When an acidified solution of ferrous ammonium sulphate it treated with potassium permanganate solution, the ion which is oxidised is
$Mn{O_4}$
$NH_4^ + $
$F{e^{ + 2 }}$
$SO_4^{2 - }$
The anode mud in the electrolytic refining of silver contains
Which of the following pair of elements cannot form an alloy
Passing $H_2S$ gas into a mixture of $Mn^{+2}, Ni^{+2}, Cu^{+2}$ and $Hg^{2+}$ ions in an acidified aqueous solution precipitates
Correct order of atomic Radii (Metallic radii)
How do the oxidation states of the elements vary in the transition series?