Assuming you mean powdered tobacco (the traditional meaning of "snuff")...
Yes, it would show up if nicotine (or, more usually, a nicotine metabolite such as cotinine) was being tested for.
Since tobacco products are (at least in the US) perfectly legal for those over 18, you might wonder why anyone would even bother checking for it.
Some insurance companies specifically test for the presence of nicotine or nicotine metabolites in order to properly assess the risk in insuring a particular individual. It's occasionally used in pre-employment drug testing as well, also usually for insurance purposes since it's assumed the new employee will probably be participating in the employer's health plan.
Yes, if the presence of nicotine is what is being tested.
no they do not
yes. it does show up in urine test.
Yes
It will not show on any drug tests.
yes
never
shows up as a benzo
Spice doesn't show up in urine tests.
Yes, it will. It will show up in both blood and urine tests as an amphetamine.
2 days
It's not very effective and can show up on urine tests.
i prettysure in shows up in bloods but not urine