JEE Main 2021 (Online) 27th July Evening Shift

Paper was held on
Tue, Jul 27, 2021 9:30 AM

## Chemistry

Consider the above reaction, the major product "P" formed is :

View Question Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : SO2

View Question The correct order of first ionisation enthalpy is :

View Question Given below are two statements :Statement I : Hyperconjugation is a permanent effect.Statement II : Hyperconjugation in

View Question Given below are two statements :Statement I : $${[Mn{(CN)_6}]^{3 - }}$$, $${[Fe{(CN)_6}]^{3 - }}$$ and $${[Co{({C_2}{O_4

View Question To an aqueous solution containing ions such as Al3+, Zn2+, Ca2+, Fe3+, Ni2+, Ba2+ and Cu2+ was added conc. HCl, followed

View Question Compound A gives D-Galactose and D-Glucose on hydrolysis. The compound A is :

View Question $$R - CN\mathrel{\mathop{\kern0pt\longrightarrow}
\limits_{(ii){H_2}O}^{(i)DIBAL - H}} R - Y$$Consider the above reactio

View Question Consider the above reaction, and choose the correct statement :

View Question Match List - I with List - II :
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View Question What is A in the following reaction?

View Question The correct sequence of correct reagents for the following transformation is :

View Question The equilibrium constant for the reactionA(s) $$\rightleftharpoons$$ M(s) + $${1 \over 2}$$O2(g)is Kp = 4. At equilibriu

View Question When 400 mL of 0.2 M H2SO4 solution is mixed with 600 mL of 0.1 M NaOH solution, the increase in temperature of the fina

View Question 2SO2(g) + O2(g) $$\to$$ 2SO3(g)The above reaction is carried out in a vessel starting with partial pressure PSO2 = 250 m

View Question 10.0 mL of 0.05 M KMnO4 solution was consumed in a titration with 10.0 mL of given oxalic acid dihydrate solution. The s

View Question The total number of electrons in all bonding molecular orbitals of $$O_2^{2 - }$$ is ______________.(Round off to the ne

View Question 3 moles of metal complex with formula Co(en)2Cl3 gives 3 moles of silver chloride on treatment with excess of silver nit

View Question In a solvent 50% of an acid HA dimerizes and the rest dissociates. The van't Hoff factor of the acid is __________ $$\ti

View Question The dihedral angle in staggered form of Newman projection of 1, 1, 1-Trichloro ethane is ___________ degree. (Round off

View Question For the first order reaction A $$\to$$ 2B, 1 mole of reactant A gives 0.2 moles of B after 100 minutes. The half life of

View Question For the cellCu(s) | Cu2+ (aq) (0.1 M) || Ag+(aq) (0.01 M) | Ag(s)the cell potential E1 = 0.3095 VFor the cellCu(s) | Cu2

View Question ## Mathematics

The point P (a, b) undergoes the following three transformations successively :(a) reflection about the line y = x.(b) t

View Question A possible value of 'x', for which the ninth term in the expansion of $${\left\{ {{3^{{{\log }_3}\sqrt {{{25}^{x - 1}} +

View Question Let f : R $$\to$$ R be defined as $$f(x + y) + f(x - y) = 2f(x)f(y),f\left( {{1 \over 2}} \right) = - 1$$. Then, the va

View Question Let C be the set of all complex numbers. LetS1 = {z$$\in$$C : |z $$-$$ 2| $$\le$$ 1} and S2 = {z$$\in$$C : z(1 + i) + $$

View Question If $$\tan \left( {{\pi \over 9}} \right),x,\tan \left( {{{7\pi } \over {18}}} \right)$$ are in arithmetic progression a

View Question Let the mean and variance of the frequency distribution$$\matrix{
{x:} & {{x_1} = 2} & {{x_2} = 6} & {{x_

View Question The area of the region bounded by y $$-$$ x = 2 and x2 = y is equal to :

View Question Let y = y(x) be the solution of the differential equation (x $$-$$ x3)dy = (y + yx2 $$-$$ 3x4)dx, x > 2. If y(3) = 3,

View Question The value of $$\mathop {\lim }\limits_{x \to 0} \left( {{x \over {\root 8 \of {1 - \sin x} - \root 8 \of {1 + \sin x} }

View Question Two sides of a parallelogram are along the lines 4x + 5y = 0 and 7x + 2y = 0. If the equation of one of the diagonals of

View Question Let $$\alpha = \mathop {\max }\limits_{x \in R} \{ {8^{2\sin 3x}}{.4^{4\cos 3x}}\} $$ and $$\beta = \mathop {\min }\li

View Question Let $$f:[0,\infty ) \to [0,3]$$ be a function defined by $$f(x) = \left\{ {\matrix{
{\max \{ \sin t:0 \le t \le x\} ,

View Question Let N be the set of natural numbers and a relation R on N be defined by $$R = \{ (x,y) \in N \times N:{x^3} - 3{x^2}y -

View Question Consider a circle C which touches the y-axis at (0, 6) and cuts off an intercept $$6\sqrt 5 $$ on the x-axis. Then the r

View Question Let f : (a, b) $$\to$$ R be twice differentiable function such that $$f(x) = \int_a^x {g(t)dt} $$ for a differentiable f

View Question If the real part of the complex number $$z = {{3 + 2i\cos \theta } \over {1 - 3i\cos \theta }},\theta \in \left( {0,{\p

View Question If $$\int_0^\pi {({{\sin }^3}x){e^{ - {{\sin }^2}x}}dx = \alpha - {\beta \over e}\int_0^1 {\sqrt t {e^t}dt} } $$, the

View Question The number of real roots of the equation e4x $$-$$ e3x $$-$$ 4e2x $$-$$ ex + 1 = 0 is equal to ______________.

View Question Let y = y(x) be the solution of the differential equation dy = e$$\alpha$$x + y dx; $$\alpha$$ $$\in$$ N. If y(loge2) =

View Question Let n be a non-negative integer. Then the number of divisors of the form "4n + 1" of the number (10)10 . (11)11 . (13)13

View Question Let A = {n $$\in$$ N | n2 $$\le$$ n + 10,000}, B = {3k + 1 | k$$\in$$ N} an dC = {2k | k$$\in$$N}, then the sum of all t

View Question If $$A = \left[ {\matrix{
1 & 1 & 1 \cr
0 & 1 & 1 \cr
0 & 0 & 1 \cr
} } \right]

View Question ## Physics

An electron and proton are separated by a large distance. The electron starts approaching the proton with energy 3 eV. T

View Question The expected graphical representation of the variation of angle of deviation '$$\delta$$' with angle of incidence 'i' in

View Question A raindrop with radius R = 0.2 mm falls from a cloud at a height h = 2000 m above the ground. Assume that the drop is sp

View Question One mole of an ideal gas is taken through an adiabatic process where the temperature rises from 27$$^\circ$$ C to 37$$^\

View Question An object of mass 0.5 kg is executing simple harmonic motion. It amplitude is 5 cm and time period (T) is 0.2 s. What wi

View Question Match List I with List II.
List - I
List - II
(a)
Capacitance, C
(i)
$${M^

View Question Given below is the plot of a potential energy function U(x) for a system, in which a particle is in one dimensional moti

View Question A 100$$\Omega$$ resistance, a 0.1 $$\mu$$F capacitor and an inductor are connected in series across a 250 V supply at va

View Question A simple pendulum of mass 'm', length 'l' and charge '+ q' suspended in the electric field produced by two conducting pa

View Question Find the truth table for the function Y of A and B represented in the following figure.

View Question Figure A and B shown to long straight wires of circular cross-section (a and b with a < b), carrying current I which

View Question Two identical particles of mass 1 kg each go round a circle of radius R, under the action of their mutual gravitational

View Question What will be the magnitude of electric field at point O as shown in the figure? Each side of the figure is l and perpend

View Question A physical quantity 'y' is represented by the formula $$y = {m^2}{r^{ - 4}}{g^x}{l^{ - {3 \over 2}}}$$If the percentage

View Question An automobile of mass 'm' accelerates starting from origin and initially at rest, while the engine supplies constant pow

View Question The planet Mars has two moons, if one of them has a period 7 hours, 30 minutes and an orbital radius of 9.0 $$\times$$ 1

View Question A particle of mass M originally at rest is subjected to a force whose direction is constant but magnitude varies with ti

View Question The resistance of a conductor at 15$$^\circ$$C is 16$$\Omega$$ and at 100$$^\circ$$C is 20$$\Omega$$. What will be the t

View Question In the given figure, two wheels P and Q are connected by a belt B. The radius of P is three times as that of Q. In case

View Question The difference in the number of waves when yellow light propagates through air and vacuum columns of the same thickness

View Question In the given figure the magnetic flux through the loop increases according to the relation $$\phi$$B(t) = 10t2 + 20t, wh

View Question A particle executes simple harmonic motion represented by displacement function as x(t) = A sin($$\omega$$t + $$\phi$$)I

View Question A swimmer wants to cross a river from point A to point B. Line AB makes an angle of 30$$^\circ$$ with the flow of river.

View Question For the circuit shown, the value of current at time t = 3.2 s will be _________ A.[Voltage distribution V(t) is shown by

View Question A small block slides down from the top of hemisphere of radius R = 3 m as shown in the figure. The height 'h' at which t

View Question The K$$\alpha$$ X-ray of molybdenum has wavelength 0.071 nm. If the energy of a molybdenum atoms with a K electron knock

View Question The water is filled upto height of 12 m in a tank having vertical sidewalls. A hole is made in one of the walls at a dep

View Question