\(B.O\) \(\mathop {\mathop {{O_2}}\limits_2 }\limits_{Para} \to \mathop {\mathop {O_2^ + }\limits_{2.5} }\limits_{Para} \) \(B.O\) \(\mathop {\mathop {{O_2}}\limits_2 }\limits_{Para} \to \mathop {\mathop {O_2^{2 - }}\limits_1 }\limits_{Dia} \)
$(i)\, KCl$ અથવા $MgO$ $(ii) \,LiF$ અથવા $LiBr$ $(iii)\, Mg_3N_2$ અથવા $NaCl$