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Question

Which of the following isomers of phosphorus is thermodynamically most stable?

A
Red
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B
White
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C
Black
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D
Yellow
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Solution

The correct option is C Black
Black phosphorous is the thermodynamically stable form of phosphorous at room temperature and pressure.

It has an orthorhombic structure and is the least reactive allotrope; as a result of its lattice of interlinked six-membered rings where each atom is bonded to three other atoms.

Hence, option C is correct.

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