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2019 JEE PYQ

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE MAIN 2019
When the first electron gain enthalpy $\left(\Delta_{e 0} \mathrm{H}\right)$ of oxygen is $-141 \mathrm{~kJ} / \mathrm{mol}$, its second electron gain enthalpy is
JEE Main Chemistry Easy
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Q JEE MAIN 2019
There are m men and two women participating in a chess tournament. Each participant plays two games with every other participant. If the number of...
JEE Main Mathematics Medium
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Q JEE MAIN 2019
In which of the following processes, the bond order has increased and paramagnetic character has changed to diamagnetic?
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Q JEE MAIN 2019
If the function f given by $\mathrm{f}(\mathrm{x})=\mathrm{x}^3-3(\mathrm{a}-2) \mathrm{x}^2+3 \mathrm{ax}+7$, for some $\mathrm{a} \in \mathrm{R}$ is increasing in $(0,1]$ and decreasing in $[1,5)$, then a root...
JEE Main Mathematics Medium
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Q JEE MAIN 2019
For coagulation of arsenious sulphide sol, which one of the following salt solution will be most effective?
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Q JEE-MAIN 2019
The hardness of a water sample (in terms of equivalents of $\mathrm{CaCO}_3$ ) containing $10^{-3} \mathrm{M} \mathrm{CaSO}_4$ is (molar mass of $\mathrm{CaSO}_4=136 \mathrm{~g} \mathrm{~mol}^{-1}$ )
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Q JEE MAIN 2019
If the standard electrode potential for a cell is 2 V at 300 K , the equilibrium constant $(\mathrm{K})$ for the reaction
$...
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Q JEE MAIN 2019
Let $f$ be a differentiable function such that $f(1)=2$ and $f^{\prime}(x)=f(x)$ for all $x \in R$. If $h(x)=f(f(x))$, then $h^{\prime}(1)$ is equal to
JEE Main Mathematics Medium
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Q JEE-MAIN 2019
A metal on combustion in excess air forms $X$. $X$ upon hydrolysis with water yields $\mathrm{H}_2 \mathrm{O}_2$ and $\mathrm{O}_2$ along with another product. The metal...
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Q JEE-MAIN 2019
The metal d-orbitals that are directly facing the ligands in $\mathrm{K}_3\left[\mathrm{Co}(\mathrm{CN})_6\right]$ are
JEE Main Chemistry Easy
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