The correct formula of permanganic acid is
$HMn{O_4}$
$HMn{O_5}$
${H_2}Mn{O_4}$
${H_2}Mn{O_3}$
Which of the following compounds is metallic and ferromagnetic ?
Transition metals show paramagnetism
The 'spin only' magnetic moment value of $\mathrm{MO}_4{ }^{2-}$ is . . . . . BM. (Where $\mathrm{M}$ is a metal having least metallic radii. among $\mathrm{Sc}, \mathrm{Ti}, \mathrm{V}, \mathrm{Cr}, \mathrm{Mn}$ and $\mathrm{Zn}$ ).
(Given atomic number: $\mathrm{Sc}=21, \mathrm{Ti}=22, \mathrm{~V}=23$, $\mathrm{Cr}=24, \mathrm{Mn}=25$ and $\mathrm{Zn}=30)$
Which of the following is not correct about transition metals
Metal-metal bonding is more frequent in $4d$ or $5d$ series than in $3d$ series due to