Question

Alcl3 is known as aluminium chloride while pcl3 is known as phosphorus trichloride. Why​

Answer 1

Answer:

it is because of iupac inorganic anomaly in nomenclature

Answer 2

Answer:

As aluminum chloride has valency 3 and it is stable whereas phosphorus has valency 3 and 5 so it forms trichloride and pentachloride