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2021 JEE PYQ

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE MAIN 2021 S2
Let $f:(\mathrm{a}, \mathrm{b}) \rightarrow \mathrm{R}$ be twice differentiable function such that $\mathrm{f}(\mathrm{x})=\int_{\mathrm{a}}^{\mathrm{x}} \mathrm{g}(\mathrm{t}) \mathrm{dt}$ for a differentiable function $\mathrm{g}(\mathrm{x})$. If $f(x)=0$ has exactly five distinct...
JEE Main Mathematics Medium
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Q JEE MAIN 2021
A source of monochromatic radiation of wavelength 400 nm provides 1000 J of energy in 10 seconds. When this radiation falls on the surface of...
JEE Main Chemistry Easy
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Q JEE MAIN 2021
Two short magnetic dipoles $m_1$ and $m_2$ each having magnetic moment of $1 \mathrm{Am}^2$ are placed at point $O$ and $P$ respectively. The distance between...
JEE Main Physics Easy
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Q JEE MAIN_2021
Let $f:[0, \infty) \rightarrow[0, \infty)$ be defined as $f:(x)=\int_0^x[y] d y$ where $[x]$ is the greatest integer less than or equal to $x$. Which of...
JEE Main Mathematics Easy
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Q JEE MAIN 2021 S2
Let $A$ and $B$ be two $3 \times 3$ real matrices such that $\left(A^2-B^2\right)$ is invertible matrix. If $A^5=B^5$ and $A^3 B^2=A^2 B^3$, then the...
JEE Main Mathematics Medium
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Q JEE MAIN 2021 S2
Let $\vec{a}, \vec{b}$ and $\vec{c}$ be three vectors such that $\vec{a}=\vec{b} \times(\vec{b} \times \vec{c})$. If magnitudes of the vectors $\vec{a}, \vec{b}$ and $\vec{c}$ are $...
JEE Main Mathematics Medium
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Q JEE MAIN 2021
Match List-I with List-II
Choose the correct answer from the options given below :
JEE Main Chemistry Easy
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Q JEE MAIN 2021
Three moles of AgCl get precipitated when one mole of an octahedral co-ordination compound with empirical formula $\mathrm{CrCl}_3 .3 \mathrm{NH}_3 .3 \mathrm{H}_2 \mathrm{O}$ reacts with...
JEE Main Chemistry Easy
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Q JEE MAIN 2021
An amplitude modulated wave is represented by $$ C_m(t)=10(1+0.2 \cos 12560 t) \sin \left(111 \times 10^4 t\right) \text { volts. } $$ The modulating frequency...
JEE Main Physics Easy
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Q JEE MAIN 2021
Potassium chlorate is prepared by electrolysis of KCl in basic solution as shown by following equation. $ 6 \mathrm{OH}^{-}+\mathrm{Cl}^{-} \rightarrow \mathrm{ClO}_3^{-}+3 \mathrm{H}_2 \mathrm{O}+6 \mathrm{e}^{-} $...
JEE Main Chemistry Hard
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