Question

When white phosphorus is heated at $473K$ under high pressure, what will happen?

• A. $\alpha$- Black phosphorus is formed
• B. $\beta$-Black phosphorus is formed
• C. Red phosphorus is formed
• D. No change would be observed

Answer 1

Answer: (B)

When white phosphorus is heated at $473K$ under high pressure $\beta$-Black phosphorus is formed.
Whitephosporous $\to \beta$-Black phosphorus.