JEE Main 2019 (Online) 10th April Evening Slot

Paper was held on
Wed, Apr 10, 2019 9:30 AM

## Chemistry

The major product obtained in the given reaction is :

View Question Which of the following is not a correct method of the preparation of benzylamine from cyanobenzene ?

View Question The noble gas that does not occur in the atmosphere is :

View Question Compound A(C9H10O) shows positive iodoform test. Oxidation of A with KMnO4/KOH given acid
B(C8H6O4). Anhydride of B is u

View Question Number of stereo centers present in linear and cyclic structures of glucose are respectively :

View Question The highest possible oxidation states of uranium and plutonium, respectively are :

View Question The INCORRECT statement is :

View Question In chromatography, which of the following statements is incorrect for Rf ?

View Question For the reaction of H2 with I2, the rate constant is 2.5 × 10–4 dm3
mol–1s–1
at 327°C and 1.0 dm3
mol–1
at
527°C. Th

View Question The major product 'Y' in the following reactions is :

View Question The correct order of the first ionization enthalpies is :

View Question The ratio of the shortest wavelength of two spectral series of hydrogen spectrum is found to be about 9. The
spectral se

View Question 1 g of a non-volatile non-electrolyte solute is dissolved in 100 g of two different solvents A and B whose
ebullioscopic

View Question The difference between $$\Delta $$H and $$\Delta $$U ($$\Delta $$H – $$\Delta $$U), when the combustion of one mole of h

View Question The minimum amount of O2(g) consumed per gram of reactant is for the reaction : (Given atomic mass : Fe =
56, O = 16, Mg

View Question For the reaction,
2SO2(g) + O2(g) = 2SO3(g), $$\Delta $$H = –57.2 kJ mol–1
and KC = 1.7 × 1016
Which of the following

View Question The pH of a 0.02 M NH4Cl solution will be :
[given Kb (NH4OH) = 10–5
and log 2 = 0.301]

View Question Which of these factors does not govern the stability of a conformation in acyclic compounds?

View Question The crystal field stabilization energy (CFSE) of [Fe(H2O)6]Cl2 and K2[NiCl4] respectively, are :

View Question The increasing order of nucleophilicity of the following nucleophiles is :
(a) CH3CO2$$-$$  

View Question Which one of the following graphs between molar conductivity ($${\Lambda _m}$$) versus $$\sqrt C $$ is correct ?

View Question The major product 'Y' in the following reaction is :

View Question ## Mathematics

If $$\mathop {\lim }\limits_{x \to 1} {{{x^2} - ax + b} \over {x - 1}} = 5$$, then a + b is equal to :

View Question The number of real roots of the equation
5 + |2x
– 1| = 2x
(2x
– 2) is

View Question A spherical iron ball of radius 10 cm is coated with a layer of ice of uniform thickness that melts at a rate of
50 cm3

View Question Let f(x) = loge(sin x), (0 < x < $$\pi $$) and g(x) = sin–1
(e–x
), (x $$ \ge $$ 0). If $$\alpha $$ is a positive

View Question Minimum number of times a fair coin must be tossed so that the probability of getting at least one head is
more than 99%

View Question Let $$\lambda $$ be a real number for which the system of linear equations x + y + z = 6, 4x + $$\lambda $$y – $$\lambda

View Question The smallest natural number n, such that the coefficient of x in the expansion of $${\left( {{x^2} + {1 \over {{x^3}}}}

View Question If 5x + 9 = 0 is the directrix of the hyperbola 16x2
– 9y2
= 144, then its corresponding focus is :

View Question The sum of the real roots of the equation
$$\left| {\matrix{
x & { - 6} & { - 1} \cr
2 & { - 3x} &am

View Question If z and w are two complex numbers such that |zw| = 1 and arg(z) – arg(w) = $${\pi \over 2}$$
, then :

View Question The area (in sq.units) of the region bounded by the curves y = 2x
and y = |x + 1|, in the first quadrant is :

View Question The integral $$\int\limits_{\pi /6}^{\pi /3} {{{\sec }^{2/3}}} x\cos e{c^{4/3}}xdx$$ is equal to :

View Question Suppose that 20 pillars of the same height have been erected along the boundary of a circular stadium. If the
top of eac

View Question If $$\int {{x^5}} {e^{ - {x^2}}}dx = g\left( x \right){e^{ - {x^2}}} + c$$, where c is a constant of integration, then

View Question Let $$a$$, b and c be in G.P. with common ratio r, where $$a$$ $$ \ne $$ 0 and 0 < r $$ \le $$ $${1 \over 2}$$
. If 3

View Question Let y = y(x) be the solution of the differential equation,
$${{dy} \over {dx}} + y\tan x = 2x + {x^2}\tan x$$, $$x \in \

View Question Lines are drawn parallel to the line 4x – 3y + 2 = 0, at a distance
$${3 \over 5}$$
from the origin. Then which one of

View Question If both the mean and the standard deviation of 50 observations x1, x2,..., x50 are equal to 16, then the mean of (x1 – 4

View Question Let a1, a2, a3,......be an A.P. with a6 = 2. Then the common difference of this A.P., which maximises the
product a1a4a5

View Question If $${\cos ^{ - 1}}x - {\cos ^{ - 1}}{y \over 2} = \alpha $$,where –1 $$ \le $$ x $$ \le $$ 1, – 2 $$ \le $$ y $$ \le $$

View Question The distance of the point having position vector $$ - \widehat i + 2\widehat j + 6\widehat k$$
from the straight line p

View Question ## Physics

In free space, a particle A of charge 1$$\mu $$C is held fixed at a point P. Another particle B of the same charge and
m

View Question In the formula X = 5YZ2
, X and Z have dimensions of capacitance and magnetic field, respectively. What are
the dimensio

View Question A bullet of mass 20 g has an initial speed of 1 ms–1
, just before it starts penetrating a mud wall of thickness
20 cm.

View Question The figure represents a voltage regulator circuit using a Zener diode. The breakdown voltage of the Zener
diode is 6 V a

View Question A coil of self inductance 10 mH and resistance 0.1 $$\Omega $$ is connected through a switch to a battery of internal
re

View Question A metal coin of mass 5 g and radius 1 cm is fixed to a thin stick AB of negligible mass as shown in the
figure. The syst

View Question Space between two concentric conducting spheres of radii a and b (b > a) is filled with a medium of
resistivity $$\rh

View Question One mole of ideal gas passes through a process where pressure and volume obey the relation
$$P = {P_0}\left[ {1 - {1 \ov

View Question Water from a tap emerges vertically downwards with an initial speed of 1.0 ms–1
. The cross-sectional area of
the tap is

View Question A submarine experiences a pressure of 5.05 × 106
Pa at a depth of d1 in a sea. When it goes further to a depth
of d2, i

View Question A square loop is carrying a steady current I and the magnitude of its magnetic dipole moment is m. if this
square loop i

View Question The correct figure that shows, schematically, the wave pattern produced by superposition of two waves of
frequencies 9 H

View Question In a Young's double slit experiment, the ratio of the slit's width is 4 : 1. The ratio of the intensity of maxima to min

View Question A spaceship orbits around a planet at a height of 20 km from its surface. Assuming that only gravitational
field of the

View Question A solid sphere of mass M and radius R is divided into two unequal parts. The first part has a mass of $${{7M} \over 8}$$

View Question In Li+ +, electron in first Bohr orbit is excited to a level by a radiation of wavelength $$\lambda $$. When the ion get

View Question Light is incident normally on a completely absorbing surface with an energy flux of 25 W cm–2. If the surface
has an are

View Question Two blocks A and B of masses mA = 1 kg and mB = 3 kg are kept on the table as shown in figure. The coefficient of fricti

View Question The magnitude of the magnetic field at the centre of an equilateral triangular loop of side 1 m which is
carrying a curr

View Question The time dependence of the position of a particle of mass m = 2 is given by $$\overrightarrow r \left( t \right) = 2t\wi

View Question A plane is inclined at an angle $$\alpha $$ = 30° with respect to the horizontal. A particle is projected with a speed u

View Question In an experiment, brass and steel wires of length 1 m each with areas of cross section 1mm2
are used. The
wires are con

View Question A simple pendulum of length L is placed between the plates of a parallel plate capacitor having electric field
E, as sho

View Question The graph shows how the magnification m produced by a thin lens varies with image distance v. What is the focal length o

View Question A cubical block of side 0.5 m floats on water with 30% of its volume under water. What is the maximum
weight that can be

View Question A 2 mW laser operates at wavelength of 500 nm. The number of photons that will be emitted per second is :
[Given Planck'

View Question The elastic limit of brass is 379 MPa. What should be the minimum diameter of a brass rod if it is to support
a 400 N lo

View Question When heat Q is supplied to a diatomic gas of rigid molecules, at constant volume its temperature increases by
$$\Delta $

View Question