromagnetic w27 Aug, 2021 (M)Electromagnetic Waves and Maxwell's equations
  16. 16For a transistor in CE mode to be used as an amplifier, it must be operated in:27 Aug, 2021 (M)Junction Transistors
  17. 17Find the distance of the image from object O , formed by the combination of lenses in the figure:27 Aug, 2021 (M)Lens Formula, Refraction of light from curved surface
  18. 18In a photoelectric experiment, increasing the intensity of incident light:27 Aug, 2021 (M)Photoelectric Effect
  19. 19The resultant of these forces O P , O Q , O R , O S and O T is approximately ______ N . [Take 3 = 1 . 7 , 2 = 1 . 4 Given i ^ and j ^ unit v27 Aug, 2021 (M)Addition and Subtraction of Vectors
  20. 20Moment of inertia of a square plate of side l about the axis passing through one of the corner and perpendicular to the plane of square plat27 Aug, 2021 (M)Moment of inertia of rigid bodies
  21. 21Two cars X and Y are approaching each other with velocities 36 km h - 1 and 72 km h - 1 respectively. The frequency of a whistle sound as em27 Aug, 2021 (M)Doppler's Effect
  22. 22A rod C D of thermal resistance 10 . 0 KW - 1 is joined at the middle of an identical rod A B as shown in figure. The ends A , B and D are m27 Aug, 2021 (M)Conduction
  23. 23Two persons A and B perform same amount of work in moving a body through a certain distance d with application of forces acting at angles 4527 Aug, 2021 (M)Work done
  24. 24A circuit is arranged as shown in figure. The output voltage V o is equal to __________ V .27 Aug, 2021 (M)Diodes
  25. 25A body of mass 2 M splits into four masses { m , M - m , m , M - m } , which are rearranged to form a square as shown in the figure. The rat27 Aug, 2021 (M)Gravitational potential and Potential Energy
  26. 26A uniform conducting wire of length is 24 a , and resistance R is wound up as a current carrying coil in the shape of an equilateral triangl27 Aug, 2021 (M)Magnetic Moment
  27. 27A transmitting antenna has a height of 320 m and that of receiving antenna is 2000 m . The maximum distance between them for satisfactory co27 Aug, 2021 (M)Propagation of EM Waves
  28. 28First, a set of n equal resistors of 10 each are connected in series to a battery of E.M.F. 20 V and internal resistance 10 . A current I is27 Aug, 2021 (M)Combination of Resistances
  29. 29The alternating current is given by, i = 42 sin 2 T t + 10 A . The R.M.S. value of this current is __________ A .27 Aug, 2021 (M)Alternating Current, Voltage and Power
  30. 30If the velocity of a body related to displacement x is given by v = 5000 + 24 x m s - 1 , then the acceleration of the body is _________ m s27 Aug, 2021 (M)Uniform Motion

Frequently Asked Questions

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

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

The JEE Main 2021 27th August Evening 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.What is the structure of the JEE Main 2021 27th August Morning Shift paper?

The JEE Main 2021 27th August Morning 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 27th August Morning Shift paper?

Each question on MARKS carries a difficulty rating. Of the 90 rated questions in this paper, 24 (27%) are easy, 46 (51%) are medium and 20 (22%) are hard. Subject wise:

  • Chemistry: 7 easy, 16 medium, 7 hard
  • Mathematics: 8 easy, 13 medium, 9 hard
  • Physics: 9 easy, 17 medium, 4 hard
7.Which chapters had the most questions in the JEE Main 2021 27th August Morning Shift paper?

The chapters with the most questions in each subject were:

  • Chemistry: Aldehydes and Ketones (3), Coordination Compounds (2), and d and f Block Elements (2).
  • Mathematics: Application of Derivatives (2), Definite Integration (2), and Differential Equations (2).
  • Physics: Current Electricity (2), Magnetic Effects of Current (2), and Ray Optics (2).
8.Are there any out-of-syllabus questions in the JEE Main 2021 27th August Morning 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 Morning 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 Morning 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 Morning 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.