The correct option is(D): - 2 and - 1.
The reaction involved is \(BaO_2 + H_2SO_4 \rightarrow BaSO_4 + H_2O_2\) The most electronegative atom, oxygen, in \(BaSO_4\) and
\(H_2O_2\) has - 2 and - 1 oxidation state respectively.
Ion having highest hydration enthalpy among the given alkaline earth metal ions is:
In which form does \(BeCl_{2}\) exist in the solid state, vapor state and high temperature?
(1) Polymeric, Dimeric, Monomeric
(2) Dimeric, Polymeric, Monomeric
(3) Monomeric, Dimeric, Polymeric
(4) Polymeric, Monomeric, Dimeric