How does a ketone react with pcl5? ,

When ketone is reacted with phosphorous pentachloride, chlorination takes place at the carbonyl carbon with substitution of the oxygen atom to give a geminal dichloride (with 2 Cl atoms on same carbon) according to the following equation: 

so we can say that acetone is converted into 2,2-dichloropropane by action of PCl₅

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being

a polar bond is formed when electrons are shared unevenly between atoms