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2021 JEE PYQ

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE MAIN 2021
For a first order reaction, the ratio of the time for 75% completion of a reaction to the time for 50% completion is _______. (Integer...
JEE Main Chemistry Easy
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Q JEE MAIN 2021
For an ideal gas the instantaneous change in pressure ' $p$ ' with volume ' $v$ ' is given by the equation $...
JEE Main Physics Hard
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Q JEE MAIN 2021
The point $\mathrm{P}(-2 \sqrt{6}, \sqrt{3})$ lies on the hyperbola $\frac{\mathrm{x}^2}{\mathrm{a}^2}-\frac{\mathrm{y}^2}{\mathrm{~b}^2}=1$ having eccentricity $\frac{\sqrt{5}}{2}$. If the tangent and normal at $P$ to the hyperbola intersect its...
JEE Main Mathematics Medium
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Q JEE MAIN 2021
Q.15 Given below are two statements : Statement I : The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves proton...
JEE Main Chemistry Easy
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Q JEE MAIN 2021
If velocity [V], time [T] and force [F] are chosen as the base quantities, the dimensions of the mass will be :
JEE Main Physics Easy
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Q JEE MAIN 2021
The total number of reagents from those given below, that can convert nitrobenzene into aniline is ______. (Integer answer)
JEE Main Chemistry Easy
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Q JEE MAIN 2021
Consider the sulphides $\mathrm{HgS}, \mathrm{PbS}, \mathrm{CuS}, \mathrm{Sb} 2 \mathrm{~S}_3, \mathrm{As}_2 \mathrm{~S}_3$ and CdS . Number of these sulphides soluble in $50 \% \mathrm{HNO}_3$ is $\_\_\_\_$...
JEE Main Chemistry Medium
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Q JEE MAIN 2021
In the following sequence of reactions,
JEE Main Chemistry Medium
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Q JEE-MAIN 2021
The Crystal Field Stabilization Energy (CFSE) and magnetic moment (spin-only) of an octahedral aqua complex of a metal ion ( $\mathrm{M}^{z^{+}}$) are $-0.8 \Delta_0$ and...
JEE Main Chemistry Easy
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Q JEE MAIN 2021
The molarity of the solution prepared by dissolving 6.3 g of oxalic acid $\left(\mathrm{H}_2 \mathrm{C}_2 \mathrm{O}_4 .2 \mathrm{H}_2 \mathrm{O}\right)$ in 250 mL of water in...
JEE Main Chemistry Easy
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