Chemistry - Complete Pblock- Question with Solution | TestHub

Hint: ${\mathrm{SiO}}_2(\mathrm{s})+{\mathrm{F}}_2(\mathrm{g})\to {\mathrm{SiF}}_4(\mathrm{aq}.)+{\mathrm{O}}_2(\mathrm{g})$ ${\mathrm{SiO}}_2(\mathrm{s})+6\mathrm{HF}$ (aq.) $\to {\mathrm{H}}_2{\mathrm{SiF}}_6$ (aq.) $+2{\mathrm{H}}_2\mathrm{O}(\ell )$ ${\mathrm{SiO}}_2(\mathrm{s})+2\mathrm{NaOH}($ aq. $)\to {\mathrm{Na}}_2{\mathrm{SiO}}_3(\mathrm{s})+{\mathrm{H}}_2\mathrm{O}(\ell )$