Question

On reaction with Cl2, phosphorus forms two types of halides ‘A’ and ‘B’. Halide A is yellowish-white powder but halide ‘B’

Answer 1

Phosphorus on reaction with Cl2 forms two types of halides A and B. Therefore, these halides must be PCI 5 and PCl 3. Since, halide A is yellowish-white solid but halide B is a colourless oily liquid thus, A is PCI 5 and B is PCl3.