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2020 JEE PYQ

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE MAIN 2020
A vector $\vec{a}=\alpha \hat{i}+2 \hat{j}+\beta \hat{k}(\alpha, \beta \in R)$ lies in the plane of the vectors, $\vec{b}=\hat{i}+\hat{j}$ and $\vec{c}=\hat{i}-\hat{j}+4 \hat{k}$. If $\vec{a}$ bisects the angle...
JEE Main Mathematics Hard
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Q JEE-MAIN 2020
A uniform rod of length ' $l$ ' is pivoted at one of its ends on a vertical shaft of negligible radius. When the shaft...
JEE Main Physics Easy
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Q JEE MAIN 2020
The correct order of the calculated spin-only magnetic moments of complexes (A) to (D) is
(A) $\mathrm{Ni}(\mathrm{CO})_4$ (B) $\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_2$
(C) $\mathrm{Na}_2\left[\mathrm{Ni}(\mathrm{CN})_4\right]$...
JEE Main Chemistry Medium
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Q JEE MAIN 2020
Let $\alpha$ and $\beta$ be two real roots of the equation $(\mathrm{k}+1) \tan ^2 \mathrm{x}-\sqrt{2} \cdot \lambda \tan \mathrm{x}=(1-\mathrm{k})$, where $\mathrm{k}(\neq-1)$ and $\lambda$ are real...
JEE Main Mathematics Medium
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Q JEE-MAIN 2020
If a semiconductor photodiode can detect a photon with a maximum wavelength of 400 nm, then its band gap energy is
Planck's constant $...
JEE Main Physics Easy
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Q JEE MAIN 2020
The radius of the second Bohr orbit, in terms of the Bohr radius, $\mathbf{a}_0$, in $\mathrm{Li}^{2+}$ is
JEE Main Chemistry Easy
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Q JEE MAIN 2020
Let $x^k+y^k=a^k,(a, k>0)$ and $\frac{d y}{d x}+\left(\frac{y}{x}\right)^{\frac{1}{3}}=0$, then k is :
JEE Main Mathematics Easy
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Q JEE MAIN 2020
A small ball of mass $m$ is thrown upward with velocity $u$ from the ground. The ball experiences a resistive force $m k v^2$, where...
JEE Main Physics Easy
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Q JEE MAIN 2020
A rod of length $L$ has non-uniform linear mass density given by $$ \rho(\mathrm{x})=\mathrm{a}+\mathrm{b}\left(\frac{\mathrm{x}}{\mathrm{~L}}\right)^2 $$ , where a and b are constants and $...
JEE Main Physics Easy
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Q JEE MAIN 2020
If $g(x)=x^2+x-1$ and $(g \circ f)(x)=4 x^2-10 x+5$, then $\mathrm{f}\left(\frac{5}{4}\right)$ is equal to:
JEE Main Mathematics Easy
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