Is wax adhesive or cohesive?
It is both. Anybody who has stuck a candle onto a candle base plate know that you first drip hot wax onto the plate and then quickly affix the candle to the wax before it cools and hardens. The wax sticking to the plate is adhesion, the wax sticking to itself is cohesion.
That's not a right question. everything is cohesive or adhesive. it's just how well the properties are. for alcohol, dropping a droplet of it on to wax paper will cause it to stick to the surface badly meaning that it's adhesive properties suck. It's cohesion also sucks because the molecules don't hold together well at all when moving the droplet on the wax paper.