(B) Black phosphorus has $2$ allotropic forms: $1$. $\alpha$-black phosphorus: Formed when red phosphorus is heated in a sealed tube at $803 \ K$. $2$

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

(B) Black phosphorus has $2$ allotropic forms: $1$. $\alpha$-black phosphorus: Formed when red phosphorus is heated in a sealed tube at $803 \ K$. $2$. $\beta$-black phosphorus: Formed when white phosphorus is heated at $473 \ K$ under high pressure.