Basically, there are chests in rooms that each mirror another room. Each chest's contents is the opposite of the opposite room's contents.
Every chest is filled with what looks like water.
But touching the water for an extended period of time causes extreme damage to the limb that touched it. This cannot be fatal, if a limb is put in it, but can be if it comes into contact with the head/torso.
There needs to be seven pairs.
The plan so far is:
HF - NaOH (aq)
Hot glycerol - Cold acetone
Water with vibrio vulnificus (modified) - Concentrated disinfectant
Poison - Venom
Radioactive waste - Catharsis 9(Fictitious thing designed to kill cancer, but kills all cells)
Parasites - Decomposers
Stimulant - Depressant
Of these seven pairs, are they likely to cancel each other's effects out to keep a human from being harmed by them?