Jee Main
P Block Elements
JEE Main 2022 (Online) 30th June Morning Shift
MCQ+4 / -12022
A \(\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{}^{573\,K}}\) Red phosphorus \(\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{under\,pressure}^{heat\,;\,803\,K}}\) B
Red phosphorus is obtained by heating "A" at 573 K, and can be converted to "B" by heating at 803 K under pressure.
A and B, respectively, are