Stainless steel is an alloy of iron with
$8\% Cr, 50\% Mn$
$10\% Ni$, $2\% Mn$
$2\% Cr$, $3\% C$
$12\% Cr$, $1\% N$
Why does copper not replace hydrogen from acids?
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
How would you account for the following:
$(i)$ of the $d^{4}$ species, $Cr ^{2+}$ is strongly reducing while manganese $(III)$ is strongly oxidising.
$(ii)$ Cobalt $(II)$ is stable in aqueous solution but in the presence of complexing reagents it is easily oxidised.
$(iii)$ The $d^{1}$ configuration is very unstable in ions.
A copper salt is isomorphic with $ZnS{O_4}$, the salt will be
The oxoanion in which the oxidation state of the central atom is same as its group number in the periodic table is