On reaction with `Cl_(2)` phosphorus forms two types of halides 'A' and 'B'.
Halide 'A' is yellowish- white powder but halide 'B' is colourless oily liquid.
Identify A and B and write the formulae of their hydrolysis products.

Explanation

The available information suggests that halogens involved in two halides 'A' and 'B' is chlorine `PCl_(5)` (A) is a yellowish-white powder while `PCl_(3)(B)` is a colourless oily liquid. These are formed as follows :
`P_(4)(s) +underset(("excess"))(5Cl_(2)(g)) to underset(("yellowish white powder"))(4PCl_(5)(s))`
`P_(4)(s) +underset(("Limited "))(3Cl_(2)(g)) to underset("Colourless oily liquid")(4PCl_(3)(l))`
The products of hydrolysis are listed.
`PCl_(3)(l) +3H_(2)O(aq) to underset("Phosphorus acid")(H_(3)PO_(3)(s))+3HCl(aq)`
`PCl_(5)(s)+4H_(2)O(aq) to underset("Phosphoric acid")(H_(3)PO_(4)(s))+5HCl(aq)`