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d and f Block Elements

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Q JEE MAIN 2022
In neutral or alkaline solution, $\mathrm{MnO}_4^{-}$ oxidises thiosulphate to:
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Q JEE MAIN 2022
Which of the following 3d-metal ion will give the lowest enthalpy of hydration $\left(\Delta_{\text {hyd }} \mathrm{H}\right)$ when dissolved in water?
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Q JEE MAIN 2022
Which of the following pair is not isoelectronic species? (At. no. Sm, 62; Er, 68: Yb, 70: Lu, 71; Eu, 63: Tb, 65; Tm, 69)
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Q JEE MAIN 2022
The reaction of zinc with excess of aqueous alkali, evolves hydrogen gas and gives :
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Q JEE MAIN 2022
In metallurgy the term "gangue" is used for:
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Q JEE MAIN 2022
The dark purple colour of KMnO4 disappears in the titration with oxalic acid in acidic medium. The overall change in the oxidation number of manganese...
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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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Q JEE-Main 2022
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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Q JEE MAIN 2022
On the surface of polar stratospheric clouds, hydrolysis of chlorine nitrate gives A and B while its reaction with HCl produces B and C. A,...
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Q JEE MAIN 2022
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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