Which of the following have maximum number of unpaired electrons
$Fe^{3+}$
$Fe^{2+}$
$Co^{2+}$
$Co^{3+}$
Which of the following complex will show maximum paramagnetism ?
Which of the following contain $'Sn'$ metal
Mercury is a liquid at $0\,^o C$ because of
Which of the following statements is incorrect
Metal-metal bonding is more frequent in $4d$ or $5d$ series than in $3d$ series due to