Primarily the nicotene, but I believe that the manufacturers of cigarettes add in several more "secret" chemicals, poisons, and properties that increase the addictiveness of the cigarette.
Cocaine, pretty much any white drug.
Stimulating
Yes, pure LSD is odorless and colorless.
Milk is colorless, the white color is due to scatting of light... and is not odorless.
The colorless, odorless gases in cigarette smoke are:carbon monoxidecarbon dioxidewater vapournitrogen
the terms odorless ad colorless are quantitative terms
Yes. Argon is a colorless, odorless gas.
Water is usually a colorless liquid.
Its naturally odorless, but they add a smell to identify it
Argon is colorless and odorless
Its odorless and colorless.........
It is textureless, odorless, and colorless.
helium