Question

White phosphorus can be separated from red phosphorus by________.

This question has multiple correct options
A

sublimation

B

dissolving in

C

distillation

D

heating with alkali solution

Medium
Updated on : 2022-09-05
Solution
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Correct options are B) and D)

White phosphorus is soluble in organic solvents such as .
Red phosphorus is insoluble in such solvents. Hence, white phosphorus can be separated from red phosphorus by dissolving in or .
White phosphorus reacts with caustic alkalies ( and ).
Red phosphorus does not react with caustic alkalies ( and ).
Hence, white phosphorus can be separated from red phosphorus by heating with an alkali solution.
White phosphorous is boiled with aqueous solution to obtain phosphine.
 

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