The lack of techtonics on the Moon is a consequence of the Moon having cooled down throughout so it doesn't have a molten core anymore. With Europa we can actu

The lack of techtonics on the Moon is a consequence of the Moon having cooled down throughout so it doesn't have a molten core anymore. With Europa we can actually observe plate techtonics in the continent sized ice sheets covering its surface and due to the evidence of activity we can infer that there must still be enough heat generated inside to keep things moving. Either the decay of radioisotopes inside or tidal flexing causing heat. Regarding acidity, life has to have some source of energy to get going and that's probably going to have to be a source of reactive chemicals.