Which one of the following characteristics of the transition metals is associated with their catalytic activity
Variable oxidation states
High enthalpy of atomization
Paramagnetic behaviour
Colour of hydrated ions
Why does copper not replace hydrogen from acids?
The metal ion which does not form coloured compound is
Which of the following has highest paramagnetic character
The trivalent ion having largest size in following is
Mercury is a liquid at $0\,^o C$ because of