Question

Often a ground glass stopper gets the stuck in the
neck of a glass bottle containing 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 Sio, of glass with NaOH
3) The formation of Na,Co, in between by the
reaction of CO, of air and NaOH
4) Glass contains a boron compound which forms
a ppt with the NaOH solution​

Answer 1

Explanation:

The ground glass stopper is often seen to get stuck in the neck of glass bottles containing aq NaOH solution This is due to formation of solid Na

2

SiO

3

around the neck of the bottle

2NaOH(aq)+SiO

2

→

fuseswithglass

Na

2

SiO

3

(s)+H

2

O