Question:medium

Red phosphorus, when heated in a sealed tube at 803 K, gives 'X'. White phosphorus, when heated under high pressure at 473 K, gives 'Y'. X, Y respectively are

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Mnemonic: {R}ed $\rightarrow$ {A}lpha ($R-A$). {W}hite $\rightarrow$ {B}eta ($W-B$).

Updated On: Mar 31, 2026

$\beta$-Black phosphorus, $\alpha$-Black phosphorus
$\alpha$-Black phosphorus, $\beta$-Black phosphorus
$\alpha$-Black phosphorus, $\alpha$-Black phosphorus
$\beta$-Black phosphorus, $\beta$-Black phosphorus

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The Correct Option is B

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