JEE Main 2019 (Online) 12th January Evening Slot

Paper was held on
Sat, Jan 12, 2019 9:30 AM

## Chemistry

$$ \wedge _m^ \circ $$ for NaCl, HCl and NaA are 126.4, 425.9 and 100.5 S cm2 mol–1, respectively. If the conductivity

View Question The major product of the following reaction is –

View Question The major product in the following conversion is –

View Question The major product of the following reaction is –

View Question Molecules of benzoic acid (C6H5COOH) dimerise in benzene. 'w' g of the acid dissolved in 30 g of benzene shows a depress

View Question The combination of plots which does not represent isothermal expansion of an ideal gas is –

View Question The element that does NOT show catenation is :

View Question The aldehydes which will not form Grignard product with one equivalent Grignard reagents are -

View Question If the de Broglie wavelength of the electron in nth Bohr orbit in a hydrogenic atom is equal to 1.5 $$\pi $$a0 (a0 is Bo

View Question Given
(i) C (graphite) + O2(g) $$ \to $$ CO2(g); $$\Delta $$rH$$^\Theta $$ = x kJ mol$$-$$1
(ii)

View Question The upper stratosphere consisting of the ozone layer protects us from sun's radiation that falls in the wavelength regio

View Question 8 g of NaOH is dissolved in 18g of H2O. Mole fraction of NaOH in solution and molality (in mol kg–1) of the solution res

View Question The increasing order of the reactivity of the following with LiAlH4 is

View Question For a reaction consider the plot of $$\ell $$n k versus 1/T given in the figure. If the rate constant of this reaction a

View Question If Ksp of Ag2CO3 is 8 $$ \times $$ 10–12, the molar solubility of Ag2CO3 in 0.1 M AgNO3 is -

View Question The correct structure of histidine in a strongly acidic solution (pH = 2) is -

View Question The element that shows greater ability to form p$$\pi $$-p$$\pi $$ multiple bonds, is :

View Question The major product of the following reaction is :

View Question The correct order of atomic radii is :

View Question The magnetic moment of an octahedral homoleptic Mn(II) complex is 5.9 BM. The suitable ligand for this complex is -

View Question The major product of the following reaction is –

View Question The correct statement (s) among I to III with respect to potassium ions that are abundant within the cell fluid
is /are

View Question The major product of the following reaction is –

View Question ## Mathematics

$$\mathop {\lim }\limits_{x \to {1^ - }} {{\sqrt \pi - \sqrt {2{{\sin }^{ - 1}}x} } \over {\sqrt {1 - x} }}$$ is equal

View Question There are m men and two women participating in a chess tournament. Each participant plays two games with every other par

View Question If a curve passes through the point (1, –2) and has slope of the tangent at any point (x, y) on it as $${{{x^2} - 2y} \o

View Question In a game, a man wins Rs. 100 if he gets 5 or 6 on a throw of a fair die and loses Rs. 50 for getting any other number o

View Question The integral $$\int\limits_1^e {\left\{ {{{\left( {{x \over e}} \right)}^{2x}} - {{\left( {{e \over x}} \right)}^x}} \ri

View Question If a circle of radius R passes through the origin O and intersects the coordinates axes at A and B, then the
locus of th

View Question If sin4$$\alpha $$ + 4 cos4$$\beta $$ + 2 = 4$$\sqrt 2 $$ sin $$\alpha $$ cos $$\beta $$; $$\alpha $$, $$\beta $$ $$ \in

View Question Let S and S' be the foci of an ellipse and B be any one of the extremities of its minor axis. If $$\Delta $$S'BS is a ri

View Question The integral $$\int {{{3{x^{13}} + 2{x^{11}}} \over {{{\left( {2{x^4} + 3{x^2} + 1} \right)}^4}}}} \,dx$$ is equal to :

View Question If the function f given by f(x) = x3 – 3(a – 2)x2 + 3ax + 7, for some a$$ \in $$R is increasing in (0, 1] and decreasin

View Question Let Z be the set of integers.
If A = {x $$ \in $$ Z : 2(x + 2) (x2 $$-$$ 5x + 6) = 1} and
B = {x $$ \in $$ Z : $$-$$

View Question In a class of 60 students, 40 opted for NCC, 30 opted for NSS and 20 opted for both NCC and NSS. If one of these student

View Question If A = $$\left[ {\matrix{
1 & {\sin \theta } & 1 \cr
{ - \sin \theta } & 1 & {\sin \

View Question Let z1 and z2 be two complex numbers satisfying | z1 | = 9 and | z2 – 3 – 4i | = 4. Then the minimum value of
| z1 – z2

View Question If nC4, nC5 and nC6 are in A.P., then n can be :

View Question Let f be a differentiable function such that f(1) = 2 and f '(x) = f(x) for all x $$ \in $$ R R. If h(x) = f(f(x)), then

View Question If a straight line passing through the point P(–3, 4) is such that its intercepted portion between the coordinate axes i

View Question The mean and the variance of five observations are 4 and 5.20, respectively. If three of the observations are
3, 4 and 4

View Question The set of all values of $$\lambda $$ for which the system of linear equations
x – 2y – 2z = $$\lambda $$x
x + 2y + z =

View Question The number of integral values of m for which the quadratic expression, (1 + 2m)x2 – 2(1 + 3m)x + 4(1 + m), x $$ \in $$ R

View Question The total number of irrational terms in the binomial expansion of (71/5 – 31/10)60 is :

View Question ## Physics

An ideal gas is enclosed in a cylinder at pressure of 2 atm and temperature 300 K. The mean time between two successive

View Question A particle of mass 20 g is released with an initial velocity 5 m/s along the curve from the point A, as shown in the fig

View Question A galvanometer, whose resistance is 50 ohm, has 25 divisions in it. When a current of 4 $$ \times $$ 10–4 A passes throu

View Question Two satellites, A and B, have masses m and 2m respectively. A is in a circular orbit of radius R, and B is in a circular

View Question A simple harmonic motion is represented by :
y = 5 (sin 3 $$\pi $$ t + $$\sqrt 3 $$ cos 3 $$\pi $$t) cm
The amplitude an

View Question Let $$\ell $$, r, C and V represent inductance, resistance, capacitance and voltage, respectively. The dimension of $${\

View Question A block kept on a rough inclined plane, as shown in the figure, remains at rest upto a maximum force 2 N down the inclin

View Question A plano-convex lens (focal length f2, refractive index $$\mu $$2, radius of curvature R) fits exactly into a plano-conca

View Question In the given circuit diagram, the currents, I1 = – 0.3 A, I4 = 0.8 A and I5 = 0.4 A, are flowing as shown. The currents

View Question The moment of inertia of a solid sphere, about an axis parallel to its diameter and at a distance of x from it, is 'I(x)

View Question In a Frank-Hertz experiment, an electron of energy 5.6 eV passes through mercury vapour and emerges with an energy 0.7 e

View Question A load of mass M kg is suspended from a steel wire of length 2m and radius 1.0 mm in Searle's apparatus
experiment. The

View Question When a certain photosensitive surface is illuminated with monochromatic light of frequency v, the stopping
potential for

View Question A parallel plate capacitor with plates of area 1 m2 each, are at a separation of 0.1 m. If the electric field between th

View Question A vertical closed cylinder is separated into two parts by a frictionless piston of mass m and of negligible thickness. T

View Question A resonance tube is old and has jagged end. It is still used in the laboratory to determine velocity of sound in air. A

View Question An alpha-particle of mass m suffers 1-dimensional elastic collision with a nucleus at rest of unknown mass. It is scatte

View Question A 10 m long horizontal wire extends from North East to South West. It is falling with a speed of 5.0 ms–1, at right angl

View Question The mean intensity of radiation on the surface of the Sun is about 108 W/m2 . The rms value of the corresponding magnet

View Question Two particles A, B are moving on two concentric circles of radii R1 and R2 with equal angular speed $$\omega $$. At t =

View Question The charge on a capacitor plate in a circuit, as a function of time, is shown in the figure :
When is the value of curr

View Question A long cylindrical vessel is half filled with a liquid. When the vessel is rotated about its own vertical axis, the liqu

View Question A paramagnetic material has 1028 atoms/m3. Its magnetic susceptibility at temperature 350 K is 2.8 $$ \times $$ 10–4. It

View Question A soap bubble, blown by a mechanical pump at the mouth of a tube, increases in volume, with time, at a constant rate. Th

View Question In the above circuit, C = $${{\sqrt 3 } \over 2}$$$$\mu $$F, R2 = 20 $$\Omega $$, L = $${{\sqrt 3 } \over {10}}$$ H and

View Question Formation of real image using a biconvex lens is shown below :
If the whole set up is immersed in water without disturb

View Question In the circuit shown, find C if the effective capacitance of the whole circuit is to be 0.5 $$\mu $$F. All values in the

View Question