JEE Main 2018 (Online) 16th April Morning Slot
Paper was held on
Mon, Apr 16, 2018 3:30 AM
Chemistry
Which of the following statements is false ?
View Question At 320 K, a gas A2 is 20% dissociated to A(g). The standard free energy change at 320 K and 1 atm in J mol-1 is approxim
View Question The incorrect statement is :
View Question The mass of a non-volatile, non-electrolyte solute (molar mass = 50 g mol-1 ) needed to be dissolved in 114 g octane to
View Question The incorrect geometry is represented by :
View Question In Wilkinson's catalyst, the hybridization of central metal ion and its shape are respectively :
View Question Which of the following conversions involves change in both shape and hybridisation ?
View Question Among the oxides of nitrogen : N2O3, N2O4 and N2O5; the molecule(s) having nitrogen-nitrogen bond is / are :
View Question Which of the following complexes will shows geometrical isomerism ?
View Question In the extraction of copper from its sulphate ore, metal is finally obtained by the oxidation of cuprous sulphide with :
View Question A group 13 element 'X' reacts with chlorine gas to produce a compound XCl3. XCl3 is electron deficient and easily reacts
View Question When XO2 is fused with an alkali metal hydroxide in presence of an oxidizing agent such as KNO3 ; a dark green product
View Question The correct match between items of List - I and List - II is :
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View Question For standardizing NaOH solution, which of the following is used as a primary standard ?
View Question Which of the following compounds will most readily be dehydrated to give alkene under acidic condition ?
View Question Among the following, the incorrect statement is :
View Question The major product of the following reaction is :
View Question The major product of the following reaction is :
View Question The most polar compound among the following is :
View Question The major product B formed in the following reaction sequence is :
View Question In a complexometric titration of metal ion with ligand
M(Metal ion) + L(Ligand) $$ \to $$ C(Complex) end point is esti
View Question Products A and B formed in the following reactions are respectively :
View Question The major product of the following reaction is :
View Question Assuming ideal gas behaviour, the ratio of density of ammonia to that of hydrogen chloride at same temperature and press
View Question The gas phase reaction 2NO2(g) $$ \to $$ N2O4(g) is an exothermic reaction. The decomposition of N2O4, in equilibrium
View Question An unknown chlorohydrocarbon has 3.55% of chlorine. If each molecule of the hydrocarbon has one chlorine atom only; chlo
View Question When 9.65 ampere current was passed for 1.0 hour into nitrobenzene in acidic medium, the amount of p-aminophenol produce
View Question Which one of the following is not a property of physical adsorption?
View Question For which of the following processes, $$\Delta $$S is negative ?
View Question If 50% of a reaction occurs in 100 second and 75% of the reaction occurs in 200 secod, the order of this reaction is :
View Question Mathematics
Let N denote the set of all natural numbers. Define two binary relations on N as R = {(x, y) $$ \in $$ N $$ \times $$ N
View Question The least positive integer n for which $${\left( {{{1 + i\sqrt 3 } \over {1 - i\sqrt 3 }}} \right)^n} = 1,$$ is :
View Question Let p, q and r be real numbers (p $$ \ne $$ q, r $$ \ne $$ 0), such that the roots of the equation $${1 \over {x + p}}
View Question The number of numbers between 2,000 and 5,000 that can be formed with the digits 0, 1, 2, 3, 4 (repetition of digits is
View Question The number of values of k for which the system of linear equations,
(k + 2)x + 10y = k
kx + (k +3)y = k -1
has no solu
View Question Let A = $$\left[ {\matrix{
1 & 0 & 0 \cr
1 & 1 & 0 \cr
1 & 1 & 1 \cr
} } \right
View Question The coefficient of x2 in the expansion of the product
(2$$-$$x2) .((1 + 2x + 3x2)6 + (1 $$-$$ 4x2)6) is :
View Question The sum of the first 20 terms of the series
$$1 + {3 \over 2} + {7 \over 4} + {{15} \over 8} + {{31} \over {16}} + ...,
View Question Let $${1 \over {{x_1}}},{1 \over {{x_2}}},...,{1 \over {{x_n}}}\,\,$$ (xi $$ \ne $$ 0 for i = 1, 2, ..., n) be in A.P. s
View Question $$\mathop {\lim }\limits_{x \to 0} \,\,{{{{\left( {27 + x} \right)}^{{1 \over 3}}} - 3} \over {9 - {{\left( {27 + x} \ri
View Question If $$x = \sqrt {{2^{\cos e{c^{ - 1}}}}} $$ and $$y = \sqrt {{2^{se{c^{ - 1}}t}}} \,\,\left( {\left| t \right| \ge 1} \ri
View Question If the function f defined as
$$f\left( x \right) = {1 \over x} - {{k - 1} \over {{e^{2x}} - 1}},x \ne 0,$$ is continuou
View Question Let M and m be respectively the absolute maximum and the absolute minimum values of the function, f(x) = 2x3 $$-$$ 9x2
View Question If $$\int {{{\tan x} \over {1 + \tan x + {{\tan }^2}x}}dx = x - {K \over {\sqrt A }}{{\tan }^{ - 1}}} $$ $$\left( {{{K\,
View Question The differential equation representing the family of ellipse having foci eith on the x-axis or on the $$y$$-axis, center
View Question If $$f(x) = \int\limits_0^x {t\left( {\sin x - \sin t} \right)dt\,\,\,} $$ then :
View Question If the area of the region bounded by the curves, $$y = {x^2},y = {1 \over x}$$ and the lines y = 0 and x= t (t >1) is
View Question If a circle C, whose radius is 3, touches externally the circle,
$${x^2} + {y^2} + 2x - 4y - 4 = 0$$ at the point (2, 2
View Question The locus of the point of intersection of the lines, $$\sqrt 2 x - y + 4\sqrt 2 k = 0$$ and $$\sqrt 2 k\,x + k\,y - 4\sq
View Question Let P be a point on the parabola, x2 = 4y. If the distance of P from the center of the circle, x2 + y2 + 6x + 8 = 0 is m
View Question If the length of the latus rectum of an ellipse is 4 units and the distance between a focus an its nearest vertex on the
View Question If the angle between the lines, $${x \over 2} = {y \over 2} = {z \over 1}$$
and $${{5 - x} \over { - 2}} = {{7y - 14} \
View Question The sum of the intercepts on the coordinate axes of the plane passing through the point ($$-$$2, $$-2,$$ 2) and containi
View Question Let $$\overrightarrow a = \widehat i + \widehat j + \widehat k,\overrightarrow c = \widehat j - \widehat k$$ and a vec
View Question Let A, B and C be three events, which are pair-wise independent and $$\overrightarrow E $$ denotes the completement of a
View Question The mean and the standard deviation(s.d.) of five observations are9 and 0, respectively. If one of the observations is c
View Question Two different families A and B are blessed with equal numbe of children. There are 3 tickets to be distributed amongst t
View Question If an angle A of a $$\Delta $$ABC satiesfies 5 cosA + 3 = 0, then the roots of the quadratic equation, 9x2 + 27x + 20 =
View Question A man on the top of a vertical tower observes a car moving at a uniform speed towards the tower on a horizontal road. If
View Question If p $$ \to $$ ($$ \sim $$ p$$ \vee $$ $$ \sim $$ q) is false, then the truth values of p and q are respectively :
View Question Physics
The percentage errors in quantities P, Q, R and S are 0.5%, 1%, 3% and 1.5% respectively in the measurement of a physica
View Question Let $$\overrightarrow A $$ = $$\left( {\widehat i + \widehat j} \right)$$ and, $$\overrightarrow B = \left( {2\widehat
View Question Two particles of the same mass m are moving in circular orbits because of force, given by $$F\left( r \right) = {{ - 16}
View Question A body of mass m starts moving from rest along x-axis so that its velocity varies as $$\upsilon = a\sqrt s $$ where a i
View Question The relative uncertainly in the period of a satellite orbiting around the earth is 10-2. If the relative uncertainty in
View Question Suppose that the angular velocity of rotation of earth is increased. Then, as a consequence :
View Question An oscillator of mass M is at rest in its equilibrium position in a potential
V = $${1 \over 2}$$ k(x $$-$$ X)2. A par
View Question A small soap bubble of radius 4 cm is trapped inside another bubble of radius 6 cm without any contact. Let P2 be the pr
View Question A particle executes simple harmonic motion and is located at x = a, b and c at times t0, 2t0 and 3t0 respectively. The
View Question Two moles of helium are mixed with n moles of hydrogen. If $${{Cp} \over {Cv}} = {3 \over 2}$$ for the mixture, then th
View Question Two sitar strings, A and B, playing the note 'Dha' are slightly out of tune and produce beats of frequency 5 Hz. The te
View Question A heating element has a resistance of 100 $$\Omega $$ at room temperature. When it is connected to a supply of 220 V, a
View Question Two identical conducting spheres A and B, carry equal charge. They are separated by a distance much larger than their d
View Question A galvanometer with its coil resistance 25 $$\Omega $$ requires a current of 1 mA for its full deflection. In order to c
View Question A coil of cross-sectional area A having n turns is placed in a uniform magnetic field B. When it is rotated with an angu
View Question A power transmission line feeds input power at 2300 V to a step down transformer with its primary windings having 4000 t
View Question A plane electromagnetic wave of wavelength $$\lambda $$ has an intensity I. It is propagatting along the positive Y-dir
View Question A charge q is spread uniformly over an insulated loop of radius r. If it is rotated with an angular velocity $$\omega $
View Question A ray of light is incident at an angle of 60o on one face of a prism of angle 30o. The emergent ray of light makes an a
View Question Unpolarized light of intensity I is incident on a system of two polarizers, A followed by B. The intensity of emergent
View Question The de-Broglie wavelength ($$\lambda $$B) associated with the electron orbiting in the second excited state of hydrogen
View Question Both the nucleus and the atom of some element arein their respective first excited states. They get de-excted by emittin
View Question At some instant, a radioactive sample S1 having an activity 5 $$\mu $$Ci has twice the number of nuclei as another samp
View Question A carrier wave of peak voltage 14 V is used for transmitting a message signal. The peak voltage of modulating signal giv
View Question The end correction of a resonance column is 1 cm. If the shortest length resonating with the tunning fork is 10 cm, the
View Question In a circuit for finding the resistance of a galvanometer by half deflection method, a 6 V battery and a high resistan
View Question In the given circuit, the current through zener diode is :
View Question One mole of an ideal monoatomic gas is taken along the path ABCA as show in the PV diagram. The maximum temperature atta
View Question In the following circuit, the switch S is closed at t = 0. The charge on the capacitor C1 as a function of time will be
View Question A thin circular disk is in the xy plane as shown in the figure. The ratio of its moment of inertia about z and z' axes w
View Question