JEE Main 2020 (Online) 4th September Evening Slot
Paper was held on
Fri, Sep 4, 2020 9:30 AM
Chemistry
The one that can exhibit highest paramagnetic
behaviour among the following is :
gly = glycinato; bpy = 2, 2'-bipyridine
View Question The Crystal Field Stabilization Energy
(CFSE) of [CoF3(H2O)3] ($$\Delta $$0 < P) is :
View Question The process that is NOT endothermic in nature
is :
View Question The incorrect statement(s) among (a) - (c) is
(are)
(a) W(VI) is more stable than Cr(VI).
(b) In the presence of HCl, pe
View Question Among the following compounds, which one
has the shortest C – Cl bond?
View Question In the following reaction sequence, [C] is :
View Question The number of chiral centres present in
threonine is ________.
View Question A 100 mL solution was made by adding 1.43 g
of Na2CO3.xH2O. The normality of the solution
is 0.1 N. The value of x is __
View Question The number of molecules with energy greater
than the threshold energy for a reaction
increases five fold by a rise of te
View Question Consider the following equations :
2Fe2+ + H2O2 $$ \to $$ xA + yB
(in basic medium)
2MnO4- + 6H+ + 5H2O2 $$ \to $$ x'C
View Question The osmotic pressure of a solution of NaCl is
0.10 atm and that of a glucose solution is
0.20 atm. The osmotic pressure
View Question Which of the following compounds will form the
precipitate with aq. AgNO3 solution most
readily?
View Question The major product [R] in the following
sequence of reactions as :
View Question The molecule in which hybrid MOs involve only
one d-orbital of the central atom is :
View Question The major product [C] of the following reaction
sequence will be :
View Question The major product [B] in the following
reactions is :
View Question 250 mL of a waste solution obtained from the
workshop of a goldsmith contains 0.1 M AgNO3
and 0.1 M AuCl. The solution w
View Question Five moles of an ideal gas at 1 bar and 298 K
is expanded into vacuum to double the volume.
The work done is :
View Question The shortest wavelength of H atom in the
Lyman series is $$\lambda $$1. The longest wavelength in
the Balmar series of H
View Question If the equilibrium constant for A ⇌ B + C is $$K_{eq}^{(1)}$$ and that of
B + C ⇌ P is $$K_{eq}^{(2)}$$, the equilibrium
View Question The reaction in which the hybridisation of the
underlined atom is affected is :
View Question Mathematics
A test consists of 6 multiple choice questions, each having 4 alternative answers of which only one is correct. The numb
View Question If the variance of the following frequency
distribution :
Class : 10–20
View Question If the system of equations
x+y+z=2
2x+4y–z=6
3x+2y+$$\lambda $$z=$$\mu $$
has infinitely many solutions, then
View Question The integral $$\int\limits_{{\pi \over 6}}^{{\pi \over 3}} {{{\tan }^3}x.{{\sin }^2}3x\left( {2{{\sec }^2}x.{{\sin }^2
View Question In a game two players A and B take turns in throwing a pair of fair dice starting with player A and total of scores on t
View Question The area (in sq. units) of the largest rectangle ABCD whose vertices A and B lie on the x-axis and vertices C and D lie
View Question The minimum value of 2sinx + 2cosx is :
View Question Let $$f:\left( {0,\infty } \right) \to \left( {0,\infty } \right)$$ be a differentiable function such that f(1) = e and
View Question If the perpendicular bisector of the line segment joining the points P(1 ,4) and Q(k, 3) has y-intercept equal to –4, th
View Question If a and b are real numbers such that $${\left( {2 + \alpha } \right)^4} = a + b\alpha $$ where $$\alpha = {{ - 1 + i\s
View Question Suppose the vectors x1, x2 and x3 are the solutions of the system of linear equations, Ax = b when the vector b on the r
View Question If $$\overrightarrow a = 2\widehat i + \widehat j + 2\widehat k$$, then the value of
$${\left| {\widehat i \times \lef
View Question Let PQ be a diameter of the circle x2 + y2 = 9. If $$\alpha $$ and $$\beta $$ are the lengths of the perpendiculars from
View Question Let {x} and [x] denote the fractional part of x and the greatest integer $$ \le $$ x respectively of a real number x. If
View Question Let a1, a2, ..., an be a given A.P. whose common difference is an integer and Sn = a1 + a2 + .... + an. If a1 = 1, an =
View Question Let $$\mathop \cup \limits_{i = 1}^{50} {X_i} = \mathop \cup \limits_{i = 1}^n {Y_i} = T$$ where each Xi contains 10
View Question Let $$\lambda \ne 0$$ be in R. If $$\alpha $$ and $$\beta $$ are the roots of the equation, x2 - x + 2$$\lambda $$ = 0
View Question The solution of the differential equation
$${{dy} \over {dx}} - {{y + 3x} \over {{{\log }_e}\left( {y + 3x} \right)}} +
View Question The function $$f(x) = \left\{ {\matrix{
{{\pi \over 4} + {{\tan }^{ - 1}}x,} & {\left| x \right| \le 1} \cr
View Question Physics
The distance between an object and a screen is 100 cm. A lens can produce real image of the
object on the screen for two
View Question The change in the magnitude of the volume of an ideal gas when a small additional pressure $$\Delta $$P is
applied at a
View Question Orange light of wavelength 6000 $$ \times $$ 10–10 m illuminates a single slit of width 0.6 $$ \times $$ 10–4 m. The
max
View Question Two identical cylindrical vessels are kept on the ground and each contain the same liquid of density
d. The area of the
View Question The value of current i1
flowing from A to C in the circuit diagram is :
View Question In a photoelectric effect experiment, the graph of stopping potential V versus reciprocal of wavelength
obtained is show
View Question For a uniform rectangular sheet shown in the figure, the ratio of moments of inertia about the axes
perpendicular to the
View Question Four resistances 40 $$\Omega $$, 60 $$\Omega $$, 90 $$\Omega $$ and 110 $$\Omega $$ make the arms of a quadrilateral ABC
View Question A quantity x is given by $$\left( {{{IF{v^2}} \over {W{L^4}}}} \right)$$ in terms of moment of inertia I, force F, veloc
View Question The speed verses time graph for a particle is shown in the figure. The distance travelled (in m) by
the particle during
View Question Identify the operation performed by the circuit given below :
View Question A person pushes a box on a rough horizontal plateform surface. He applies a force of 200 N over a
distance of 15 m. Ther
View Question A cube of metal is subjected to a hydrostatic pressure of 4 GPa. The percentage change in the
length of the side of the
View Question The electric field of a plane electromagnetic wave is given by
$$\overrightarrow E = {E_0}\left( {\widehat x + \widehat
View Question Consider two uniform discs of the same thickness and different radii R1
= R and R2
= $$\alpha $$R made of
the same mat
View Question A series L-R circuit is connected to a battery of emf V. If the circuit is switched on at t = 0, then
the time at which
View Question Match the thermodynamic processes taking place in a system with the correct conditions. In the
table : $$\Delta $$Q is t
View Question A small ball of mass m is thrown upward with velocity u from the ground. The ball experiences a
resistive force mkv2
wh
View Question A circular coil has moment of inertia 0.8 kg m2
around any diameter and is carrying current to
produce a magnetic momen
View Question A particle of charge q and mass m is subjected to an electric field E = E0
(1 – $$a$$x2) in the x-direction,
where $$a$
View Question Find the Binding energy per neucleon for $${}_{50}^{120}Sn$$. Mass of proton mp
= 1.00783 U, mass of neutron
mn
= 1.00
View Question A capacitor C is fully charged with voltage V0. After disconnecting the voltage source, it is connected
in parallel with
View Question A body is moving in a low circular orbit about a planet of mass M and radius R. The radius of the
orbit can be taken to
View Question A paramagnetic sample shows a net magnetisation of 6 A/m when it is placed in an external
magnetic field of 0.4 T at a t
View Question