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2021 JEE PYQ

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE MAIN 2021
If the arithmetic mean and geometric mean of the $p^{\text {th }}$ and $q^{\text {th }}$ terms of the sequence $-16,8,-4,2, \ldots$ satisfy the equation...
JEE Main Mathematics Hard
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Q JEE MAIN 2021
Two vectors $\vec{X}$ and $\vec{Y}$ have equal magnitude. The magnitude of $(\vec{X}-\vec{Y})$ is $n$ times the magnitude of $(\vec{X}+\vec{Y})$. The angle between $\vec{X}$ and $\vec{Y}$...
JEE Main Physics Easy
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Q JEE MAIN 2021
The oxidation states of ' $\mathrm{P}^{\prime}$ in $\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_7, \mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_5$ and $\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_6$, respectively, are :
JEE Main Chemistry Easy
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Q JEE-MAIN 2021
The half life period of radioactive element x is same as the mean life time of another radioactive element y. Initially they have the same...
JEE Main Physics Easy
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Q JEE MAIN 2021
A 100 $\Omega$ resistance, a 0.1 $\mu \mathrm{F}$ capacitor and an inductor are connected in series across a 250 V supply at variable frequency. Calculate...
JEE Main Physics Easy
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Q JEE MAIN 2021
The parameters of the unit cell of a substance are $a=2.5, b=3.0, c=4.0, \alpha=90^{\circ}, \beta=120^{\circ} \gamma=90^{\circ}$.
The crystal system of the substance is i.
JEE Main Chemistry Easy
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Q JEE MAIN 2021
When radiation of wavelength $\lambda$ is incident on a metallic surface, the stopping potential of ejected photoelectrons is 4.8 V . If the same surface...
JEE Main Physics Medium
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Q JEE-MAIN 2021
Two resistors $\mathrm{R}_1=(4 \pm 0.8) \Omega$ and $\mathrm{R}_2=(4 \pm 0.4) \Omega$ are connected in parallel. The equivalent resistance of their parallel combination will be :
JEE Main Physics Easy
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Q JEE MAIN 2021
A ray of light entering from air into a denser medium of refractive index $\frac{4}{3}$, as shown in figure. The light ray suffers total internal...
JEE Main Physics Medium
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Q JEE MAIN 2021
Given below is the plot of a potential energy function U (x) for a system, in which a particle is in one dimensional motion, while...
JEE Main Physics Easy
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