Which one of the following is formed (mainly) when red phosphorus i...

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Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at \( 803 \mathrm{~K} \) ?
P
[JEE Main-2021]
W)
(a) White phosphorus
(b) Yellow phosphorus
(c) \( \beta \)-Black phosphorus
(d) \( \alpha \)-Black phosphorus
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