Question

A mixture of $NaOH$ and yellow phosphorus on heating gives :

• A. $H_2$
• B. $O_2$
• C. $P{H}_3$
• D. $O_2$ and $P{H}_3$

Answer 1

The correct option is C $P{H}_3$

When a mixture of yellow phosphorous and sodium hydroxide is heated, sodium hypophosphite and phosphine are obtained.

The reaction is as follows:
$P_4+3NaOH+3H_{2}O\to 3Na{H}_{2}P{O}_2+P{H}_3\uparrow$