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QJEE MAIN_2023
Substance A has atomic mass number 16 and half life of 1 day. Another substance B has atomic mass number 32 and half life of...
JEE MainPhysicsEasy
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QJEE MAIN 2023
A coil is placed in magnetic field such that plane of coil is perpendicular to the direction of magnetic field. The magnetic flux through a...
JEE MainPhysicsMedium
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QJEE MAIN 2023
$\mathrm{KClO}_3+6 \mathrm{FeSO}_4+3 \mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{KCl}+3 \mathrm{Fe}_2\left(\mathrm{SO}_4\right)_3+3 \mathrm{H}_2 \mathrm{O}$ The above reaction was studied at 300 K by monitoring the concentration of $\mathrm{FeSO}_4$ in...
JEE MainChemistryEasy
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QJEE MAIN_2023
A long solenoid is formed by winding 70 turns cm–1. If 2.0 A current flows, then the magnetic field produced inside the solenoid is ___________....
JEE MainPhysicsEasy
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QJEE MAIN
According to law of equipartition of energy the molar specific heat of a diatomic gas at constant volume where the molecule has one additional vibrational...
JEE MainPhysicsMedium
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QJEE MAIN 2023
A solution of sugar is obtained by mixing 200 g of its 25% solution and 500 g of its 40% solution (both by mass). The...
JEE MainChemistryEasy
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QJEE MAIN 2023
In the reaction given below:
JEE MainChemistryHard
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QJEE MAIN 2023
As shown in the figure, a long straight conductor with semicircular arc of radius $\frac{\pi}{10} \mathrm{~m}$ is carrying current $\mathrm{I}=3 \mathrm{~A}$. The magnitude of the...
JEE MainPhysicsEasy
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QJEE MAIN 2023
The number of incorrect statement/s about the black body from the following is _______ (A) Emit or absorb energy in the form of electromagnetic...
JEE MainChemistryHard
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QJEE MAIN 2023
Solid fuel used in rocket is a mixture of $\mathrm{Fe}_2 \mathrm{O}_3$ and Al (in ratio 122 ). The heat evolved (kJ) per gram of the...
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