JEE Main 2019 (Online) 9th April Evening Slot

Paper was held on
Tue, Apr 9, 2019 9:30 AM

## Chemistry

Increasing order of reactivity of the following
compounds for SN1 substitution is:

View Question The one that is not a carbonate ore is :

View Question During compression of a spring the work done
is 10kJ and 2kJ escaped to the surroundings as
heat. The change in internal

View Question The amorphous form of silica is :

View Question The major products A and B for the following
reactions are, respectively:

View Question Which one of the following about an electron
occupying the 1s orbital in a hydrogen atom is
incorrect ? (The Bohr radius

View Question The maximum possible denticities of a ligand
given below towards a common transition and
inner-transition metal ion, res

View Question The correct statements among I to III regarding
group 13 element oxides are,
(I) Boron trioxide is acidic.
(II) Oxides o

View Question Among the following species, the diamagnetic
molecule is

View Question The peptide that gives positive ceric
ammonium nitrate and carbylamine tests is :

View Question Assertion: For the extraction of iron, haematite
ore is used.
Reason: Haematite is a carbonate ore of iron.

View Question 10 mL of 1mM surfactant solution forms a
monolayer covering 0.24 cm2 on a polar
substrate. If the polar head is approxim

View Question A solution of Ni(NO3)2 is electrolysed between
platinum electrodes using 0.1 Faraday
electricity. How many mole of Ni wi

View Question Consider the given plot of enthalpy of the
following reaction between A and B.
A+ B $$ \to $$ C + D
Identify the incorre

View Question At a given temperature T, gases Ne, Ar, Xe and
Kr are found to deviate from ideal gas
behaviour. Their equation of state

View Question In the following reaction
Rate of the reaction is the highest for :

View Question The structures of beryllium chloride in the solid
state and vapour, phase, respectively,are :

View Question Which of the following potential energy (PE)
diagrams represents the SN1 reaction?

View Question The major product of the following reaction is:

View Question The maximum number of possible oxidation
states of actinoides are shown by :

View Question Molal depression constant for a solvent is
4.0 kg mol–1. The depression in the freezing
point of the solvent for 0.03 mo

View Question Noradrenaline is a/an

View Question Hinsberg's reagent is :

View Question What would be the molality of 20% (mass/
mass) aqueous solution of KI?
(molar mass of KI = 166 g mol–1)

View Question The correct statements among I to III are :
(I) Valence bond theory cannot explain the
color exhibited by transition met

View Question p-Hydroxybenzophenone upon reaction with
bromine in carbon tetrachloride gives:

View Question In an acid-base titration, 0.1 M HCl solution
was added to the NaOH solution of unknown
strength. Which of the following

View Question HF has highest boiling point among hydrogen
halides, because it has :

View Question Which of the following compounds is a
constituent of the polymer

View Question The layer of atmosphere between 10 km to
50 km above the sea level is called as :

View Question ## Mathematics

If the tangent to the parabola y2 = x at a point
($$\alpha $$, $$\beta $$), ($$\beta $$ > 0) is also a tangent to the

View Question Some identical balls are arranged in rows to form
an equilateral triangle. The first row consists of one
ball, the secon

View Question If some three consecutive in the binomial
expansion of (x + 1)n is powers of x are in the ratio
2 : 15 : 70, then the av

View Question If $$\cos x{{dy} \over {dx}} - y\sin x = 6x$$, (0 < x < $${\pi \over 2}$$)
and $$y\left( {{\pi \over 3}} \right)

View Question The value of sin 10º sin30º sin50º sin70º is :-

View Question If the system of equations 2x + 3y – z = 0, x + ky
– 2z = 0 and 2x – y + z = 0 has a non-trival solution
(x, y, z), then

View Question The common tangent to the circles x 2 + y2 = 4 and
x2 + y2 + 6x + 8y – 24 = 0 also passes through the
point :

View Question The value of the integral $$\int\limits_0^1 {x{{\cot }^{ - 1}}(1 - {x^2} + {x^4})dx} $$ is :-

View Question Let z $$ \in $$ C be such that |z| < 1.
If $$\omega = {{5 + 3z} \over {5(1 - z)}}$$z, then :

View Question If the sum and product of the first three term in
an A.P. are 33 and 1155, respectively, then a value
of its 11th term i

View Question If f : R $$ \to $$ R is a differentiable function and
f(2) = 6, then $$\mathop {\lim }\limits_{x \to 2} {{\int\limits_6^

View Question If the two lines x + (a – 1) y = 1 and
2x + a2y = 1 (a$$ \in $$R – {0, 1}) are perpendicular, then
the distance of their

View Question A water tank has the shape of an inverted right
circular cone, whose semi-vertical angle is
$${\tan ^{ - 1}}\left( {{1 \

View Question Two poles standing on a horizontal ground are of
heights 5m and 10 m respectively. The line joining
their tops makes an

View Question The vertices B and C of a $$\Delta $$ABC lie on the line,
$${{x + 2} \over 3} = {{y - 1} \over 0} = {z \over 4}$$ such

View Question The total number of matrices
$$A = \left( {\matrix{
0 & {2y} & 1 \cr
{2x} & y & { - 1} \cr

View Question If $$f(x) = [x] - \left[ {{x \over 4}} \right]$$ ,x $$ \in $$
4
, where [x] denotes the
greatest integer function, then

View Question If the function $$f(x) = \left\{ {\matrix{
{a|\pi - x| + 1,x \le 5} \cr
{b|x - \pi | + 3,x > 5} \cr
} }

View Question $$\int {{e^{\sec x}}}$$ $$(\sec x\tan xf(x) + \sec x\tan x + se{x^2}x)dx$$
= esecxf(x) + C then a possible choice of f(x

View Question The area (in sq. units) of the smaller of the two
circles that touch the parabola, y2 = 4x at the point
(1, 2) and the

View Question If m is chosen in the quadratic equation
(m2 + 1)
x2 – 3x + (m2 + 1)2 = 0
such that the sum of its
roots is greatest,

View Question Let P be the plane, which contains the line of
intersection of the planes, x + y + z – 6 = 0 and
2x + 3y + z + 5 = 0 and

View Question If p $$ \Rightarrow $$ (q $$ \vee $$ r) is false, then the truth values of p,
q, r are respectively :-

View Question Two newspapers A and B are published in a city.
It is known that 25% of the city populations reads
A and 20% reads B whi

View Question The domain of the definition of the function
$$f(x) = {1 \over {4 - {x^2}}} + {\log _{10}}({x^3} - x)$$ is

View Question The sum of the series 1 + 2 × 3 + 3 × 5 + 4 × 7 +....
upto 11th term is :-

View Question The area (in sq. units) of the region
A = {(x, y) : $${{y{}^2} \over 2}$$ $$ \le $$ x $$ \le $$ y + 4} is :-

View Question The mean and the median of the following ten
numbers in increasing order 10, 22, 26, 29, 34, x,
42, 67, 70, y are 42 and

View Question If a unit vector $$\overrightarrow a $$ makes angles $$\pi $$/3 with $$\widehat i$$ , $$\pi $$/ 4
with $$\widehat j$$ an

View Question A rectangle is inscribed in a circle with a diameter
lying along the line 3y = x + 7. If the two adjacent
vertices of th

View Question ## Physics

Two coils 'P' and 'Q' are separated by some
distance. When a current of 3 A flows through
coil 'P', a magnetic flux of 1

View Question A metal wire of resistance 3 $$\Omega $$ is elongated to
make a uniform wire of double its previous
length. This new wi

View Question The resistance of a galvanometer is 50 ohm and
the maximum current which can be passed
through it is 0.002 A. What resis

View Question A thin convex lens L (refractive index = 1.5)
is placed on a plane mirror M. When a pin is
placed at A, such that OA = 1

View Question A moving coil galvanometer has a coil with
175 turns and area 1 cm2. It uses a torsion band
of torsion constant 10–6 N-m

View Question The position of a particle as a function of time
t, is given byx(t) = at + bt2 – ct3
where a, b and c are constants. Whe

View Question A very long solenoid of radius R is carrying
current I(t) = kte–at(k > 0), as a function of time
(t $$ \ge $$ 0). cou

View Question A massless spring (k = 800 N/m), attached with
a mass (500 g) is completely immersed in 1 kg
of water. The spring is str

View Question Diameter of the objective lens of a telescope is
250 cm. For light of wavelength 600nm.
coming from a distant object, th

View Question A convex lens of focal length 20 cm produces
images of the same magnification 2 when an
object is kept at two distances

View Question A particle 'P' is formed due to a completely
inelastic collision of particles 'x' and 'y' having
de-Broglie wavelengths

View Question Moment of inertia of a body about a given axis
is 1.5 kg m2. Initially the body is at rest. In order
to produce a rotati

View Question The logic gate equivalent to the given logic
circuit is :-

View Question The area of a square is 5.29 cm2. The area of
7 such squares taking into account the
significant figures is :-

View Question 50 W/m2 energy density of sunlight is normally
incident on the surface of a solar panel. Some
part of incident energy (2

View Question The physical sizes of the transmitter and
receiver antenna in a communication system
are :-

View Question Four point charges –q, +q, +q and –q are placed
on y-axis at y = –2d, y = –d, y = +d and
y = +2d, respectively. The magn

View Question The specific heats, CP and CV of a gas of
diatomic molecules, A, are given (in units of
J mol–1 K–1) by 29 and 22, resp

View Question The position vector of a particle changes with
time according to the relation
$$\overrightarrow r (t) = 15{t^2}\widehat

View Question A test particle is moving in a circular orbit in
the gravitational field produced by a mass
density $$\rho (r) = {K \ove

View Question A wooden block floating in a bucket of water
has 4/5 of its volume submerged. When certain
amount of an oil is poured in

View Question A particle of mass 'm' is moving with speed '2v'
and collides with a mass '2m' moving with
speed 'v' in the same directi

View Question Two cars A and B are moving away from each
other in opposite directions. Both the cars are
moving with a speed of 20 ms–

View Question A wedge of mass M = 4m lies on a frictionless
plane. A particle of mass m approaches the
wedge with speed v. There is no

View Question A He+ ion is in its first excited state. Its
ionization energy is :-

View Question Two materials having coefficients of thermal
conductivity '3K' and 'K' and thickness 'd' and
'3d', respectively, are joi

View Question A thin smooth rod of length L and mass M is
rotating freely with angular speed $$\omega $$0 about an
axis perpendicular

View Question The parallel combination of two air filled
parallel plate capacitors of capacitance C and
nC is connected to a battery o

View Question In a conductor, if the number of conduction
electrons per unit volume is 8.5 × 1028 m–3 and
mean free time is 25ƒs (femt

View Question A string 2.0 m long and fixed at its ends is
driven by a 240 Hz vibrator. The string vibrates
in its third harmonic mode

View Question