Which of the following has maximum first ionisation energy ?
$Pd$ (atomic no. $= 46$)
$Ag$ (atomic no. $= 47$)
$Rb$ (atomic no. $= 37$)
$Y$ (atomic no. $= 39$)
Which of the following is a colourless ion
Besides $Zn$ and $Cu$, german silver contains the metal
Which of the following may be colourless
Chloride of which of the following elements will be coloured
Four successive members of the first row transition elements are listed below with atomic numbers. Which one of them is expected to have the highest $E^o_{M^{3+} /M^{2+}}$ value ?