what (tragically) would a person with hearing difficulties to if told that there was a "lump in their cake"?
not much on it's own, but if mixed with vinegar & plaster of paris, forms a very powerful solvent suitable for paint thinning, removing tough stains, burning through solid metal or adding that extra "kick" to any meat or fish dish.
the real question was a mix between about 8 or 9 different questions, so I can't remember it.