JEE Main 2020 (Online) 7th January Morning Slot
Paper was held on Tue, Jan 7, 2020 3:30 AM
View Questions

Chemistry

The atomic radius of Ag is closed to :
View Question
The theory that can completely/properly explain the nature of bonding in [Ni(Co)4] is :
View Question
Oxidation number of potassium in K2O. K2O2 and KO2 respectively is :
View Question
Amongst the following statements, that which was not proposed by Dalton was :
View Question
At 35oC, the vapour pressure of CS2 is 512 mm. Hg and that of acetone is 344 mm Hg. A solution of CS2 in acetone has a
View Question
The increasing order to Pkb for the following compounds will be :
View Question
A solution of m-chloronailimne, m-chlorophenol and m-chlorobenzoic acid in ethyal acetate was extracted initially with a
View Question
The electron gain enthalpy (in KJ/mol) of fluorine, chlorine, bromine and iodine, respectively are:
View Question
1- methyl ethylene oxide when treated with an excess of HBr produces :
View Question
The IUPAC name of complex [Pt(NH3)2Cl(NH2CH3)]Cl is:
View Question
The relative strength of interionic/intermolecular forces in decreasing order is :
View Question
Match the following : (i) Riboflavin    (a) Beriberi (ii) Thiamine    (b) Scurvy (iii) Pyr
View Question
The purest from of commercial iron is :
View Question
In comparison to the zeolite process for the removal of permanent hardness, the synthetic resins method is :
View Question
The dipole of CCl4, CHCl3 and CH4 are in the order :
View Question
Consider the following reaction : $${\left( {C{H_3}} \right)_3}CCH\left( {OH} \right)C{H_3}\buildrel {conc.\,\,\,{H_2}S{
View Question
Given that the standard potentials (Eo) of Cu2+/Cu and Cu+/Cu are 0.34 V and 0.522 V respectively, the Eo of Cu2+/Cu+ :
View Question
Consider the following reaction : The product 'X' is used :
View Question
What is the product of following reaction ?
View Question
The number of orbitals associated with quantum number n = 5, ms = +$${1 \over 2}$$ is :
View Question
The number of chiral carbons in chloramphenicol is
View Question
Two solutions, A and B, each of 100L was made by dissolving 4g of NaOH and 9.8 g of H2SO4 in water, respectively. The pH
View Question
During the nuclear explosion, one of the products is 90Sr with half life of 6.93 years. If 1 $$\mu $$ g of 90Sr was abso
View Question
For the reaction : A($$l$$) $$ \to $$ 2B(g) $$\Delta U = 2.1\,kcal,\,\Delta S = 20\,cal\,{K^{ - 1}}$$ at 300 K Hence $$\
View Question
Chlorine reacts with hot and concentrated NaOH and produces compounds (X) and (Y). Compound (X) gives white precipitate
View Question

Mathematics

Let xk + yk = ak, (a, k > 0 ) and $${{dy} \over {dx}} + {\left( {{y \over x}} \right)^{{1 \over 3}}} = 0$$, then k is
View Question
Let $$\alpha $$ be a root of the equation x2 + x + 1 = 0 and the matrix A = $${1 \over {\sqrt 3 }}\left[ {\matrix{ 1
View Question
A vector $$\overrightarrow a = \alpha \widehat i + 2\widehat j + \beta \widehat k\left( {\alpha ,\beta \in R} \right)$
View Question
Let $$\alpha $$ and $$\beta $$ be two real roots of the equation (k + 1)tan2x - $$\sqrt 2 $$ . $$\lambda $$tanx = (1 - k
View Question
If $${\mathop{\rm Re}\nolimits} \left( {{{z - 1} \over {2z + i}}} \right) = 1$$, where z = x + iy, then the point (x, y)
View Question
Total number of 6-digit numbers in which only and all the five digits 1, 3, 5, 7 and 9 appear, is :
View Question
If y = mx + 4 is a tangent to both the parabolas, y2 = 4x and x2 = 2by, then b is equal to :
View Question
If the distance between the foci of an ellipse is 6 and the distance between its directrices is 12, then the length of i
View Question
The area of the region, enclosed by the circle x2 + y2 = 2 which is not common to the region bounded by the parabola y2
View Question
Let the function, ƒ:[-7, 0]$$ \to $$R be continuous on [-7,0] and differentiable on (-7, 0). If ƒ(-7) = - 3 and ƒ'(x) $$
View Question
An unbiased coin is tossed 5 times. Suppose that a variable X is assigned the value of k when k consecutive heads are ob
View Question
The greatest positive integer k, for which 49k + 1 is a factor of the sum 49125 + 49124 + ..... + 492 + 49 + 1, is:
View Question
Let P be a plane passing through the points (2, 1, 0), (4, 1, 1) and (5, 0, 1) and R be any point (2, 1, 6). Then the im
View Question
If ƒ(a + b + 1 - x) = ƒ(x), for all x, where a and b are fixed positive real numbers, then $${1 \over {a + b}}\int_a^b {
View Question
If g(x) = x2 + x - 1 and (goƒ) (x) = 4x2 - 10x + 5, then ƒ$$\left( {{5 \over 4}} \right)$$ is equal to:
View Question
If the system of linear equations 2x + 2ay + az = 0 2x + 3by + bz = 0 2x + 4cy + cz = 0, where a, b, c $$ \in $$ R are n
View Question
If $$y\left( \alpha \right) = \sqrt {2\left( {{{\tan \alpha + \cot \alpha } \over {1 + {{\tan }^2}\alpha }}} \right) +
View Question
If y = y(x) is the solution of the differential equation, $${e^y}\left( {{{dy} \over {dx}} - 1} \right) = {e^x}$$ such t
View Question
The logical statement (p $$ \Rightarrow $$ q) $$\Lambda $$ ( q $$ \Rightarrow $$ ~p) is equivalent to :
View Question
Five numbers are in A.P. whose sum is 25 and product is 2520. If one of these five numbers is -$${1 \over 2}$$ , then th
View Question
If the sum of the coefficients of all even powers of x in the product (1 + x + x2 + ....+ x2n)(1 - x + x2 - x3 + ......
View Question
Let S be the set of points where the function, ƒ(x) = |2-|x-3||, x $$ \in $$ R is not differentiable. Then $$\sum\limits
View Question
Let A(1, 0), B(6, 2) and C $$\left( {{3 \over 2},6} \right)$$ be the vertices of a triangle ABC. If P is a Point inside
View Question
If the variance of the first n natural numbers is 10 and the variance of the first m even natural numbers is 16, then m
View Question
$$\mathop {\lim }\limits_{x \to 2} {{{3^x} + {3^{3 - x}} - 12} \over {{3^{ - x/2}} - {3^{1 - x}}}}$$ is equal to_______
View Question

Physics

A 60 HP electric motor lifts an elevator having a maximum total load capacity of 2000 kg. If the frictional force on the
View Question
Consider a circular coil of wire carrying constant current I, forming a magnetic dipole. The magnetic flux through an in
View Question
A polarizer - analyser set is adjusted such that the intensity of light coming out of the analyser is just 10% of the or
View Question
The radius of gyration of a uniform rod of length $$l$$, about an axis passing through a point $${l \over 4}$$ away from
View Question
A long solenoid of radius R carries a time (t) - dependent current I(t)=I0t(1 - t). A ring of radius 2R is placed coaxia
View Question
Two infinite planes each with uniform surface charge density to are kept in such a way that the angle between them is 30
View Question
Speed of a transverse wave on a straight wire (mass 6.0 g, length 60 cm and area of cross-section 1.0 mm2) is 90 ms-1. I
View Question
Two moles of an ideal gas with $${{{C_P}} \over {{C_V}}} = {5 \over 3}$$ are mixed with 3 moles of another ideal gas wit
View Question
The time period of revolution of electron in its ground state orbit in a hydrogen atom is 1.6 $$ \times $$ 10-16 s. The
View Question
A satellite of mass m is launched vertically upwards with an initial speed u from the surface of the earth. After it rea
View Question
As shown in the figure, a bob of mass m is tied by a massless string whose other end portion is wound on a fly wheel (d
View Question
Which of the following gives a reversible operation?
View Question
If we need a magnification of 375 from a compound microscope of tube length 150 mm and an objective of focal length 5 mm
View Question
The current I1 (in A) flowing through 1 $$\Omega $$ resistor in the following circuit is :
View Question
A particle (m = 1 kg) slides down a frictionless track (AOC) starting from rest at a point A (height 2 m). After reachin
View Question
A Carnot engine operates between two reservoirs of temperatures 900 K and 300 K. The engine performs 1200 J of work per
View Question
If the magnetic field in a plane electromagnetic wave is given by $$\overrightarrow B $$ = 3 $$ \times $$ 10-8 sin(1.6 $
View Question
Visible light of wavelength 6000 $$ \times $$ 10-8 cm falls normally on a single slit and produces a diffraction pattern
View Question
A beam of electromagnetic radiation of intensity 6.4 × 10–5 W/cm2 is comprised of wavelength, $$\lambda $$ = 310 nm. It
View Question
A litre of dry air at STP expands adiabatically to a volume of 3 litres. If $$\gamma $$ = 1.40, the work done by air is
View Question
A non-isotropic solid metal cube has coefficients of linear expansion as : 5 $$ \times $$ 10-5/oC along the x-axis and 5
View Question
Three point particles of masses 1.0 kg, 1.5 kg and 2.5 kg are placed at three corners of a right angle triangle of sides
View Question
A LCR circuit behaves like a damped harmonic oscillator. Comparing it with a physical spring-mass damped oscillator havi
View Question
A parallel plate capacitor has plates of area A separated by distance 'd' between them. It is filled with a dielectric
View Question
A loop ABCDEFA of straight edges has six corner points A(0, 0, 0), B(5, 0, 0), C(5, 5, 0), D (0, 5, 0), E(0, 5, 5) and F
View Question
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12