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QJEE MAIN 2025
Total number of non bonded electrons present in $\mathrm{NO}_{2}{ }^{-}$ ion based on Lewis theory is $\_\_\_\_$ .
JEE MainChemistryEasy
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QJEE MAIN 2025
In the sulphur estimation, 0.20 g of a pure organic compound gave 0.40 g of barium sulphate. The percentage of sulphur in the compound is...
JEE MainChemistryEasy
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QJEE MAIN 2025
Given below are two statements : Statement $(\mathrm{I}): \mathrm{NaCl}$ is added to the ice at $0^{\circ} \mathrm{C}$, present in the ice cream box to prevent...
JEE MainChemistryEasy
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QJEE MAIN 2025
Given below are two statements : Statement (I): In partition chromatography, stationary phase is thin film of liquid present in the inert support. Statement (II)...
JEE MainChemistryEasy
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QJEE MAIN 2025
For hydrogen like species, which of the following graphs provides the most appropriate representation of E vs Z plot for a constant n ?[0pt] [...
JEE MainChemistryEasy
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QJEE MAIN 2025
If $C$ (diamond) $\rightarrow C$ (graphite ) $+X \mathrm{~kJ} \mathrm{~mol}^{-1}$
$\mathrm{C}($ diamond $)+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{CO}_{2}(\mathrm{~g})+\mathrm{YkJmol}^{-1}$
C (graphite) $+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{CO}_{2}(\mathrm{~g})+\mathrm{ZkJmol}^{-1}$
at constant temperature. Then
JEE MainChemistryEasy
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QJEE MAIN 2025
First ionisation enthalpy values of first four group 15 elements are given below. Choose the correct value for the element that is a main component...
JEE MainChemistryEasy
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QJEE MAIN 2025
Match List - I with List - II :
Choose the correct answer from the options given below :
JEE MainChemistryMedium
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QJEE MAIN 2025
$\mathrm{O}_{2}$ gas will be evolved as a product of electrolysis of :[0pt] (A) an aqueous solution of $\mathrm{AgNO}_{3}$ using silver electrodes. (B) an aqueous solution...
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