Stainless steel is non-corrosive. This character is more prominent in

Which of the following ions is green in colour?

$X + H^{+} \rightarrow Y + Na^{+} + H_2O$
$Y + KCl \rightarrow K_2Cr_2O_7 + NaCl$
Identify $X$ and $Y$ in the given reactions.

$A$ blue borax bead is obtained with:

Acidified potassium permanganate solution oxidises oxalic acid. The spin-only magnetic moment of the manganese product formed from the above reaction is $.... \, B.M.$ (Nearest Integer)

Ferric sulphate on heating gives: