Glass reacts with HF to produce

Glass reacts with HF to produce
  1. $\mathrm{SiF}_{6}$
  2. $\mathrm{SiF}_{4}$ (Silicon tetra fluoride).
  3. $\mathrm{H}_{2} \mathrm{SiO}_{3}$
  4. $\mathrm{Na}_{3} \mathrm{AlF}_{6}$

Solution

Common glass consists of silica $\left(\mathrm{SiO}_{2}ight)$. When HF reacts with silica it will form $\mathrm{H}_{2} \mathrm{SiF}_{6}$ or SiF $_{4}$ Both can soluble in water which means that a fresh surface of $\mathrm{SiO}_{2}$ will be exposed to attack by HF.

Asked in: JEE-TOPICTESTS-CHEMISTRY

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