NCl₃ and PCl₃ gives different product on hydrolysis. why?

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• In NCl₃, nitrogen and chlorine have similar electronegativities resulting in non-polar bonds. Nitrogen doesn’t have empty d-orbitals so the hydrolysis takes place with the donation of lone pair of electron by nitrogen to the hydrogen atom of water.

NCl₃ + H₂O → NH₃ + 3HOCl

• In PCl₃, phosphorous is less electronegative than chlorine so, they form a polar bond. So, the positive polar charge on phosphorous attacks the lone pair of electrons on water molecule to give different products.

PCl₃ + 3H₂O → H₃PO₃ + 3HCl