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

Quiz for Verb: 'To Touch'

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

'Touch off' - Cause a problem to occur

'Touch upon' - Mention

'Touch up' - Touch someone in a sexual way

'Touch on' - Mention

'Touch for' - Borrow money

'Touch up' - Improve the appearance of something

'Touch down' - Land (planes)