Ionisation potential values of $d-$ block elements as compared to ionization potential value of $ f-$ block elements are
Higher
Equal
lower
All of these
When an acidified solution of ferrous ammonium sulphate it treated with potassium permanganate solution, the ion which is oxidised is
The transition metals exhibit higher enthalpies of atomisation due to
White silver surface turns black when $O_3$ is passed over it. This is due to the formation of
Essential constituent of an amalgam is
The catalyst used in the contact process is