Which substances is soluble in water sand sugar oil glass?
Well- sand drops to the bottom, so insoluble. Sugar dissolves in
water- warm water dissolves it quicker (coffee, tea), oil sits in
layer on the top so does not dissolve. Glass- well luckily glass is
insoluble in water so coke and stuff like that can be contained in
glass bottles.
A purist who measures solubility in atoms or molecules per litre
would argue that that all of the insoluble substances dissolve too
some extent.