JEE Main 2019 (Online) 10th January Morning Slot

Paper was held on
Thu, Jan 10, 2019 3:30 AM

## Chemistry

A process has $$\Delta $$H = 200 J mol–1 and $$\Delta $$S = 40 JK–1 mol–1. Out of the values given below, choose the min

View Question A mixture of 100 m mol of Ca(OH)2 and 2 g of sodium sulphate was dissolved in water and the volume was made up to 100 mL

View Question The electronegativity of aluminium is similar to :

View Question The values of Kp/Kc for the following reactions at 300 K are, respectively : (At 300 K, RT = 24.62 dm3 atm mol–1)
N2(g)

View Question If dichloromethane (DCM) and water (H2O) are used for differential extraction, which one of the following statements is

View Question Two pi and half sigma bonds are present in :

View Question Wilkinson catalyst is : (Et = C2H5)

View Question The effect of lanthanoid contraction in the lanthanoid series of elements by and large means :

View Question Liquids A and B form an ideal solution in the entire composition range. At 350 K, the vaapor pressures of pure A and pur

View Question Consider the following reduction processes :
Zn2+ + 2e– $$ \to $$ Zn(s) ; Eo = – 0.76 V
Ca2+ + 2e– $$ \to $$ Ca(s); Eo =

View Question The type of hybridisation and number of lone pair (s) of electrons of Xe in XeOF4, respectively, are:

View Question Which hydrogen in compound (E) is easily replaceable during bromination reaction in presence of light ?

View Question The increasing order of the pKa values of the following compounds is :

View Question Which of the graphs shown below does not represent the relationship between incident light and the electron ejected from

View Question Consider the given plots for a reaction obeying Arrhenius equation (0oC < T < 300oC) : (K and Ea are rate constant

View Question Which dicarboxylic acid in presence of a dehydrating agent is least reactive to give an anhydride?

View Question The major product of the following reaction is

View Question The major product 'X' formed in the following reaction is :

View Question The correct structure of product 'P' in the following reactions is :

View Question The major product of the following reaction is :

View Question The decreasing order of ease of alkaline hydrolysis for the following esters in

View Question The total number of isomers for a square planar complex [M(F)(Cl)(SCN)(NO2)] is

View Question The major product formed in the reaction given below will be :

View Question ## Mathematics

In a class of 140 students numbered 1 to 140, all even numbered students opted Mathematics course, those whose number is

View Question Let $$\overrightarrow a = 2\widehat i + {\lambda _1}\widehat j + 3\widehat k,\,\,$$ $$\overrightarrow b =

View Question Let n $$ \ge $$ 2 be a natural number and $$0 < \theta < {\pi \over 2}.$$ Then $$\int {{{{{\left( {{{\sin }^n}\t

View Question The mean of five observations is 5 and their variance is 9.20. If three of the given five observations are 1, 3 and 8, t

View Question If the system of equations
x + y + z = 5
x + 2y + 3z = 9
x + 3y + az = $$\beta $$
has infinitely many solutions, then $$

View Question An unbiased coin is tossed. If the outcome is a head then a pair of unbiased dice is rolled and the sum of the numbers o

View Question If 5, 5r, 5r2 are the lengths of the sides of a triangle, then r cannot be equal to :

View Question Let f : R $$ \to $$ R be a function such that f(x) = x3 + x2f'(1) + xf''(2) + f'''(3), x $$ \in $$ R. Then f(2) equals

View Question If $${{dy} \over {dx}} + {3 \over {{{\cos }^2}x}}y = {1 \over {{{\cos }^2}x}},\,\,x \in \left( {{{ - \pi } \over 3

View Question Consider the quadratic equation (c – 5)x2 – 2cx + (c – 4) = 0, c $$ \ne $$ 5. Let S be the set of all integral values of

View Question The shortest distance between the point $$\left( {{3 \over 2},0} \right)$$ and the curve y = $$\s

View Question A point P moves on the line 2x – 3y + 4 = 0. If Q(1, 4) and R (3, – 2) are fixed points, then the locus of the centroid

View Question The sum of all two digit positive numbers which when divided by 7 yield 2 or 5 as remainder is -

View Question Let z1 and z2 be any two non-zero complex numbers such that $$3\left| {{z_1}} \right| = 4\left| {{z_2}} \rig

View Question For each t $$ \in $$ R , let [t] be the greatest integer less than or equal to t
Then $$\mathop {\lim }\limit

View Question Let $${\rm I} = \int\limits_a^b {\left( {{x^4} - 2{x^2}} \right)} dx.$$ If I is minimum then the ordere

View Question If the area enclosed between the curves y = kx2 and x = ky2, (k > 0), is 1 square unit. Then k is -

View Question If the line 3x + 4y – 24 = 0 intersects the x-axis at the point A and the y-axis at the point B, then the incentre of th

View Question If the third term in the binomial expansion of $${\left( {1 + {x^{{{\log }_2}x}}} \right)^5}$$ equals 2560, then a possi

View Question Let d $$ \in $$ R, and
$$A = \left[ {\matrix{
{ - 2} & {4 + d} & {\left( {\sin \theta } \rig

View Question Let $$f\left( x \right) = \left\{ {\matrix{
{\max \left\{ {\left| x \right|,{x^2}} \right\}} & {\left|

View Question ## Physics

Two guns A and B can fire bullets at speeds 1 km/s and 2 km/s respectively. From a point on a horizontal ground, they ar

View Question A heat source at T = 103 K is connected to another heat reservoir at T = 102 K by a copper slab which is 1 mthick. Given

View Question A satellite is moving with a constant speed v in circular orbit around the earth. An object of mass ‘m’ is ejected from

View Question In the cube of side ‘a’ shown in the figure, the vector from the central point of the face ABOD to the central point of

View Question A parallel plate capacitor is of area 6 cm2
and a separation 3 mm. The gap is filled with three dielectric
materials of

View Question To mop-clean a floor, a cleaning machine presses a circular mop of radius R vertically down with a total force F and rot

View Question A magnet of total magnetic moment 10-2 $${\widehat i}$$ A-m2 is placed in a time varying magnetic field, B$${\widehat i}

View Question Water flows into a large tank with flat bottom at the rate of 10–4m3s–1. Water is also leaking out of a hole ofarea 1 cm

View Question In a Young’s double slit experiment with slit separation 0.1 mm, one observes a bright fringe at angle $${1 \over {40}}

View Question A solid metal cube of edge length 2 cm is moving in a positive y-direction at a constant speed of 6 m/s. There is a unif

View Question The density of a material in SI units is 128 kg m–3
. In certain units in which the unit of length is 25 cm and the unit

View Question An insulating thin rod of length $$l$$ has a linear charge density $$\rho \left( x \right)$$ = $${\rho _0}{x \over l}$$

View Question A uniform metallic wire has a resistance of 18 $$\Omega $$ and is bent into an equilateral triangle. Then, the resistanc

View Question A plano convex lens of refractive index $$\mu $$1 and focal length ƒ1 is kept in contact with another plano concave lens

View Question In an electron microscope, the resolution that can be achieved is of the order of the wavelength of electrons used. To r

View Question A homogeneous solid cylindrical roller of radius R and mass M is pulled on a cricket pitch by a horizontal force. Assumi

View Question A string of length 1 m and mass 5 g is fixed at both ends. The tension in the string is 8.0 N. The string is set into vi

View Question If the magnetic field of a plane electromagnetic wave is given by (the speed of light = 3 × 108 B = 100 × 10–6
sin $$\l

View Question A 2 W carbon resistor is color coded with green, black, red and brown respectively. The maximum current which can be pas

View Question A charge Q is distributed over three concentric spherical shells of radii a, b, c (a < b < c) such that their surf

View Question A piece of wood of mass 0.03 kg is dropped from the top of a 100 m height building. At the same time, a bullet of mass 0

View Question A block of mass m is kept on a platform which starts from rest with constant acceleration g/2 upward, as shown in figure

View Question Two electric dipoles, A, B with respective dipole moments $${\overrightarrow d _A} = - 4qai$$ and $${\overrightarrow d

View Question To get output 1 at R, for the given logic gate circuit the input values must be

View Question In the given circuit the cells have zero internal resistance. The currents (in Amperes) passing through resistance R1 an

View Question