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d and f Block Elements

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Q JEE MAIN 2024
The electronic configuration of $\mathrm{Cu}($ □ II) is $3 \mathrm{~d}^9$ whereas that of $\mathrm{Cu}(\mathrm{I})$ is $3 \mathrm{~d}^{10}$. Which of the following is correct?
JEE Main Chemistry Easy
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Q JEE MAIN 2024
Consider the following reaction $\mathrm{MnO}_2+\mathrm{KOH}+\mathrm{O}_2 \rightarrow \mathrm{~A}+\mathrm{H}_2 \mathrm{O}$ Product ' $A$ ' in neutral or acidic medium disproportionate to give products ' $B$ ' and...
JEE Main Chemistry Medium
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Q JEE MAIN 2024
Among $\mathrm{CrO}, \mathrm{Cr}_2 \mathrm{O}_3$ and $\mathrm{CrO}_3$, the sum of spin-only magnetic moment values of basic and amphoteric oxides is $\_\_\_\_$ $10^{-2} \mathrm{BM}$ (nearest integer).
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Q JEE MAIN 2024
The spin only magnetic moment value of the ion among Ti^(2+),V^(2+),Co^(3+) and Cr^(2+), that acts as strong oxidising agent in aqueous solution is BM (Near...
JEE Main Chemistry Hard
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Q JEE MAINS 2024
The element which shows only one oxidation state other than its elemental form is :
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Q JEE-Main 2024
Iron (III) catalyses the reaction between iodide and persulphate ions, in which A. $\mathrm{Fe}^{3+}$ oxidises the iodide ion B. $\mathrm{Fe}^{3+}$ oxidises the persulphate ion C....
JEE Main Chemistry Medium
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Q JEE MAIN 2024
The difference in the 'spin-only' magnetic moment values of $\mathrm{KMnO}_4$ and the manganese product formed during titration of $\mathrm{KMnO}_4$ against oxalic acid in acidic medium...
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Q JEE MAIN 2024
The metal that shows highest and maximum number of oxidation state is:
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Q JEE MAIN 2024
Which one of the following complexes will exhibit the least paramagnetic behaviour ? [Atomic number, Cr=24,Mn=25,Fe=26,Co=27 ]
JEE Main Chemistry Easy
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Q JEE MAIN 2024
The number of element from the following that do not belong to lanthanoids is : Eu,Cm,Er,Tb,Yb and Lu
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