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JEE Main 2019 12th January Morning Shift

Browse the complete Chemistry, Mathematics, and Physics question set from the JEE Main 2019 12th January 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 - 31 easy (34%), 40 moderate (44%) and 19 tough (21%). That's a fairly typical mix for this exam. By subject: Physics 37% easy, 37% moderate, 27% tough; Chemistry 27% easy, 47% moderate, 27% tough; Mathematics 40% easy, 50% moderate, 10% tough.

Chemistry questions were spread across 22 chapters, with Aldehydes and Ketones (3), Coordination Compounds (3), and Chemical Equilibrium (2) carrying the most weight. Mathematics questions were spread across 26 chapters, with Circle (2), Permutation Combination (2), and Sequences and Series (2) carrying the most weight. Physics questions were spread across 21 chapters, with Current Electricity (3), Ray Optics (3), and Center of Mass Momentum and Collision (2) carrying the most weight.

Chemistry

  1. 1The freezing point of a 4 % aqueous solution of X is equal to the freezing point of a 12 % aqueous solution of Y . If the molecular weight o12 Jan, 2019 (M)Colligative Properties and Abnormal Molecular Masses
  2. 2Water samples with B O D values of 4 ppm and 18 ppm, respectively, are:12 Jan, 2019 (M)Water Pollution
  3. 3Iodine reacts with concentrated H N O 3 to yield Y along with other products. The oxidation state of iodine in Y , is:12 Jan, 2019 (M)Nitrogen and Its Compounds
  4. 4The standard electrode potential E o and its temperature coefficient dE dT for a cell are 2 V and - 5 10 - 4 V K - 1 at 300 K , respectively12 Jan, 2019 (M)Cells and Electrode Potential, Nernst Equation
  5. 5The element with Z = 120 (not yet discovered) will be a/an12 Jan, 2019 (M)Modern periodic table
  6. 6Among the following four aromatic compounds, which one will have the lowest melting point?12 Jan, 2019 (M)Conjugation and Aromaticity
  7. 7The correct order for acid strength of compounds CH CH , CH 3 - C CH and CH 2 = CH 2 is as follows:12 Jan, 2019 (M)Conjugation and Aromaticity
  8. 8For a diatomic ideal gas in a closed system, which of the following plots does not correctly describe the relation between various thermodyn12 Jan, 2019 (M)First Law and Basic Fundamentals of Thermodynamics
  9. 9Poly- -hydroxybutyrate-co- -hydroxyvalerate P H B V is a copolymer of _____.12 Jan, 2019 (M)Classification of Polymers
  10. 10In the following reactions, products A and B are:12 Jan, 2019 (M)Chemical reactions for aldehydes and ketones
  11. 11In a chemical reaction, A + 2 B K 2 C + D , the initial concentration of B was 1.5 times of the concentration of A , but the equilibrium con12 Jan, 2019 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  12. 12Among the following compounds most basic amino acid is:12 Jan, 2019 (M)Properties and Preparation of Amino Acids
  13. 13Given: On the basis of data given above, predict which of the following gases shows the least adsorption on a definite amount of charcoal?12 Jan, 2019 (M)Critical phenomena and liquefaction
  14. 14The pair of metal ions that can give a spin only magnetic moment of 3.9 B M for the complex [ M ( H 2 O ) 6 ] C l 2 , is:12 Jan, 2019 (M)Werner's theory and Valence Bond Theory
  15. 15In the Hall-Heroult process, aluminium is formed at the cathode. The cathode is made out of:12 Jan, 2019 (M)Extraction of Metals
  16. 16A metal on combustion in excess air forms X . X upon hydrolysis with water yields H 2 O 2 and O 2 along with another product. The metal is:12 Jan, 2019 (M)General Characteristics of Alkali Metals
  17. 17Two solids dissociate as follows: A s B g + C g ; K P 1 = x atm 2 D s C g + E g ; K P 2 = y atm 2 The total pressure when both the solids di12 Jan, 2019 (M)Law of Mass Action, Equilibrium Constant (Kc and Kp) and its Application
  18. 18The major product of the following reaction is:12 Jan, 2019 (M)Reactions of alkenes
  19. 19The molecule that has minimum or no role in the formation of photochemical smog, is:12 Jan, 2019 (M)Air Pollution
  20. 20cannot be prepared by:12 Jan, 2019 (M)Preparation and Properties of Alcohols
  21. 21The major product of the following reaction is:12 Jan, 2019 (M)Method of preparation for Aldehydes
  22. 22Decomposition of X exhibits a rate constant of 0 .05 g / year . How many years are required for the decomposition of 5 g of X into 2 .5 g ?12 Jan, 2019 (M)Integrated rate laws
  23. 23The volume of gas A is twice than that of gas B . The compressibility factor of gas A is thrice than that of gas B at same temperature. What12 Jan, 2019 (M)Real Gases and Van der Waal's Equation
  24. 24What is the hardness of a water sample ( in terms of equivalents of CaCO 3 ) containing 10 - 3 M CaSO 4 ? ( Molar mass of CaSO 4 = 136 g mol12 Jan, 2019 (M)Preparation and Properties of Water
  25. 25In the following reaction Aldehyde + Alcohol HCl Acetal A l d e h y d e A l c o h o l HCHO t - BuOH CH 3 CHO MeOH The best combination is:12 Jan, 2019 (M)Chemical reactions for aldehydes and ketones
  26. 2650 mL of 0 .5 M oxalic acid is needed to neutralize 25 mL of sodium hydroxide solution. What is the amount of NaOH in 50 mL of the given sod12 Jan, 2019 (M)Redox titration
  27. 27The metal s d - orbitals that are directly facing the ligands in K 3 C o C N 6 are:12 Jan, 2019 (M)Werner's theory and Valence Bond Theory
  28. 28What is the work function of the metal if the light of wavelength 4000 A o generates photoelectrons of velocity 6 10 5 ms - 1 from it? (Mass12 Jan, 2019 (M)Dual Behaviour of Matter and Heisenberg Uncertainty Principle
  29. 29The increasing order of reactivity of the following compounds towards reaction with alkyl halides directly is: ( i ) ( i i ) ( i i i ) ( i v12 Jan, 2019 (M)Preparation and Properties of Amines
  30. 30M n 2 C O 10 is an organometallic compound due to the presence of:12 Jan, 2019 (M)Carbonyl Compounds

Mathematics

  1. 1In a random experiment, a fair die is rolled until two fours are obtained in succession. The probability that the experiment will end in the12 Jan, 2019 (M)Classical Definition of Probability
  2. 2If the sum of the deviations of 50 observations from 30 is 50 , then the mean of these observations is :12 Jan, 2019 (M)Mean
  3. 3The integral c o s lnx d x , is equal to12 Jan, 2019 (M)Integration by Substitution
  4. 4Let S k = 1 + 2 + 3 + + k k . If S 1 2 + S 2 2 + + S 10 2 = 5 12 A , then A is equal to :12 Jan, 2019 (M)Arithmetic Progression
  5. 5l i m x 4 c o t 3 x - t a n x c o s x + 4 is12 Jan, 2019 (M)Trigonometric and Inverse Trigonometric limits
  6. 6Let f and g be continuous functions on 0 , a such that f x = f a - x and g x + g a - x = 4 , then 0 a f x g x d x is equal to12 Jan, 2019 (M)Properties of Definite Integration
  7. 7The sum of the distinct real values of for which the vectors i ^ + j ^ + k ^ , i ^ + j ^ + k ^ , i ^ + j ^ + k ^ are co-planar, is12 Jan, 2019 (M)Algebra of Vectors
  8. 8Considering only the principal values of inverse functions, the set A = x 0 : tan - 1 2 x + tan - 1 3 x = 412 Jan, 2019 (M)Sum and difference of angles
  9. 9Let y = y x be the solution of the differential equation, x d y d x + y = x log e x , x 1 . If 2 y 2 = log e 4 - 1 , then y e is equal to12 Jan, 2019 (M)Linear Differential Equation
  10. 10A ratio of the 5 t h term from the beginning to the 5 t h term from the end in the binomial expansion of 2 1 3 + 1 2 3 1 3 10 is12 Jan, 2019 (M)Terms of Binomial Expansion
  11. 11Let S be the set of all points in - , at which the function, f x = min sin x , cos x is not differentiable. Then S is a subset of which of t12 Jan, 2019 (M)Differentiability
  12. 12Let C 1 and C 2 be the centres of the circles x 2 + y 2 - 2 x - 2 y - 2 = 0 and x 2 + y 2 - 6 x - 6 y + 14 = 0 respectively. If P and Q are 12 Jan, 2019 (M)Intersection of Circles
  13. 13The Boolean expression p q p ~ q ~ p ~ q is equivalent to12 Jan, 2019 (M)Mathematical Reasoning
  14. 14Let P = 1 0 0 3 1 0 9 3 1 and Q = q i j be two 3 3 matrices such that Q - P 5 = I 3 . Then q 21 + q 31 q 32 is equal to :12 Jan, 2019 (M)Product of Matrices
  15. 15Let S = 1 , 2 , 3 , . , 100 , then number of non-empty subsets A of S such that the product of elements in A is even is :12 Jan, 2019 (M)Selection of one or more item
  16. 16If the vertices of a hyperbola be at - 2 , 0 and 2 , 0 and one of its foci be at - 3 , 0 , then which one of the following points does not l12 Jan, 2019 (M)Equation of hyperbola
  17. 17If z - z + R is a purely imaginary number and z = 2 , then a value of is :12 Jan, 2019 (M)Conjugate, modulus and argument
  18. 18If be the ratio of the roots of the quadratic equation in x , 3 m 2 x 2 + m m - 4 x + 2 = 0 , then the least value of m for which + 1 = 1 , 12 Jan, 2019 (M)Relation between Roots and Coefficients
  19. 19For x 1 , if 2 x 2 y = 4 e 2 x - 2 y , then 1 + log e 2 x 2 d y d x is equal to12 Jan, 2019 (M)Logarithmic differentiation
  20. 20The product of three consecutive terms of a G . P . is 512 . If 4 is added to each of the first and the second of these terms, the three ter12 Jan, 2019 (M)Mixed Question on AP and GP
  21. 21Consider three boxes, each containing 10 balls labelled 1 , 2 , . , 10 . Suppose one ball is randomly drawn from each of the boxes. Denote b12 Jan, 2019 (M)Selection of one or more item
  22. 22An ordered pair , for which the system of linear equations 1 + x + y + z = 2 x + 1 + y + z = 3 x + y + 2 z = 2 has a unique solution, is :12 Jan, 2019 (M)System of Linear Equations
  23. 23The maximum area (in sq. units) of a rectangle having its base on the x - axis and its other two vertices on the parabola, y = 12 - x 2 such12 Jan, 2019 (M)Maxima Minima
  24. 24Let P 4 , - 4 and Q 9 , 6 be two points on the parabola, y 2 = 4 x and let X be any point on the arc P O Q of this parabola, where O is the 12 Jan, 2019 (M)standard equation of parabola
  25. 25If the straight line 2 x - 3 y + 17 = 0 is perpendicular to the line passing through the points 7 , 17 and 15 , , then equals :12 Jan, 2019 (M)Derived Forms of Line
  26. 26If a variable line 3 x + 4 y - = 0 is such that the two circles x 2 + y 2 - 2 x - 2 y + 1 = 0 and x 2 + y 2 - 18 x - 2 y + 78 = 0 are on its12 Jan, 2019 (M)Position of point
  27. 27A tetrahedron has vertices P 1 , 2 , 1 , Q 2 , 1 , 3 , R - 1 , 1 , 2 and O 0 , 0 , 0 . The angle between the faces O P Q and P Q R is12 Jan, 2019 (M)Line and Plane
  28. 28The perpendicular distance from the origin to the plane containing the two lines, x + 2 3 = y - 2 5 = z + 5 7 and x - 1 1 = y - 4 4 = z + 4 12 Jan, 2019 (M)Line and Plane
  29. 29The area (in sq. units) of the region bounded by the parabola, y = x 2 + 2 and the lines, y = x + 1 , x = 0 and x = 3 , is12 Jan, 2019 (M)Area bounded by two curves
  30. 30The maximum value of 3 cos + 5 sin - 6 for any real value of is :12 Jan, 2019 (M)Maximum and Minimum Values

Physics

  1. 1Two light identical springs of spring constant k are attached horizontally at the two ends of a uniform horizontal rod A B of length l and m12 Jan, 2019 (M)Angular oscillations
  2. 2The galvanometer deflection, when key K 1 is closed but K 2 is open, equals 0 (see figure). On closing K 2 also and adjusting R 2 to 5 , the12 Jan, 2019 (M)Electric Instruments
  3. 3The figure shows a capacitor of capacitance C connected to a battery via a switch, having a total charge Q on it, in steady-state. When the 12 Jan, 2019 (M)Charging and Discarging of capacitors
  4. 4A 100 V carrier wave is made to vary between 160 V and 40 V by a modulating signal. What is the modulation index?12 Jan, 2019 (M)Modulation
  5. 5The least count of the main scale of a screw gauge is 1 mm . The minimum number of divisions on its circular scale required to measure 5 m d12 Jan, 2019 (M)Experimental Physics
  6. 6An ideal battery of emf 4 V and resistance R are connected in series in the primary circuit of a potentiometer of length 1 m and resistance 12 Jan, 2019 (M)Electric Instruments
  7. 7The output of the given logic circuit is:12 Jan, 2019 (M)Logic gates
  8. 8A particle of mass m moves in a circular orbit in a central potential field U r = 1 2 k r 2 . If Bohr s quantization conditions are applied,12 Jan, 2019 (M)Bohr's Atomic Model
  9. 9A person standing on an open ground hears the sound of a jet aeroplane, coming from north at an angle 60 o with ground level, but he finds t12 Jan, 2019 (M)Addition and Subtraction of Vectors
  10. 10A simple pendulum, made of a string of length l and a bob of mass m , is released from a small angle 0 . It strikes a block of mass M , kept12 Jan, 2019 (M)Collisions
  11. 11Determine the electric dipole moment of the system of three charges, placed on the vertices of an equilateral triangle, as shown in the figu12 Jan, 2019 (M)Electric Dipole
  12. 12A proton and an - particle (with their masses in the ratio of 1 : 4 and charges in the ratio of 1 : 2 ) are accelerated from rest through a 12 Jan, 2019 (M)Motion of Charged Particle in Magnetic Field
  13. 13A travelling harmonic wave is represented by the equation y x , t = 10 - 3 sin 50 t + 2 x , where x and y are in meter and t is in seconds. 12 Jan, 2019 (M)Travelling Waves
  14. 14A particle A of mass m and charge q is accelerated by a potential difference of 50 V . Another particle B of mass 4 m and charge q is accele12 Jan, 2019 (M)Matter Waves
  15. 15A satellite of mass M is in a circular orbit of radius R about the center of the earth. A meteorite of the same mass, falling towards the ea12 Jan, 2019 (M)Motion of satellite
  16. 16A point source of light, S is placed at a distance L in front of the center of plane mirror of width d which is hanging vertically on a wall12 Jan, 2019 (M)Reflection of Light from Plane Mirror
  17. 17A cylinder of radius R is surrounded by a cylindrical shell of inner radius R and outer radius 2 R . The thermal conductivity of the materia12 Jan, 2019 (M)Conduction
  18. 18The position vector of the center of mass r cm of an asymmetric uniform bar of negligible area of cross-section as shown in figure is:12 Jan, 2019 (M)Centre of mass of continuous mass distribution
  19. 19Let the moment of inertia of a hollow cylinder of length 30 c m (inner radius 10 c m and outer radius 20 c m ), about its axis be I . The ra12 Jan, 2019 (M)Moment of inertia of rigid bodies
  20. 20A light wave is incident normally on a glass slab of refractive index 1.5 . If 4 % of light gets reflected and the amplitude of the electric12 Jan, 2019 (M)Refraction of light from plane surface
  21. 21For the given cyclic process C A B as shown for a gas, the work done is:12 Jan, 2019 (M)Thermodynamic Processes
  22. 22As shown in the figure, two infinitely long, identical wires are bent by 90 o and placed in such a way that the segments L P and Q M are alo12 Jan, 2019 (M)Magnetic Field
  23. 23There is a uniform spherically symmetric surface charge density at a distance R 0 from the origin. The charge distribution is initially at r12 Jan, 2019 (M)Electric Potential and Potential Energy
  24. 24A passenger train of length 60 m travels at a speed of 80 km / hr . Another freight train of length 120 m travels at a speed of 30 km / hr .12 Jan, 2019 (M)Relative motion
  25. 25In the figure shown, a circuit contains two identical resistors with resistance R = 5 and an inductance with L = 2 m H . An ideal battery of12 Jan, 2019 (M)AC Circuits
  26. 26Two electric bulbs, rated at 25 W , 220 V and 100 W , 220 V , are connected in series across a 220 V voltage source. If the 25 W and 100 W b12 Jan, 2019 (M)Electric Power and Heating Effect of Current
  27. 27A straight rod of length L extends from x = a to x = L + a . The gravitational force it exerts on a point mass m at x = 0 , if the mass per 12 Jan, 2019 (M)Newton's Law of Gravitation
  28. 28An ideal gas occupies a volume of 2 m 3 at a pressure of 3 10 6 P a . The energy of the gas is:12 Jan, 2019 (M)Degree of Freedom and Specific Heat
  29. 29What is the position and nature of image formed by lens combination shown in figure? ( f 1 , f 2 are focal lengths)12 Jan, 2019 (M)Lens Formula, Refraction of light from curved surface
  30. 30In a meter bridge, the wire of length 1 m has a non-uniform cross-section such that, the variation d R d l of its resistance R with length l12 Jan, 2019 (M)Experimental Physics

Frequently Asked Questions

1.How many questions are in the JEE Main 2019 12th January 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 12th January 2019 morning shift.

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

The JEE Main 2019 12th January Evening Shift paper is listed separately - you can switch to it from the "JEE Main Paper Wise PYQs" panel, under JEE Main 12th January 2019.

5.How is the JEE Main 2019 12th January Morning Shift paper structured?

The JEE Main 2019 12th January Morning Shift paper on MARKS has 90 questions, organised by subject:

  • Chemistry: 30 questions - 30 single-correct.
  • Mathematics: 30 questions - 30 single-correct.
  • Physics: 30 questions - 30 single-correct.
6.How difficult is the JEE Main 2019 12th January Morning Shift paper?

Each question on MARKS carries a difficulty rating. Of the 90 rated questions in this paper, 31 (34%) are easy, 40 (44%) are medium and 19 (21%) are hard. Subject wise:

  • Chemistry: 8 easy, 14 medium, 8 hard
  • Mathematics: 12 easy, 15 medium, 3 hard
  • Physics: 11 easy, 11 medium, 8 hard
7.Which chapters were asked the most in the JEE Main 2019 12th January Morning Shift paper?

The chapters with the most questions in each subject were:

  • Chemistry: Aldehydes and Ketones (3), Coordination Compounds (3), and Chemical Equilibrium (2).
  • Mathematics: Circle (2), Permutation Combination (2), and Sequences and Series (2).
  • Physics: Current Electricity (3), Ray Optics (3), and Center of Mass Momentum and Collision (2).
8.Are there any out-of-syllabus questions in the JEE Main 2019 12th January Morning 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 2019 12th January 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 2019 12th January 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 2019 12th January 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.