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d and f Block Elements

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Q JEE-Main 2022
The reaction of $\mathrm{H}_2 \mathrm{O}_2$ with potassium permanganate in acidic medium leads to the formation of mainly:
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The compound(s) that is(are) removed as slag during the extraction of copper is i. (1) CaO (2) FeO (3) $\mathrm{Al}_2 \mathrm{O}_3$ (4) ZnO (5) NiO...
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The ‘f’ orbitals are half and completely filled, respectively in lanthanide ions (Given: Atomic no. Eu, 63; Sm, 62; Tm, 69; Tb, 65; Yb, 70;...
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In 3d series, the metal having the highest $\mathrm{M}^{2+} / \mathrm{M}$ standard electrode potential is
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Statement I : Leaching of gold with cyanide ion in absence of air / O2 leads to cyano complex of Au(III).
Statement II : Zinc...
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Q JEE-MAIN 2022
Which amongst the given plots is the correct plot for pressure (p) vs density (d) for an ideal gas?
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Manganese (VI) has ability to disproportionate in acidic solution. The difference in oxidation states of two ions it forms in acidic solution is______
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The measured BOD values for four different water samples (A-D) are as follows: $\mathrm{A}=3 \mathrm{ppm}: \mathrm{B}=18 \mathrm{ppm}: \mathrm{C}-21 \mathrm{ppm}: \mathrm{D}=4 \mathrm{ppm}$. The water samples which...
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Q JEE MAIN 2022
The most common oxidation state of Lanthanoid elements is +3. Which of the following is likely to deviate easily from +3 oxidation state?
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Which one of the following is an example of disproportionation reaction?
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