Question

It is a pale yellow powder, but on exposure to moisture and $C{O}_2$ it turns to white. What are we talking about?

• A. $NaOH$
• B. $N{a}_2{O}_2$
• C. $N{a}_{2}O$
• D. $Both\left(b\&c\right)$

Answer 1

The correct option is B $N{a}_2{O}_2$

$2N{a}_2{O}_2+2H_{2}O\to 4NaOH+O_2$

$2N{a}_2{O}_2+2C{O}_2\to 2N{a}_{2}C{O}_3+O_2$

$NaOH$ and $N{a}_{2}C{O}_3$ are white in colour.