Chemistry
Grade-10
Easy
Question
A glass vessel containing NaOH solution is noticed after some time. A white coloured deposit in glass vessels is observed during this change. State the reason for the mentioned change.
- NaOH solution reacts with atmospheric oxygen to give white precipitates when standing for long time.
- NaOH solution reacts with dilute acids to give salt and water.
- After some time, the NaOH solution turns into white precipitates sue to presence of impurities
- SiO2 present in glass reacts with NaOH to give salt as sodium silicate which deposits in the glass vessels.
Hint:
Glass is a polymer its main composition is silica.
The correct answer is: SiO2 present in glass reacts with NaOH to give salt as sodium silicate which deposits in the glass vessels.
Glass is a polymer its main composition is silica.
A glass vessel containing NaOH solution is noticed after some time. A white coloured deposit in glass vessels is observed during this change. SiO2 present in glass reacts with NaOH to give salt as sodium silicate which deposits in the glass vessel.
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