Question

'$NaOH$ solution has some white deposit inside reagent bottle due to formation of $N{a}_{2}C{O}_3$ and $N{a}_{2}Si{O}_3$.'
Answer whether the above statement is true or false.

• A. True
• B. False
• C. Cannot be determined
• D. None of the above

Answer 1

The correct option is A True

The statement is true.

$NaOH$ absorbs atmospheric $C{O}_2$ and thus white deposit of $N{a}_{2}C{O}_3$ is formed. Also $Si{O}_2$ of glass reacts with $NaOH$ forming insoluble $N{a}_{2}Si{O}_3$ (white deposit).

$2NaOH+C{O}_2\to N{a}_{2}C{O}_3+H_{2}O$

$2NaOH+Si{O}_2\to N{a}_{2}Si{O}_3+H_{2}O$