A match with $\boldsymbol{Q}, \boldsymbol{S} \quad \mathrm{Bi}^{3+}+\mathrm{H}_2 \mathrm{O} \longrightarrow[\mathrm{BiO}]^{+}+2 \mathrm{H}^{+}$ B match with $\boldsymbol{S} \mathrm{NaAlO}_2+2 \mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{Al}(\mathrm{OH})_3+\mathrm{NaOH}$ C match with $\boldsymbol{R} \quad 2 \mathrm{SiO}_4^{4-}+2 \mathrm{H}^{+} \longrightarrow \mathrm{Si}_2 \mathrm{O}_7^{6-}+\mathrm{H}_2 \mathrm{O}$ Pyrosilicate is formed by treating orthosilicate with acid. D match with $\boldsymbol{Q}, \boldsymbol{R} \mathrm{Na}_2 \mathrm{~B}_4 \mathrm{O}_7 \underset{\text { or } \mathrm{H}_2 \mathrm{SO}_4}{\stackrel{\mathrm{HCl}}{\mathrm{O}_3}} \mathrm{H}_3 \mathrm{BO}_3$
$$
\mathrm{Na}_2 \mathrm{~B}_4 \mathrm{O}_4 \stackrel{\mathrm{H}_2 \mathrm{O}}{\longrightarrow} \mathrm{H}_3 \mathrm{BO}_3
$$