JEE Main 2019 (Online) 9th January Evening Slot

Paper was held on
Wed, Jan 9, 2019 9:30 AM

## Chemistry

The entropy change associated with the conversion of 1 kg of ice at 273 K to water vapours at 383 K is :
(Specific heat

View Question For the following reaction, in the mass of water produced from 445 g of C57H110O6 is :
2C57H110O6(s) + 163 O2(g) $$ \to

View Question Which of the following conditions in drinking water causes methemoglobinemia?

View Question The correct match between Item I and Item II is :
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View Question The metal that forms nitride by reacting directly with N2 of air, is :

View Question For coagulation of arsenious sulphate sol, which one of the following salt solution will be most effective ?

View Question The complex that has highest crystal field splitting energy ($$\Delta $$), is :

View Question The pH of rain water, is approximately :

View Question For the reaction, 2A + B $$ \to $$ products, when the concentrations of A and B both were doubled, the rate of the

View Question If the standard electrode potential for a cell is 2 V at 300 K, the equilibrium constant (K) for the reaction
Zn(s) + C

View Question The temporary hardness of water is due to :

View Question In which of the following process, the bond order has increased and paramagnetic character has charged to diamagnetic ?

View Question Which of the following combination of statements is true regarding the interpretation of the atomic orbitals ?
(a) An e

View Question Good reducing nature of H3PO2 is attributed to the presence of :

View Question The transition element that has lowest enthalpy of atomisation, is :

View Question When the first electron gain enthalpy $$\left( {{\Delta _{eg}}H} \right)$$ of oxygen is $$-$$ 141 kJ/mol, its second ele

View Question At 100oC, copper (Cu) has FCC unit cell structure with cell edge length of x $$\mathop A\limits^o $$. What is the approx

View Question A solution containing 62 g ethylene glycol in 250 g water is cooled to $$-$$ 10oC. If Kf for water is 1.86 K kg mol$$-$$

View Question Homoleptic octahedral complexes of a metal ion 'M3+' with three monodenate ligands L1, L2 and L3 adsorb wavelenths in th

View Question The major product in the following reaction is :

View Question The major product of the following reaction is :

View Question The major product of the following reaction is :

View Question The major product obtained in the following reaction is :

View Question Consider the following reversible chemical reactions :
The relation between K1 and K2 is :

View Question The correct sequence of amino acids present in the tripeptide given below is :

View Question The products formed in the reaction of cumene with O2 followed by treatment with dil. HCl are :

View Question The tests performed on compound X and their inferences are :
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View Question Which of the following compounds is not aromatic ?

View Question The correct statement regarding the given Ellingham diagram is :

View Question The increasing basicity order of the following compounds is :

View Question ## Mathematics

The sum of the following series
$$1 + 6 + {{9\left( {{1^2} + {2^2} + {3^2}} \right)} \over 7} + {{12\left( {{1^2} + {2^2

View Question For each x$$ \in $$R, let [x] be the greatest integer less than or equal to x.
Then $$\mathop {\lim }\limits_{x \to {0^

View Question If x = sin$$-$$1(sin10) and y = cos$$-$$1(cos10), then y $$-$$ x is equal to :

View Question If 0 $$ \le $$ x < $${\pi \over 2}$$, then the number of values of x for which sin x $$-$$ sin 2x +

View Question Let f : [0,1] $$ \to $$ R be such that f(xy) = f(x).f(y), for all x, y $$ \in $$ [0, 1], and f(0) $$ \ne $$ 0. If

View Question The area of the region
A = {(x, y) : 0 $$ \le $$ y $$ \le $$x |x| + 1 and $$-$$1 $$ \le $$ x $$ \

View Question The coefficient of t4 in the expansion of $${\left( {{{1 - {t^6}} \over {1 - t}}} \right)^3}$$ is :

View Question If the system of linear equations
x $$-$$ 4y + 7z = g
3y $$-$$ 5z = h
$$-$$2x

View Question Let z0 be a root of the quadratic equation, x2 + x + 1 = 0, If z = 3 + 6iz$$_0^{81}$$ $$-$$ 3iz$$_0^{93}$$, then arg z

View Question If both the roots of the quadratic equation x2 $$-$$ mx + 4 = 0 are real and distinct and they lie in the interval [1, 5

View Question Let S be the set of all triangles in the xy-plane, each having one vertex at the origin and the other two vertices lie o

View Question The logical statement
[ $$ \sim $$ ( $$ \sim $$ p $$ \vee $$ q) $$ \vee $$ (p $$ \wedge $$ r)] $$ \wedge $$ ($$ \sim $$

View Question Let a, b and c be the 7th, 11th and 13th terms respectively of a non-constant A.P. If these are also three consecutive

View Question The equation of the plane containing the straight line $${x \over 2} = {y \over 3} = {z \over 4}$$ and perpendicular to

View Question A data consists of n observations : x1, x2, . . . . . . ., xn.
If $$\sum\limi

View Question If $$A = \left[ {\matrix{
{{e^t}} & {{e^{ - t}}\cos t} & {{e^{ - t}}\sin t} \cr
{{e^t}}

View Question If $$f\left( x \right) = \int {{{5{x^8} + 7{x^6}} \over {{{\left( {{x^2} + 1 + 2{x^7}} \right)}^2}}}} \

View Question Let f be a differentiable function from
R to R such that $$\left| {f\left( x \right) - f\left( y \right)} \right| \le 2

View Question If x $$=$$ 3 tan t and y $$=$$ 3 sec t, then the value of $${{{d^2}y} \over {d{x^2}}}$$ at t $$ = {\pi

View Question The number of natural numbers less than 7,000 which can be formed by using the digits 0, 1, 3, 7, 9 (repitition of digit

View Question A hyperbola has its centre at the origin, passes through the point (4, 2) and has transverse axis of length 4 along the

View Question If the lines x = ay + b, z = cy + d and x = a'z + b', y = c'z + d' are perpendicular, then :

View Question Let A(4, $$-$$ 4) and B(9, 6) be points on the parabola, y2 = 4x. Let C be chosen on the arc AOB of the parabola, where

View Question If $$\int\limits_0^{{\pi \over 3}} {{{\tan \theta } \over {\sqrt {2k\,\sec \theta } }}} \,d\theta = 1

View Question Let the equations of two sides of a triangle be 3x $$-$$ 2y + 6 = 0 and 4x + 5y $$-$$ 20 = 0. If the orthocentre of this

View Question Let A = {x $$ \in $$ R : x is not a positive integer}.
Define a function $$f$$ : A $$ \to $$ R as

View Question The number of all possible positive integral values of $$\alpha $$ for which the roots of the quadratic equation,

View Question If the circles
x2 + y2 $$-$$ 16x $$-$$ 20y + 164 = r2
and (x $$-$$ 4)2 + (y $$-$$ 7)2 = 36
inte

View Question An urn contains 5 red and 2 green balls. A ball is drawn at random from the urn. If the drawn ball is green, then a red

View Question Let $$\overrightarrow a = \widehat i + \widehat j + \sqrt 2 \widehat k,$$ $$\overrightarrow

View Question ## Physics

At a given instant, say t = 0, two radioactive substance A and B have equal activities. the ratio $${{{R_B}} \over {{R_

View Question A power transmission line feeds input power at 2300 V to a srep down transformer with its primary windings having 4000 t

View Question A force acts on a 2 kg object so that its position is given as a function of time as x = 3t2 + 5. What is the work done

View Question The energy associated with electric field is (UE) and with magnetic field is (UB) for an electromagnetic wave in free sp

View Question Two point charges q1$$\left( {\sqrt {10} \mu C} \right)$$ and q2($$-$$ 25 $$\mu $$C) are placed on the x-axis at x = 1 m

View Question A particle having the same charge as of electron moves in a ciurcular path of radius 0.5 cm under the influence of a mag

View Question Expression for time in terms of G(universal gravitional constant), h (Planck constant) and c (speed of light) is proport

View Question The top of a water tank is open to air and its water level is mainted. It is giving out 0.74 m3 water per minute through

View Question The energy required to take a satellite to a height 'h' above Earth surface (radius of Earth = 6.4 $$ \times $$ 103 km)

View Question Two Carnot engines A and B are operated in series. The first one, A, receives heat at T1 (= 600 K) and rejects to a rese

View Question A particle is executing simple harmonic motion (SHM) of amplitude A, along the x-axis, about x = 0. When its potential E

View Question A series AC circuit containing an inductor (20 mH), a capacitor (120 $$\mu $$F) and a resistor (60 $$\Omega $$) is drive

View Question A mass of 10 kg is suspended vertically by a rope from the roof. When a horizontal force is applied on the rope at some

View Question A 15 g mass of nitrogen gas is enclosed in a vessel at a temperature 27oC. Amount of heat transferred to the gas, so tha

View Question In a Young's double slit experiment, the slits are placed 0.320 mm apart. Light of wavelength $$\lambda $$ = 500 nm is i

View Question Two plane mirrors are inclined to each other such that a ray of light incident on the first mirror (M1) and parallel to

View Question One of the two identical conducting wires of length L is bent in the form of a circular loop and the other one into a ci

View Question A rod of mass 'M' and length '2L' is suspended at its middle by a wire. It exhibits torsional oscillations; If two masse

View Question Charge is distributed within a sphere of radius R with a volume charge density $$\rho \left( r \right) = {A \over {{r^2}

View Question The pitch and the number of divisions, on the circular scale, for a given screw gauge are 0.5 mm and 100 respectively.

View Question In a car race on straight road, car A takes a time t less than car B at the finish and passes finishing point with a spe

View Question A musician using an open flute of length 50 cm producess second harmonic sound waves. A person runs towards the musician

View Question The magnetic field associated with a light wave is given, at the origin, by B = B0 [sin(3.14 $$ \times $$ 107)ct + sin(6

View Question In a communication system operating at wavelength 800 nm, only one percent of source frequency is available as signal ba

View Question The position co-ordinates of a particle moving in a 3-D coordinate system is given by
x = a cos$$\omega $$t
y = a sin$$

View Question Ge and Si diodes start conducting at 0.3 V and 0.7 V respectively. In the following figure if Ge diode connection are re

View Question A rod of length 50 cm is pivoted at one end. It is raised such that if makes an angle of 30o from the horizontal as sho

View Question In the given circuit the the internal resistance of the 18 V cell is negligible. If R1 = 400 $$\Omega $$, R3 = 100 $$\Om

View Question A parallel plate capacitor with square plates is filled with four dielecytrics of dielectrics constants K1, K2, K3, K4 a

View Question A carbon resistance has a following colour code. What is the value of the resistance ?

View Question