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d and f Block Elements

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Q JEE MAIN 2025
The molar mass of the water insoluble product formed from the fusion of chromite ore (${\rm{FeC}}{{\rm{r}}_2}{{\rm{O}}_4}$) with ${\rm{N}}{{\rm{a}}_2}{\rm{C}}{{\rm{O}}_3}$ in presence of ${{\rm{O}}_2}$ is _______ $...
JEE Main Chemistry Medium
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Q JEE MAIN 2025
The correct option with order of melting points of the pairs $({\rm{Mn}},{\rm{Fe}}),({\rm{Tc}},{\rm{Ru}})$ and $({\rm{Re}},{\rm{Os}})$ is :
JEE Main Chemistry Easy
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Q JEE MAIN 2025
Preparation of potassium permanganate from ${\rm{Mn}}{{\rm{O}}_2}$ involves two step process in which the 1st step is a reaction with KOH and ${\rm{KN}}{{\rm{O}}_3}$ to produce
JEE Main Chemistry Easy
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Q JEE MAIN 2025
Niobium (Nb) and ruthenium (Ru) have "x" and "y" number of electrons in their respective 4 d orbitals. The value of x + y is...
JEE Main Chemistry Easy
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