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Phosphorus has three allotropic forms — (i) white phosphorus (ii) red phosphorus and (iii) black phosphorus. Write the difference between white and red phosphorus on the basis of their structure and reactivity.
Answers (1)
White phosphorous exists as a single molecule where the phosphorous atoms are -hybridised and has a tetrahedral structure with 6 P-P bonds. It is highly reactive due to the strained bond angles (60o).
Red Phosphorous on the other hands also has a tetrahedral structure, but each tetrahedron is linked to two others as shown below. The bond angle is much more relaxed, leading to a lower reactivity than White phosphorous.
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