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Which of the following statements regarding phosphorus is not true?

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Phosphorus belongs to the Group 15 of the periodic table

The element phosphorus is obtained by heating the rock phosphate with coke and sand in an electric furnace at about 1700 - 1800 K

Black phosphorus is the least stable form of the allotropes of phosphorus

The formula of phosphorus is $P_{4}$

answer is D.

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Detailed Solution

Phosphorus exists in three allotropic forms-white, red and black. Black phosphorus exists in one amorphous and three crystalline forms. Black phosphorus is the most stable form of the element.

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