JEE Main 2019 (Online) 11th January Morning Slot

Paper was held on
Fri, Jan 11, 2019 3:30 AM

## Chemistry

The amphoteric hydroxide is :

View Question If a reaction follows the Arrhenius equation, the plot ln k vs $${1 \over {\left( {RT} \right)}}$$ gives straight line w

View Question Match the metals (column I) with the coordination compound(s)/enzyme(s) (column II)
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View Question The concentration of dissolved oxygen (DO) in cold water can go upto :

View Question The chloride that CANNOT get hydrolysed is :

View Question Peroxyacetyl nitrate (PAN), an eye irritant is produced by :

View Question The correct statements among (a) to (d) regarding H2 as a fuel are :
(a) It produces less pollutants th

View Question The element that usually does NOT show variable oxidation states is :

View Question For the cell Zn(s) |Zn2+ (aq)| |Mx+ (aq)| M(s), different half cells and their standard electrode potentials are given b

View Question The correct order of the atomic radii of C, Cs, Al, and S is :

View Question A 10 mg effervescent tablet containing sodium bicarbonate and oxalic acid releases 0.25 ml of CO2 at T = 298.15 K and p

View Question Match the ores (column A) with the metals (column B) :
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View Question NaH is an example of :

View Question An example of solid sol is :

View Question Consider the reaction
N2(g) + 3H2(g) $$\rightleftharpoons$$ 2NH3(g)
The equilibrium constant of the above reaction

View Question The correct match between item (I) and item (II) is :
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View Question For the chemical reaction X $$\rightleftharpoons$$ Y, the standard reaction Gibbs energy depends on temperature T (in

View Question A solid having density of 9$$ \times $$103 kg m–3 forms face centred cubic crystals of edge length $$200\sqrt 2 $$ pm. W

View Question Heat treatment of muscular pain involves radiation of wavelength of about 900 nm. Which spectral line of H atom is suita

View Question An organic compound is estimated through Duma's method and was found to evolve 6 moles of CO2. 4 moles of H2O and 1 mole

View Question The correct match between items I and II is :
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View Question The freezing point of a diluted milk sample is found to be –0.2oC, while it should have been –0.5oC for pure milk. How m

View Question Two blocks of the same metal having same mass and at temperature T1 and T2, respectively, are brought in contact with ea

View Question Among the following compounds, which one is found in RNA ?

View Question The major product of the following reaction is :

View Question Which compound (s) out of the following is/are not aromatic ?

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 of the following reaction is :

View Question The polymer obtained from the following reaction is :

View Question ## Mathematics

Let $$f\left( x \right) = \left\{ {\matrix{
{ - 1} & { - 2 \le x < 0} \cr
{{x^2} - 1,} & {0 \le x \le

View Question The value of r for which 20Cr 20C0 + 20Cr$$-$$1 20C1 + 20Cr$$-$$2 20C2 + .

View Question The value of the integral $$\int\limits_{ - 2}^2 {{{{{\sin }^2}x} \over { \left[ {{x \over \pi }} \right] + {1 \over 2}}

View Question The sum of an infinite geometric series with positive terms is 3 and the sum of the cubes of its terms is $${{27} \over

View Question In a triangle, the sum of lengths of two sides is x and the product of the lengths of the same two sides is y. If x2 – c

View Question If the system of linear equations
2x + 2y + 3z = a
3x – y + 5z = b
x – 3y + 2z = c
where a, b, c are non zero real numbe

View Question If $$\int {{{\sqrt {1 - {x^2}} } \over {{x^4}}}} $$ dx = A(x)$${\left( {\sqrt {1 - {x^2}} } \right)^m}$$ + C,

View Question Equation of a common tangent to the parabola y2 = 4x and the hyperbola xy = 2 is :

View Question Let $$\overrightarrow a = \widehat i + 2\widehat j + 4\widehat k,$$ $$\overrightarrow b = \widehat i +

View Question The plane containing the line $${{x - 3} \over 2} = {{y + 2} \over { - 1}} = {{z - 1} \over 3}$$ and also containing it

View Question The sum of the real values of x for which the middle term in the binomial expansion of $${\left( {{{{x^3}} \over 3}

View Question The outcome of each of 30 items was observed; 10 items gave an outcome $${1 \over 2}$$ – d each, 10 items gave outcome $

View Question If q is false and p $$ \wedge $$ q $$ \leftrightarrow $$ r is true, then which one of the following statements is a tau

View Question The maximum value of the function f(x) = 3x3 – 18x2 + 27x – 40 on the set S = $$\left\{ {x\, \in R:{x^2} + 30 \le 11x}

View Question The straight line x + 2y = 1 meets the coordinate axes at A and B. A circle is drawn through A, B and the origin. Then t

View Question If one real root of the quadratic equation 81x2 + kx + 256 = 0 is cube of the other root, then a value of k is

View Question A square is inscribed in the circle x2 + y2
– 6x + 8y – 103 = 0 with its sides parallel to the coordinate axes.
Then the

View Question If y(x) is the solution of the differential equation $${{dy} \over {dx}} + \left( {{{2x + 1} \over x}} \right)y = {

View Question Let [x] denote the greatest integer less than or equal to x. Then $$\mathop {\lim }\limits_{x \to 0} {{\tan \left( {\pi

View Question The direction ratios of normal to the plane through the points (0, –1, 0) and (0, 0, 1) and making an angle $${\pi \ove

View Question Let A = $$\left( {\matrix{
0 & {2q} & r \cr
p & q & { - r} \cr
p & { - q} & r \cr

View Question The area (in sq. units) of the region bounded by the curve x2 = 4y and the straight line x = 4y – 2 is :

View Question If xloge(logex) $$-$$ x2 + y2 = 4(y > 0), then $${{dy} \over {dx}}$$ at x = e is equal to :

View Question If tangents are drawn to the ellipse x2 + 2y2 = 2 at all points on the ellipse other than its four vertices then the m

View Question Let f : R $$ \to $$ R be defined by f(x) = $${x \over {1 + {x^2}}},x \in R$$. Then the range of f is :

View Question Let fk(x) = $${1 \over k}\left( {{{\sin }^k}x + {{\cos }^k}x} \right)$$ for k = 1, 2, 3, ... Then for all x $$ \in $$ R,

View Question Let a1, a2, . . . . . ., a10 be a G.P. If $${{{a_3}} \over {{a_1}}} = 25,$$ then $${{{a_9}} \over {{a_5

View Question Let $${\left( { - 2 - {1 \over 3}i} \right)^3} = {{x + iy} \over {27}}\left( {i = \sqrt { - 1} } \right),\,\,$$ where x

View Question Two integers are selected at random from the set {1, 2, ...., 11}. Given that the sum of selected numbers is even, the c

View Question Two circles with equal radii are intersecting at the points (0, 1) and (0, –1). The tangent at the point (0, 1) to one o

View Question ## Physics

A particle undergoing simple harmonic motion has time dependent displacement given by x(t) = Asin$${{\pi t} \over {90}}$

View Question A gas mixture consists of 3 moles of oxygen and 5 moles of argon at temperature T. considering only translational and ro

View Question A rigid diatomic ideal gas undergoes an adiabatic process at room temperature. The relation between temperature and volu

View Question Ice at –20oC is added to 50 g of water at 40oC. When the temperature of the mixture reaches 0oC, it is found that 20 g o

View Question In a Young's double slit experiment, the path difference, at a certain point on the screen, between two interfering wave

View Question In an experiment, electrons are accelerated, from rest, by applying a voltage of 500 V. Calculate the radius of the path

View Question A hydrogen atom, initially in the ground state is excited by absorbing a photon of wavelength 980$$\mathop A\limits^ \ci

View Question A satellite is revolving in a circular orbit at a height h form the earth surface, such that h < < R where R is th

View Question An amplitude modulated signal is given by V(t) = 10[1 + 0.3cos(2.2 $$ \times $$ 104
t)] sin(5.5 $$ \times $$ 105
t). Her

View Question An object is at a distance of 20 m from a convex lens of focal length 0.3 m. The lens forms an image of the object. If t

View Question If the de Broglie wavelength of an electron is equal to the 10–3 times the wavelength of a photon of frequency 6 $$ \t

View Question There are two long co-axial solenoids of same length $$l$$. The inner and outer coils have radii r1 and r2 and number of

View Question A particle is moving along a circular path with a constant speed of 10 ms–1. What is the magnitude of the change in velo

View Question The force of interaction between two atoms is given by F = $$\alpha $$$$\beta $$exp $$\left( { - {{{x^2}} \over {\alpha

View Question Two equal resistances when connected in series to a battery, consume electric power of 60 W. If these resistances are no

View Question A body of mass 1 kg falls freely from a height of 100 m, on a platform mass 3 kg which is mounted on a spring having spr

View Question A liquid of density $$\rho $$ is coming out of a hose pipe of radius a with horizontal speed $$\upsilon $$ and hits a me

View Question A body is projected at t = 0 with a velocity 10 ms–1
at an angle of 60o with the horizontal. The radius of curvature of

View Question Equation of travelling wave on a stretched string of linear density 5 g/m is y = 0.03 sin(450 t – 9x) where distance and

View Question An electromagnetic wave of intensity 50 Wm–2 enters in a medium of refractive index 'n' without any loss. The ratio of t

View Question The variation of refractive index of a crown glass thin prism with wavelength of the incident light is shown. Which of t

View Question In the figure shown below, the charge on the left plate of the 10$$\mu $$F capacitor is –30$$\mu $$C. The charge on the

View Question Three charges Q, + q and + q are placed at the vertices of a right-angle isosceles triangle as shown below. The net elec

View Question The given graph shows variation (with distance r form centre) of :

View Question The resistance of the meter bridge AB in given figure is 4 $$\Omega $$. With a cell of emf $$\varepsilon $$ = 0.5 V and

View Question In the circuit shown,
the switch S1 is closed at time t = 0 and the switch S2 is kept open. At some later time(t0), th

View Question In a Wheatstone bridge(see fig.), Resistances P and Q are approximately equal. When R = 400 $$\Omega $$, the bridge
is b

View Question A slab is subjected to two forces $$\overrightarrow {{F_1}} $$ and $$\overrightarrow {{F_2}} $$ of same magnitude F as

View Question An equilateral triangle ABC is cut from a thin solid sheet of wood. (see figure) D, E and F are the mid-points of its si

View Question In the given circuit the current through Zener Diode is close to:

View Question