JEE Main 2020 (Online) 9th January Morning Slot
Paper was held on Thu, Jan 9, 2020 3:30 AM
View Questions

Chemistry

Identify (A) in the following reaction sequence :
View Question
For the following reactions $$A\buildrel {700K} \over \longrightarrow {\mathop{\rm Product}\nolimits} $$ $$A\mathrel{\m
View Question
The correct order of heat of combustion for following alkadienes is :
View Question
The Ksp for the following dissociation is 1.6 × 10–5 $$PbC{l_{2(s)}} \leftrightharpoons Pb_{(aq)}^{2 + } + 2Cl_{(aq)}^ -
View Question
According to the following diagram, A reduces BO2 when the temperature is :
View Question
If the magnetic moment of a dioxygen species is 1.73 B.M, it may be :
View Question
[Pd(F)(Cl)(Br)(I)]2– has n number of geometrical isomers. Then, the spin-only magnetic moment and crystal field stabilis
View Question
A chemist has 4 samples of artificial sweetener A, B, C and D. To identify these samples, he performed certain experimen
View Question
'X' melts at low temperature and is a bad conductor of electricity in both liquid and solid state. X is :
View Question
If enthalpy of atomisation for Br2(1) is x kJ/mol and bond enthalpy for Br2 is y kJ/mol, the relation between them :
View Question
The increasing order of basicity for the following intermediates is (from weak to strong)
View Question
B has a smaller first ionization enthalpy than Be. Consider the following statements : (I) It is easier to remove 2p ele
View Question
The acidic, basic and amphoteric oxides, respectively, are :
View Question
The major product Z obtained in the following reaction scheme is :
View Question
Which of these will produce the highest yield in Friedel Crafts reaction?
View Question
The compound that cannot act both as oxidising and reducing agent is :
View Question
Complex X of composition Cr(H2O)6Cln has a spin only magnetic moment of 3.83 BM. It reacts with AgNO3 and shows geometri
View Question
The de Broglie wavelength of an electron in the 4th Bohr orbit is :
View Question
The major product (Y) in the following reactions is :
View Question
The electronic configurations of bivalent europium and trivalent cerium are (atomic number : Xe = 54, Ce = 58, Eu = 63)
View Question
The hardness of a water sample containing 10–3 M MgSO4 expressed as CaCO3 equivalents (in ppm) is ______. (molar mass of
View Question
The molarity of HNO3 in a sample which has density 1.4 g/mL and mass percentage of 63% is _____. (Molecular Weight of H
View Question
108 g of silver (molar mass 108 g mol–1) is deposited at cathode from AgNO3(aq) solution by a certain quantity of electr
View Question
The mass percentage of nitrogen in histamine is _____.
View Question
How much amount of NaCl should be added to 600 g of water ($$\rho $$ = 1.00 g/mL) to decrease the freezing point of wate
View Question

Mathematics

A spherical iron ball of 10 cm radius is coated with a layer of ice of uniform thickness the melts at a rate of 50 cm3/m
View Question
If the number of five digit numbers with distinct digits and 2 at the 10th place is 336 k, then k is equal to :
View Question
Let z be complex number such that $$\left| {{{z - i} \over {z + 2i}}} \right| = 1$$ and |z| = $${5 \over 2}$$. Then the
View Question
In a box, there are 20 cards, out of which 10 are lebelled as A and the remaining 10 are labelled as B. Cards are drawn
View Question
The value of $$\int\limits_0^{2\pi } {{{x{{\sin }^8}x} \over {{{\sin }^8}x + {{\cos }^8}x}}} dx$$ is equal to :
View Question
If ƒ'(x) = tan–1(secx + tanx), $$ - {\pi \over 2} < x < {\pi \over 2}$$, and ƒ(0) = 0, then ƒ(1) is equal to :
View Question
The number of real roots of the equation, e4x + e3x – 4e2x + ex + 1 = 0 is :
View Question
If the matrices A = $$\left[ {\matrix{ 1 & 1 & 2 \cr 1 & 3 & 4 \cr 1 & { - 1} & 3
View Question
Negation of the statement : $$\sqrt 5 $$ is an integer or 5 is an irrational is :
View Question
The product $${2^{{1 \over 4}}}{.4^{{1 \over {16}}}}{.8^{{1 \over {48}}}}{.16^{{1 \over {128}}}}$$ ... to $$\infty $$ is
View Question
Let the observations xi (1 $$ \le $$ i $$ \le $$ 10) satisfy the equations, $$\sum\limits_{i = 1}^{10} {\left( {{x_1} -
View Question
A circle touches the y-axis at the point (0, 4) and passes through the point (2, 0). Which of the following lines is not
View Question
The value of $${\cos ^3}\left( {{\pi \over 8}} \right)$$$${\cos}\left( {{3\pi \over 8}} \right)$$+$${\sin ^3}\left( {{
View Question
Let ƒ be any function continuous on [a, b] and twice differentiable on (a, b). If for all x $$ \in $$ (a, b), ƒ'(x) >
View Question
If e1 and e2 are the eccentricities of the ellipse, $${{{x^2}} \over {18}} + {{{y^2}} \over 4} = 1$$ and the hyperbola,
View Question
Let C be the centroid of the triangle with vertices (3, –1), (1, 3) and (2, 4). Let P be the point of intersection of th
View Question
If for all real triplets (a, b, c), ƒ(x) = a + bx + cx2; then $$\int\limits_0^1 {f(x)dx} $$ is equal to :
View Question
The integral $$\int {{{dx} \over {{{(x + 4)}^{{8 \over 7}}}{{(x - 3)}^{{6 \over 7}}}}}} $$ is equal to : (where C is a c
View Question
The number of distinct solutions of the equation $${\log _{{1 \over 2}}}\left| {\sin x} \right| = 2 - {\log _{{1 \over
View Question
If for some $$\alpha $$ and $$\beta $$ in R, the intersection of the following three places x + 4y – 2z = 1 x + 7y – 5z
View Question
If $$f(x) = \left\{ {\matrix{ {{{\sin (a + 2)x + \sin x} \over x};} & {x < 0} \cr {b\,\,\,\,\,\,\,\,\,\,\
View Question
The coefficient of x4 is the expansion of (1 + x + x2)10 is _____.
View Question
If for x $$ \ge $$ 0, y = y(x) is the solution of the differential equation (x + 1)dy = ((x + 1)2 + y – 3)dx, y(2) = 0,
View Question
The projection of the line segment joining the points (1, –1, 3) and (2, –4, 11) on the line joining the points (–1, 2,
View Question
If the vectors, $$\overrightarrow p = \left( {a + 1} \right)\widehat i + a\widehat j + a\widehat k$$, $$\overrightarro
View Question

Physics

A quantity f is given by $$f = \sqrt {{{h{c^5}} \over G}} $$ where c is speed of light, G universal gravitational consta
View Question
Consider a force $$\overrightarrow F = - x\widehat i + y\widehat j$$ . The work done by this force in moving a particl
View Question
Consider a sphere of radius R which carries a uniform charge density $$\rho $$. If a sphere of radius $${{R \over 2}}$$
View Question
A long, straight wire of radius a carries a current distributed uniformly over its cross-section. The ratio of the magne
View Question
The electric fields of two plane electromagnetic plane waves in vacuum are given by $$\overrightarrow {{E_1}} = {E_0}\w
View Question
A body A of mass m is moving in a circular orbit of radius R about a planet. Another body B of mass $${m \over 2}$$ coll
View Question
A particle moving with kinetic energy E has de Broglie wavelength $$\lambda $$. If energy $$\Delta $$E is added to its e
View Question
Consider two ideal diatomic gases A and B at some temperature T. Molecules of the gas A are rigid, and have a mass m. Mo
View Question
If the screw on a screw-gauge is given six rotations, it moves by 3 mm on the main scale. If there are 50 divisions on t
View Question
A vessel of depth 2h is half filled with a liquid of refractive index $$2\sqrt 2 $$ and the upper half with another liqu
View Question
The aperture diameter of a telescope is 5m. The separation between the moon and the earth is 4 × 105 km. With light of w
View Question
Two particles of equal mass m have respective initial velocities $$u\widehat i$$ and $$u\left( {{{\widehat i + \widehat
View Question
Radiation, with wavelength 6561 $$\mathop A\limits^o $$ falls on a metal surface to produce photoelectrons. The electron
View Question
In the given circuit diagram, a wire is joining points B and D. The current in this wire is :
View Question
Which of the following is an equivalent cyclic process corresponding to the thermodynamic cyclic given in the figure ? w
View Question
A charged particle of mass 'm' and charge 'q' moving under the influence of uniform electric field $$E\overrightarrow i
View Question
Three harmonic waves having equal frequency $$\nu $$ and same intensity $${I_0}$$, have phase angles 0, $${\pi \over 4}
View Question
An electric dipole of moment $$\overrightarrow p = \left( { - \widehat i - 3\widehat j + 2\widehat k} \right) \times {1
View Question
Three solid spheres each of mass m and diameter d are stuck together such that the lines connecting the centres form an
View Question
Water flows in a horizontal tube (see figure). The pressure of water changes by 700 Nm–2 between A and B where the area
View Question
One end of a straight uniform 1m long bar is pivoted on horizontal table. It is released from rest when it makes an angl
View Question
In a fluorescent lamp choke (a small transformer) 100 V of reverse voltage is produced when the choke current changes un
View Question
The distance x covered by a particle in one dimensional motion varies with time t as x2 = at2 + 2bt + c. If the accelera
View Question
A body of mass m = 10 kg is attached to one end of a wire of length 0.3 m. The maximum angular speed (in rad s–1) with w
View Question
Both the diodes used in the circuit shown are assumed to be ideal and have negligible resistance when these are forward
View Question
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12