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JEE Main 2021 (Online) 26th February Evening Shift

Exam Held on Fri Feb 26 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

Match List - I with List - II.<br><br><table> <thead> <tr> <th></th> <...
Ceric ammonium nitrate and CHCl<sub>3</sub>/alc. KOH are used for the identifica...
In $$\mathop C\limits^1 {H_2} = \mathop C\limits^2 = \mathop C\limits^3 H - \ma...
A. Phenyl methanamine<br><br>B. N,N-Dimethylaniline<br><br>C. N-Methyl aniline<b...
Match List - I with List - II.<br><br><table> <thead> <tr> <th></th> <...
Given below are two statements : one is labelled as Assertion A and the other is...
Which of the following forms of hydrogen emits low energy $$\beta$$<sup>-</sup> ...
Which pair of oxides is acidic in nature?
Identify A in the given reaction.<br><br><img src="https://imagex.cdn.examgoal.n...
Match List - I with List - II.<br><br><img src="https://imagex.cdn.examgoal.net/...
Identify A in the following chemical reaction.<br><br><img src="https://imagex.c...
2, 4-DNP test can be used to identify :
<img src="https://imagex.cdn.examgoal.net/1klux0uzp/936737bd-6c7b-4fd6-8890-75ae...
Identify A in the given chemical reaction.<br><br><img src="https://imagex.cdn.e...
Match List - I with List - II.<br><br><table> <thead> <tr> <th></th> <...
The correct order of electron gain enthalpy is :
The nature of charge on resulting colloidal particles when FeCl<sub>3</sub> is a...
Match List - I with List - II.<br><br><table style="width:100%"> <thead> <tr> ...
Calgon is used for water treatment. Which of the following statement is NOT true...
Seliwanoff test and Xanthoproteic test are used for the identification of ______...
When 12.2 g of benzoic acid is dissolved in 100 g of water, the freezing point o...
If the activation energy of a reaction is 80.9 kJ mol<sup>$$-$$1</sup>, the frac...
The number of octahedral voids per lattice site in a lattice is _________. (Roun...
In mildly alkaline medium, thiosulphate ion is oxidized by $$MnO_4^ - $$ to "A"....
The average S-F bond energy in kJ mol<sup>$$-$$1</sup> of SF<sub>6</sub> is ____...
Emf of the following cell at 298K in V is x $$\times$$ 10<sup>$$-$$2</sup>.<br><...
The pH of ammonium phosphate solution, if pk<sub>a</sub> of phosphoric acid and ...
The number of stereoisomers possible for [Co(ox)<sub>2</sub>(Br)(NH<sub>3</sub>)...
A ball weighing 10 g is moving with a velocity of 90 ms<sup>$$-$$1</sup>. If the...
The NaNO<sub>3</sub> weighed out to make 50 mL of an aqueous solution containing...

Mathematics

Let f(x) be a differentiable function at x = a with f'(a) = 2 and f(a) = 4. <br>...
Let A(1, 4) and B(1, $$-$$5) be two points. Let P be a point on the circle <br>(...
Let F<sub>1</sub>(A, B, C) = (A $$ \wedge $$ $$ \sim $$ B) $$ \vee $$ [$$\sim$$C...
Consider the following system of equations :<br><br>x + 2y $$-$$ 3z = a<br><br>2...
A natural number has prime factorization given by n = 2<sup>x</sup>3<sup>y</sup>...
If 0 &lt; a, b &lt; 1, and tan<sup>$$-$$1</sup>a + tan<sup>$$-$$1</sup>b = $${\p...
Let $$f(x) = \int\limits_0^x {{e^t}f(t)dt + {e^x}} $$ be a differentiable functi...
For x &gt; 0, if $$f(x) = \int\limits_1^x {{{{{\log }_e}t} \over {(1 + t)}}dt} $...
If the mirror image of the point (1, 3, 5) with respect to the plane <br><br>4x ...
Let $$A = \{ 1,2,3,....,10\} $$ and $$f:A \to A$$ be defined as<br><br>$$f(k) = ...
Let A<sub>1</sub> be the area of the region bounded by the curves y = sinx, y = ...
Let $$f(x) = {\sin ^{ - 1}}x$$ and $$g(x) = {{{x^2} - x - 2} \over {2{x^2} - x -...
Let slope of the tangent line to a curve at any point P(x, y) be given by $${{x{...
Let f : R $$ \to $$ R be defined as <br><br>$$f(x) = \left\{ \matrix{ 2\sin \l...
The triangle of maximum area that can be inscribed in a given circle of radius '...
If the locus of the mid-point of the line segment from the point (3, 2) to a poi...
The sum of the series <br><br>$$\sum\limits_{n = 1}^\infty {{{{n^2} + 6n + 10} ...
If vectors $$\overrightarrow {{a_1}} = x\widehat i - \widehat j + \widehat k$$ ...
A seven digit number is formed using digits 3, 3, 4, 4, 4, 5, 5. The probability...
Let L be a line obtained from the intersection of two planes x + 2y + z = 6 and ...
The total number of 4-digit numbers whose greatest common divisor with 18 is 3, ...
If the matrix $$A = \left[ {\matrix{ 1 &amp; 0 &amp; 0 \cr 0 &amp; 2 &am...
Let $$\alpha$$ and $$\beta$$ be two real numbers such that $$\alpha$$ + $$\beta$...
Let z be those complex numbers which satisfy<br><br>| z + 5 | $$ \le $$ 4 and z(...
Let the normals at all the points on a given curve pass through a fixed point (a...
If the arithmetic mean and geometric mean of the p<sup>th</sup> and q<sup>th</su...
If $${I_{m,n}} = \int\limits_0^1 {{x^{m - 1}}{{(1 - x)}^{n - 1}}dx} $$, for m, $...
Let X<sub>1</sub>, X<sub>2</sub>, ......., X<sub>18</sub> be eighteen observatio...
Let a be an integer such that all the real roots of the polynomial <br>2x<sup>5<...
Let L be a common tangent line to the curves <br><br>4x<sup>2</sup> + 9y<sup>2</...

Physics

Draw the output signal Y in the given combination of gates.<br><br><img src="htt...
An aeroplane, with its wings spread 10 m, is flying at a speed of 180 km/h in a ...
Find the peak current and resonant frequency of the following circuit (as shown ...
A scooter accelerates from rest for time t<sub>1</sub> at constant rate a<sub>1<...
A radioactive sample is undergoing $$\alpha$$ decay. At any time t<sub>1</sub>, ...
Given below are two statements: <br><br>Statement I : An electric dipole is plac...
If 'C' and 'V' represent capacity and voltage respectively then what are the dim...
The recoil speed of a hydrogen atom after it emits a photon in going from n = 5 ...
A wire of 1$$\Omega$$ has a length of 1 m. It is stretched till its length incre...
The incident ray, reflected ray and the outward drawn normal are denoted by the ...
The internal energy (U), pressure (P) and volume (V) of an ideal gas are related...
The length of metallic wire is l<sub>1</sub> when tension in it is T<sub>1</sub>...
The trajectory of a projectile in a vertical plane is y = $$\alpha$$x $$-$$ $$\b...
Given below are two statements : one is labeled as Assertion A and the other is ...
An inclined plane making an angle of 30$$^\circ$$ with the horizontal is placed ...
Two masses A and B, each of mass M are fixed together by a massless spring. A fo...
A cord is wound round the circumference of wheel of radius r. The axis of the wh...
A particle executes S.H.M., the graph of velocity as a function of displacement ...
A tuning fork A of unknown frequency produces 5 beats/s with a fork of known fre...
Given below are two statements :<br><br>Statement I : A second's pendulum has a ...
1 mole of rigid diatomic gas performs a work of $${Q \over 5}$$ when heat Q is s...
A particle executes S.H.M. with amplitude 'a', and time period 'T'. The displace...
Time period of a simple pendulum is T. The time taken to complete $${5 \over 8}$...
The zener diode has a V<sub>z</sub> = 30V. The current passing through the diode...
The volume V of a given mass of monoatomic gas changes with temperature T accord...
27 similar drops of mercury are maintained at 10V each. All these spherical drop...
A point source of light S, placed at a distance 60cm in front of the centre of ...
In the reported figure of earth, the value of acceleration due to gravity is sam...
Two stream of photons, possessing energies equal to twice and ten times the work...
If the highest frequency modulating a carrier is 5 kHz, then the number of AM br...

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