That would completely depend on how thorough the screening is. For most drug test like those in the army and legal system you would simply test positive for an opiate based narcotic. Vicodin is synthetic whereas morphine is made from poppies so it is possible to distinguish between natural "opiates" and synthetic "opiods".
Yes it is an opiate just like morphine and heroin.
An opioid
yes
no opana is oxymorphhone, or oxy-morphine
Yes it will
yes
yes it will.
The only way to "clean" your system of morphine is to not take it.
Yes, Hydrocodone and Demerol are both opiates and will show up as "Opiate" on a drug screen.
the answer is yes for sure
Yes, they are both opiates.
Yes it certainly does...