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

Phosphorus on reaction with `Cl_(2)` forms two types of halides A and B .
A is `PCl_(5)` and B is `PCl_(3)`.
`P_(4)+10Cl_(2)to4PCl_(5)`
`P_(4)+6Cl_(2)toPCl_(3)`
When A and B are hydrolysed
(a) `underset("Phosphorus pentachloride")underset([A])(PCl_(5))+4H_(2)Otounderset("Phosphoric acid")(H_(3)PO_(4))+5HCl`
(b) `underset("Phosphorus trichloride ")underset([B])(PCl_(3))+3H_(2)Otounderset("Phosphoric acid")(H_(3)PO_(3))+3HCl`