MCQ
In which compound peroxide bond is present
- A$Pb_2O_3$
- B$SiO_2$
- ✓$BaO_2$
- D$PbO_2$
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(image) $\frac{{conc.\,HN{O_3}}}{{conc.\,{H_2}S{O_4}}}X$
the structure of the major product $'X'$ is
$(I)\, [Ni(CN)_4]^{2-}\,\,\,(II)\, [NiCl_4]^{2-}\,\,\,(III)\,Ni(CO_4)\,\,\,$
$(IV)\, [Ni(H_2O)_6 ]^{2+}$
$A$ || $B$

