Often a ground glass stopper gets stuck in the neck of a glass bottle containing $\mathrm{NaOH}$ solution.…

Often a ground glass stopper gets stuck in the neck of a glass bottle containing $\mathrm{NaOH}$ solution. This is due to :
  1. The presence of dirt particles in between.
  2. The formation of solid silicate in between by the reaction of $\mathrm{SiO}_{2}$ of glass with $\mathrm{NaOH}$.
  3. The formation of $\mathrm{Na}_{2} \mathrm{CO}_{3}$ in between by the reaction of $\mathrm{CO}_{2}$ of air and $\mathrm{NaOH}$.
  4. Glass contains a boron compound which forms a precipitate with the $\mathrm{NaOH}$ solution.

Solution

\(\mathrm{SiO}_2+2 \mathrm{NaOH} ightarrow \underset{\substack{\text { Sodium } \\ \text { silicate }}}{\mathrm{Na}_2 \mathrm{SiO}_3}+\mathrm{H}_2 \mathrm{O}\)

Asked in: JEE-TOPICTESTS-CHEMISTRY

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