Hydrated $C{u^{ + 2}}$ ion will be
Green
Violet
Blue
Colourless
Metal-metal bonding is more frequent in $4d$ or $5d$ series than in $3d$ series due to
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
Which of the following may be colourless
Which one of the following compounds is not coloured
The decrease in atomic volume from $Cr$ to $Cu$ is very negligible because