Question

$Na$ + $O$ $\to$ $Y$

$Y$ + $H_{2}O$ $\to$ $Z$

The commercial name of Z is _________.

• A. Caustic potash
• B. Caustic Soda
• C. Natrium Hydroxide
• D. Potassium hydroxide

Answer 1

The correct option is B

Caustic Soda

Sodium reacts with oxygen to form sodium oxide which is basic in nature.

$4Na\left(s\right)+O_2\left(g\right)\to 2N{a}_{2}O\left(s\right)$

When sodium oxide(Y) reacts with water, sodium hydroxide(Z) is formed. This is commonly known as caustic soda.

$N{a}_{2}O\left(S\right)+H_{2}O\left(l\right)\to 2NaOH$
(Y) (Z)