JEE Main 2019 (Online) 11th January Evening Slot

Paper was held on
Fri, Jan 11, 2019 9:30 AM

## Chemistry

The correct match between Item I and Item II is :
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View Question For the equilibrium,
2H2O $$\rightleftharpoons$$ H3O+ + OH$$-$$, the value of $$\Delta $$Go at 298 K is approximately

View Question The correct option with respect to the Pauling electronegativity values of the element is :

View Question The radius of the largest sphere which fits properly at the centre of the edge of a body centred cubic unit cell is : (E

View Question The higher concentration of which gas in air can cause stiffness of flower buds?

View Question K2Hgl4 is 40% ionised in aqueous solution. The value of its van't Hoff factor (i) is:

View Question The de Broglie wavelength ($$\lambda $$) associated with a photoelectron varies with the frequency (v) of the incident r

View Question Match the following items in column I with the corresponding items in column II.
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View Question The reaction, MgO(s) + C(s) $$ \to $$ Mg(s) + CO(g), for which $$\Delta $$rHo + 491.1 kJ mol–1 and $$\Delta $$rSo = 198.

View Question $$\underline A \,\,\buildrel {4KOH,{O_2}} \over
\longrightarrow \,\,\mathop {2\underline B }\limits_{\left( {Green} \ri

View Question The reaction that does NOT define calcination is :

View Question 25 ml of the given HCl solution requires 30 mL of 0.1 M sodium carbonate solution. What is the volume of this HCl soluti

View Question Taj Mahal is being slowly disfigured and discoloured. This is primarily due to :

View Question The standard reaction Gibbs energy for a chemical reaction at an absolute temperature T is given by
$$\Delta $$rGo = A –

View Question Among the colloids cheese (C), milk (M), and smoke (S), the correct combination of the dispersed phase and dispersion me

View Question A compound 'X' on treatment with Br2/NaOH, provided C3H9N, which gives positive carbylamine test. Compound 'X' is :

View Question The reaction 2X $$ \to $$ B is a zeroth order reaction. If the initial concentration of X is 0.2 M, the half-life is 6 h

View Question The correct match between Item I and Item II is :
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View Question The number of bridging CO ligand(s) and Co-Co bond(s) in Co2(CO)8, respectively are :

View Question Given the equilibrium constant:
KC of the reaction :
Cu(s) + 2Ag+ (aq) $$ \to $$ Cu2+ (aq) + 2Ag(s) is 10 $$ \times $$

View Question The relative stability of +1 oxidation state of group 13 elements follows the order :

View Question The hydride that is NOT electron deficient :

View Question The coordination number of Th in K4[Th(C2O4)4(OH2)2] is :
(C2O$${_4^{2 - }}$$ = Oxalato)

View Question The major product obtained in the following reaction is :

View Question The major product of the following reaction is :

View Question Which of the following compounds reacts with ethylmagnesium bromide and also decolourizes bromine water solution:

View Question The homopolymer formed from 4-hydroxy-butanoic acid is :

View Question The major product obtained in the following conversion is

View Question In the following compound,
the favourable site/s for protonation is/are :

View Question Which of the following compounds will produce a precipitate with AgNO3 ?

View Question ## Mathematics

The solution of the differential equation,
$${{dy} \over {dx}}$$ = (x – y)2, when y(1) = 1, is :

View Question The number of functions f from {1, 2, 3, ...., 20} onto {1, 2, 3, ...., 20} such that f(k) is a multiple of 3,
whenever

View Question Let K be the set of all real values of x where the function f(x) = sin |x| – |x| + 2(x – $$\pi $$) cos |x| is not differ

View Question Let z be a complex number such that |z| + z = 3 + i (where i = $$\sqrt { - 1} $$). Then |z| is equal to :

View Question If 19th term of a non-zero A.P. is zero, then its (49th term) : (29th term) is :

View Question If $$\left| {\matrix{
{a - b - c} & {2a} & {2a} \cr
{2b} & {b - c - a} & {2b} \cr

View Question Let $$\alpha $$ and $$\beta $$ be the roots of the quadratic equation x2
sin $$\theta $$ – x(sin $$\theta $$ cos $$\the

View Question Let (x + 10)50 + (x $$-$$ 10)50 = a0 + a1x + a2x2 + . . . . + a50x50, for all x $$ \in $$ R; then $${{{a_2}} \over {{a_0

View Question $$\mathop {\lim }\limits_{x \to 0} {{x\cot \left( {4x} \right)} \over {{{\sin }^2}x{{\cot }^2}\left( {2x} \right)}}$$ is

View Question The area (in sq. units) in the first quadrant bounded by the parabola, y = x2 + 1, the tangent to it at the point (2, 5)

View Question Two lines $${{x - 3} \over 1} = {{y + 1} \over 3} = {{z - 6} \over { - 1}}$$ and $${{x + 5} \over 7} = {{y - 2} \over {

View Question If $$\int {{{x + 1} \over {\sqrt {2x - 1} }}} \,dx$$ = f(x) $$\sqrt {2x - 1} $$ + C, where C is a constant o

View Question Let A and B be two invertible matrices of order 3 $$ \times $$ 3. If det(ABAT) = 8 and det(AB–1) = 8,
then det (BA–1 BT

View Question Let a function f : (0, $$\infty $$) $$ \to $$ (0, $$\infty $$) be defined by f(x) = $$\left| {1 - {1 \over x}} \right|$$

View Question Contrapositive of the statement " If two numbers are not equal, then their squares are not equal." is :

View Question The integral $$\int\limits_{\pi /6}^{\pi /4} {{{dx} \over {\sin 2x\left( {{{\tan }^5}x + {{\cot }^5}x} \right

View Question Let f(x) = $${x \over {\sqrt {{a^2} + {x^2}} }} - {{d - x} \over {\sqrt {{b^2} + {{\left( {d - x} \right)}^2}} }},\,\,$$

View Question Let the length of the latus rectum of an ellipse with its major axis along x-axis and centre at the origin, be 8. If the

View Question Let S = {1, 2, . . . . . ., 20}. A subset B of S is said to be "nice", if the sum of the elements of B is 20

View Question If a hyperbola has length of its conjugate axis equal to 5 and the distance between its foci is 13, then the
eccentricit

View Question Let x, y be positive real numbers and m, n positive integers. The maximum value of the expression $${{{x^m}{y^n}} \over

View Question If the point (2, $$\alpha $$, $$\beta $$) lies on the plane which passes through the points (3, 4, 2) and (7, 0, 6) and

View Question Let Sn = 1 + q + q2 + . . . . . + qn and Tn = 1 + $$\left( {{{q + 1} \over 2}} \right) + {\left( {{{q + 1} \over 2}} \

View Question Let $$\sqrt 3 \widehat i + \widehat j,$$ $$\widehat i + \sqrt 3 \widehat j$$ and  

View Question All x satisfying the inequality (cot–1
x)2– 7(cot–1 x) + 10 > 0, lie in the interval :

View Question Given $${{b + c} \over {11}} = {{c + a} \over {12}} = {{a + b} \over {13}}$$ for a $$\Delta $$ABC with usual notation.

View Question A bag contains 30 white balls and 10 red balls. 16 balls are drawn one by one randomly from the bag with replacement. If

View Question If in a parallelogram ABDC, the coordinates of A, B and C are respectively (1, 2), (3, 4) and (2, 5), then the
equation

View Question If the area of the triangle whose one vertex is at the vertex of the parabola, y2 + 4(x – a2) = 0 and the othertwo verti

View Question A circle cuts a chord of length 4a on the x-axis and passes through a point on the y-axis, distant 2b from the origin. T

View Question ## Physics

The region between y = 0 and y = d contains a magnetic field $$\overrightarrow B = B\widehat z$$. A particle of mass m

View Question In a double-slit experiment, green light (5303$$\mathop A\limits^ \circ $$) falls on a double slit having a separation

View Question Two rods A and B of identical dimensions are at temperature 30°C. If A is heated upto 180oC and B upto ToC, then the new

View Question When 100 g of a liquid A at 100oC is added to 50 g of a liquid B at temperature 75oC, the temperature of the mixture bec

View Question A simple pendulum of length 1 m is oscillating with an angular frequency 10 rad/s. The support of the pendulum starts os

View Question An electric field of 1000 V/m is applied to an electric dipole at angle of 45o. The value of electric dipole moment is 1

View Question A metal ball of mass 0.1 kg is heated upto 500oC and dropped into a vessel of heat capacity 800 JK–1 and containing 0.5

View Question A monochromatic light is incident at a certain angle on an equilateral triangular prism and suffers minimum deviation. I

View Question A paramagnetic substance in the form of a cube with sides 1 cm has a magnetic dipole moment of 20 $$ \times $$ 10–6 J/ T

View Question The mass and the diameter of a planet are three times the respective values for the Earth. The period of oscillation of

View Question In a hydrogen like atom, when an electron jumps from the M-shell to the L-shell, the wavelength of emitted radiation is

View Question A pendulum is executing simple harmonic motion and its maximum kinetic energy is K1. If the length of the pendulum is do

View Question A thermometer graduated according to a linear scale reads a value x0 when in contact with boiling water, and x0/3 when i

View Question A 27 mW laser beam has a cross-sectional area of 10 mm2. The magnitude of the maximum electric field in this electromagn

View Question A particle of mass m is moving in a straight line with momentum p. Starting at time t = 0, a force F = kt acts in the sa

View Question In a photoelectric experiment, the wavelength of the light incident on a metal is changed from 300 nm to 400 nm. The dec

View Question A galvanometer having a resistance of 20 $$\Omega $$ and 30 divisions on both sides has figure of merit 0.005 ampere/div

View Question A particle of mass m and charge q is in an electric and magnetic field given by
$$\overrightarrow E = 2\widehat i + 3\w

View Question If speed (V), acceleration (A) and force (F) are considered as fundamental units, the dimension of Young,s modulus will

View Question A copper wire is wound on a wooden frame, whose shape is that of an equilateral triangle. If the linear
dimension of eac

View Question The magnitude of torque on a particle of mass 1 kg is 2.5 Nm about the origin. If the force acting on it is 1 N, and the

View Question A particle moves from the point $$\left( {2.0\widehat i + 4.0\widehat j} \right)$$ m, at t = 0, with an initial velocity

View Question In a process, temperature and volume of one mole of an ideal monoatomic gas are varied according to the relation VT = K,

View Question A circular disc D1 of mass M and radius R has two identical discs D2 and D3 of the same mass M and radius R attached rig

View Question In the circuit shown, the potential difference between A and B is :

View Question Seven capacitors, each of capacitance 2 $$\mu $$F, are to be connected in a configuration to obtain an effective capacit

View Question A string is wound around a hollow cylinder of mass 5 kg and radius 0.5m. If the string is now pulled with a horizontal f

View Question The circuit shown below contains two ideal diodes, each with a forward resistance of 50 $$\Omega $$. If the battery volt

View Question In the experimental set up of metre bridge shown in the figure, the null point is obtained at a distance of 40 cm from A

View Question An amplitude modulated signal is plotted below :
Which one of the following best describes the above signal ?

View Question