Question

Pick out the incorrect statement.

• A. Except nitrogen, all the elements of group 15 exist in allotropic modification
• B. Only at high temperatures, greater than 1,070 K, phosphorus vapours dissociates into $P_{2}$ molecules
• C. Red phosphorus is obtained by heating white phosphorus at 540-570 K in the absence of air for several hours
• D. White phosphorus is more reactive, but less soluble in $CS_{2}$ (and other organic solvents) than red phosphorus

Answer 1

Answer: (D)

White phosphorus is readily soluble in $CS_{2}$ and other organic solvent, but red phosphorus is insoluble in these.