Hydrogen

In which of the following reactions of hydrogen peroxide acts as an oxidizing agent (either in acidic, alkaline, or neutral medium)?
(i) \(2F{e}^{+2}+{H}_{2}{O}_{2}\to\)
(ii) \(2{\mathrm{MnO}}_{4}^{-}+6{\mathrm{H}}^{+}+5{\mathrm{H}}_{2}{\mathrm{O}}_{2}\to\)
(iii) \({I}_{2}+{H}_{2}{O}_{2}+2O{H}^{-}\to\)
(iv) \(M{n}^{+2}+{H}_{2}{O}_{2}\to\)

Given below are two statements :
Statement-I : Methane and steam passed over a heated Ni catalyst produces hydrogen gas.
Statement-II : Sodium nitrite reacts with \(\mathrm{NH}_4 \mathrm{Cl}\) to give \(\mathrm{H}_2 \mathrm{O}, \mathrm{N}_2\) and \(\mathrm{NaCl}\).
In the light of the above statements, choose the most appropriate answer from the options given below :

[JEE Main 2023, 11 Apr (Shift 1)]

Among the following, the correct statements are:
I. LiH, Be\({H}_{2}\) and Mg\({H}_{2}\) are saline hydrides with significant covalent character
II. Saline hydrides are volatile
III. Electron - precise hydrides are Lewis bases
IV. The formula for chromium hydride is CrH

Hydrogen peroxide, in the pure state, is