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JEE Main 2021 (Online) 22th July Evening Shift

Exam Held on Thu Jul 22 2021 09:30:00 GMT+0000 (Coordinated Universal Time)
Click View All Questions to see questions one by one or you can choose a single question from below.

Chemistry

The water having more dissolved O<sub>2</sub> is :
Which one of the following statements for D.I. Mendeleeff, is incorrect?
Which purification technique is used for high boiling organic liquid compound (d...
Which of the following compounds will provide a tertiary alcohol or reaction wit...
Which of the following compounds does not exhibit resonance?
Match List-I with List-II<br><br><table> <thead> <tr> <th></th> <th>Li...
<picture><source media="(max-width: 320px)" srcset="https://imagex.cdn.examgoal....
Isotope(s) of hydrogen which emits low energy $$\beta$$<sup>$$-$$</sup> particle...
Match List-I with List-II :<br><br><table> <thead> <tr> <th></th> <th>...
When silver nitrate solution is added to potassium iodide solution then the sol ...
Which of the following molecules does not show stereo isomerism?
Given below are the statements about diborane<br><br>(a) Diborane is prepared by...
Which one of the following group-15 hydride is the strongest reducing agent?
Match List-I with List-II :<br><br><img src="https://imagex.cdn.examgoal.net/1kr...
The set having ions which are coloured and paramagnetic both is -
Thiamine and pyridoxine are also known respectively as :
Sulphide ion is soft base and its ores are common for metals.<br><br>(a) Pb (b) ...
An organic compound A (C<sub>6</sub>H<sub>6</sub>O) gives dark green colouration...
Which one of the following reactions does not occur?
Which one of the following 0.06 M aqueous solutions has lowest freezing point?
The total number of unpaired electrons present in [Co(NH<sub>3</sub>)<sub>6</sub...
Methylation of 10 g of benzene gave 9.2 g of toluene. Calculate the percentage y...
The number of acyclic structural isomers (including geometrical isomers) for pen...
Assume a cell with the following reaction<br><br>$$C{u_{(s)}} + 2A{g^ + }(1 \tim...
Value of K<sub>P</sub> for the equilibrium reaction<br><br>N<sub>2</sub>O<sub>4(...
If the standard molar enthalpy change for combustion of graphite powder is $$-$$...
A copper complex crystallising in a CCP lattice with a cell edge of 0.4518 nm ha...
Number of electrons that Vanadium (Z = 23) has in p-orbitals is equal to _______...
$${N_2}{O_{5(g)}} \to 2N{O_{2(g)}} + {1 \over 2}{O_{2(g)}}$$<br><br>In the above...
If the concentration of glucose (C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>) in bl...

Mathematics

Let L be the line of intersection of planes $$\overrightarrow r .(\widehat i - \...
Let S<sub>n</sub> denote the sum of first n-terms of an arithmetic progression. ...
Let f : R $$\to$$ R be defined as<br><br>$$f(x) = \left\{ {\matrix{ { - {4 \o...
Let y = y(x) be the solution of the differential equation $$\cos e{c^2}xdy + 2dx...
Four dice are thrown simultaneously and the numbers shown on these dice are reco...
Let a vector $${\overrightarrow a }$$ be coplanar with vectors $$\overrightarrow...
If $$\int\limits_0^{100\pi } {{{{{\sin }^2}x} \over {{e^{\left( {{x \over \pi } ...
Let three vectors $$\overrightarrow a $$, $$\overrightarrow b $$ and $$\overrigh...
The values of $$\lambda$$ and $$\mu$$ such that the system of equations $$x + y ...
If the shortest distance between the straight lines $$3(x - 1) = 6(y - 2) = 2(z ...
Which of the following Boolean expressions is not a tautology?
Let A = [a<sub>ij</sub>] be a real matrix of order 3 $$\times$$ 3, such that a<s...
Let [x] denote the greatest integer less than or equal to x. Then, the values of...
Let the circle S : 36x<sup>2</sup> + 36y<sup>2</sup> $$-$$ 108x + 120y + C = 0 b...
Let n denote the number of solutions of the equation z<sup>2</sup> + 3$$\overlin...
The number of solutions of sin<sup>7</sup>x + cos<sup>7</sup>x = 1, x$$\in$$ [0,...
If the domain of the function $$f(x) = {{{{\cos }^{ - 1}}\sqrt {{x^2} - x + 1} }...
Let f : R $$\to$$ R be defined as $$f(x) = \left\{ {\matrix{ {{{{x^3}} \over ...
Let a line L : 2x + y = k, k &gt; 0 be a tangent to the hyperbola x<sup>2</sup> ...
Let $${E_1}:{{{x^2}} \over {{a^2}}} + {{{y^2}} \over {{b^2}}} = 1,a &gt; b$$. Le...
Let A = {0, 1, 2, 3, 4, 5, 6, 7}. Then the number of bijective functions f : A $...
If the digits are not allowed to repeat in any number formed by using the digits...
Let $$A = \left[ {\matrix{ 0 &amp; 1 &amp; 0 \cr 1 &amp; 0 &amp; 0 \cr ...
Consider the following frequency distribution :<br><br><table> <thead> <tr> ...
The sum of all the elements in the set {n$$\in$$ {1, 2, ....., 100} | H.C.F. of ...
The area (in sq. units) of the region bounded by the curves x<sup>2</sup> + 2y $...
Let f : R $$\to$$ R be a function defined as $$f(x) = \left\{ {\matrix{ {3\le...
If the constant term, in binomial expansion of $${\left( {2{x^r} + {1 \over {{x^...
Let y = y(x) be the solution of the differential equation $$\left( {(x + 2){e^{\...
The number of elements in the set {n $$\in$$ {1, 2, 3, ......., 100} | (11)<sup>...

Physics

Choose the correct option
What will be the projection of vector $$\overrightarrow A = \widehat i + \wideh...
A Copper (Cu) rod of length 25 cm and cross-sectional area 3 mm<sup>2</sup> is j...
In a circuit consisting of a capacitance and a generator with alternating emf E<...
A porter lifts a heavy suitcase of mass 80 kg and at the destination lowers it d...
Consider a situation in which a ring, a solid cylinder and a solid sphere roll d...
Intensity of sunlight is observed as 0.092 Wm<sup>$$-$$2</sup> at a point in fre...
A body is projected vertically upwards from the surface of earth with a velocity...
An electric dipole is placed on x-axis in proximity to a line charge of linear c...
A nucleus with mass number 184 initially at rest emits an $$\alpha$$-particle. I...
A bullet of '4 g' mass is fired from a gun of mass 4 kg. If the bullet moves wit...
Statement I : The ferromagnetic property depends on temperature. At high tempera...
Match List - I with List - II<br><br><table> <thead> <tr> <th></th> <t...
A ray of light passes from a denser medium to a rarer medium at an angle of inci...
An electron of mass m<sub>e</sub> and a proton of mass m<sub>p</sub> are acceler...
What will be the average value of energy for a monoatomic gas in thermal equilib...
T<sub>0</sub> is the time period of a simple pendulum at a place. if the length ...
What should be the height of transmitting antenna and the population covered if ...
The motion of a mass on a spring, with spring constant K is as shown in figure.<...
Consider a situation in which reserve biased current of a particular P-N junctio...
A ray of light passing through a prism ($$\mu$$ = $$\sqrt 3 $$) suffers minimum ...
Three students S<sub>1</sub>, S<sub>2</sub> and S<sub>3</sub> perform an experim...
Three particles P, Q and R are moving along the vectors $$\overrightarrow A = \...
In 5 minutes, a body cools from 75$$^\circ$$C to 65$$^\circ$$C at room temperatu...
In a given circuit diagram, a 5 V zener diode along with a series resistance is ...
The total charge enclosed in an incremental volume of 2 $$\times$$ 10<sup>$$-$$9...
The position of the centre of mass of a uniform semi-circular wire of radius 'R'...
In an electric circuit, a cell of certain emf provides a potential difference of...
The area of cross-section of a railway track is 0.01 m<sup>2</sup>. The temperat...
The centre of a wheel rolling on a plane surface moves with a speed v<sub>0</sub...

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