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2021 JEE PYQ

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE MAIN 2021
The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is equal to $\frac{h^2}{x m a_0^2}$. The value of $...
JEE Main Chemistry Easy
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Q JEE MAIN 2021
If the conductivity of mercury at $0^{\circ} \mathrm{C}$ is $1.07 \times 10^6 \mathrm{~S} \mathrm{~m}^{-1}$ and the resistance of a cell containing mercury is $0.243 \Omega$,...
JEE Main Chemistry Easy
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Q JEE-MAIN 2021
The sol given below with negatively charged colloidal particles is :
JEE Main Chemistry Easy
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Q JEE MAIN 2021
A particle is moving with constant acceleration ' $a$ '. Following graph shows $v^2$ versus $x$ (displacement) plot. The acceleration of the particle is $\_\_\_\_$...
JEE Main Physics Medium
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Q JEE MAIN_2021_
When 400 mL of $0.2 \mathrm{M} \mathrm{H}_2 \mathrm{SO}_4$ solution is mixed with 600 mL of 0.1 M NaOH solution, the increase in temperature of the...
JEE Main Chemistry Easy
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Q JEE MAIN 2021
The reaction that occurs in a breath analyser, a device used to determine the alcohol level in a person's blood stream is
$...
JEE Main Chemistry Easy
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Q JEE MAIN 2021
The electric field in an electromagnetic wave is given by $\mathrm{E}=\left(50 \mathrm{NC}^{-1}\right) \sin \omega(\mathrm{t}-\mathrm{x} / \mathrm{c})$ The energy contained in a cylinder of volume V...
JEE Main Physics Medium
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Q JEE MAIN 2021
$\lim _{x \rightarrow 2}\left(\sum_{n=1}^9 \frac{x}{n(n+1) x^2+2(2 n+1) x+4}\right)$ is equal to :
JEE Main Mathematics Easy
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Q JEE-MAIN 2021
Indicate the complex/complex ion which did not show any geometrical isomerism :
JEE Main Chemistry Easy
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Q JEE MAIN 2021
In Carius method for estimation of halogens, 0.2 g of an organic compound gave 0.188 g of AgBr . The percentage of bromine in the...
JEE Main Chemistry Medium
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