Is 'To Boil' Separable or Inseparable? - Phrasal Verb Quiz

Quiz for Verb: 'To boil'

Is the phrasal verb 'boil' separable or inseparable in the following examples?

'Boil over' - When people lose their tempers and things get nasty

'Boil over' - When a hot liquid spills out of a container

'Boil up' - Cook or heat something to boiling point

'Boil down to' - Amount to

'Boil down' - Simplify, reduce to the essentials

'Boil up' - Feel a negative emotion strongly

'Boil down' - Heat something to reduce its volume