Which kind of rock is soluble in water?
Correct answer: Limestone
YSL
A terrible question. Limestone is NOT soluble in water, just as the description explains. It is only soluble when water has acid added to it, at which point it is an aqueous solution, not pure water.
Kiwozzie
So many limestone caves where I come from all caused by underground rivers.
Coo
It is only partially soluble. I have noticed this question setter lifts a lot of passages straight from Wikipedia.🙄
Vidavik
Wrong answer - limestone does NOT dissolve in water, e.g. two separate layers are formed, which apparently is not a real solution.