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2021 JEE PYQ

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE-MAIN 2021
83 g of ethylene glycol dissolved in 625 g of water.
The freezing point of the solution is _______K.
(Nearest integer) [Use : Molal Freezing...
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Q JEE MAIN 2021
The transformation occurring in Duma's method is given below :
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Q JEE MAIN 2019
Determine the charge on the capacitor in the following circuit :
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Q JEE-MAIN 2021
The overall stability constant of the complex ion $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}$ is $2.1 \times 10^{13}$. The overall dissociations constant is $\mathrm{y} \times 10^{-14}$. Then y is $\_\_\_\_$...
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Q JEE MAIN 2021
The correct structures of A and B formed in the following reactions are
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Q JEE-MAIN 2021
100 mL of $\mathrm{Na}_3 \mathrm{PO}_4$ solution contains 3.45 g of sodium. The molarity of the solution is $\_\_\_\_$ $\times 10^{-2} \mathrm{~mol} \mathrm{~L}^{-1}$. (Nearest integer) [Atomic...
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Q JEE-MAIN 2021
For the galvanic cell
$$ \mathrm{Zn}(\mathrm{~s})+\mathrm{Cu}^{2+}(0.02 \mathrm{M}) \rightarrow \mathrm{Zn}^{2+}(0.04 \mathrm{M})+\mathrm{Cu}(\mathrm{~s}) $$ $\mathrm{E}_{\text {cell }}=$ $\_\_\_\_$ $\times 10^{-2} \mathrm{~V}$. (Nearest integer) $$ \left[\text { Use }:...
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Q JEE MAIN 2021
Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at 803 K ?
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Q JEE MAIN 2021
$$ \text { According to molecular orbital theory, the number of unpaired electron(s) in } \mathrm{O}_2^{2-} \text { is : } $$
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Q JEE MAIN 2021
Sodium oxide reacts with water to produce sodium hydroxide. 20.0 g of sodium oxide is dissolved in 500 mL of water. Neglecting the change in...
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