All of the elements in the Group 18(0) - Inert Gases family are odourless. All the elements in this family (exc. Radon) are also highly unreactive and so, are used as carriers. Elements in the Inert...
it isn't!
Yes, it is.
The freon itself is odorless, although the oil in the system does have an odor.
Yes, pure LSD is odorless and colorless.