Steel is manufactured from
Wrought iron
Cast iron
$(a)$ and $ (b)$ both
Haematite
The number of unpaired electrons in $M{n^{ + 3}}$ is
Technetium, the element below manganese in the Periodic Table, would be expected to have high values for its
$(I)$ melting point $(II)$ boiling point $(III)$ density
Among $\mathrm{VO}_2^{+}, \mathrm{MnO}_4^{-}$and $\mathrm{Cr}_2 \mathrm{O}_7^{2-}$, the spin-only magnetic moment value of the species with least oxidising ability is...................$BM$ (Nearest integer).
(Given atomic member $\mathrm{V}=23, \mathrm{Mn}=25, \mathrm{Cr}=24$ )
The addition of metals like $Cr,\,Mn,\,W$ and $Ni$ to ordinary steel makes it
Which of the following will show increase in weight when kept in magnetic field