Red phosphorus can be prepared from white phosphorus by :

Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Compounds of Nitrogen and Phosphorus Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 12, 2026

Adding red colour to white phosphorus

Heating white phosphorus to red heat

Heating white phosphorus at 250 0 C or at low temperature in the presence of sun light.

Dissolving white phosphorus in NaOH

Text Solution

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The correct answer is:

Red phosphorus is inert towards sodium hydroxide but white phosphorus reacts according to following reaction.

P4 + 3NaOH + 3H2O v PH3 + 3NaH2PO2

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