/6 Science Quiz (for 12 to 16 years old): Quiz 6 1 / 6The most important ore of aluminium is bauxite calamine calcite galena 2 / 6Permanent hardness of water may be removed by the addition of potassium permanganate lime sodium carbonate alum 3 / 6Most soluble in water is common salt sulphur sugar camphor 4 / 6Potassium nitrate is used in glass medicine salt fertiliser 5 / 6Which of the following was to be discovered first in the chromospheres of the sun? Neon Krypton Xenon Helium 6 / 6Soda water contains carbonic acid carbon dioxide nitrous acid sulphuric acid Your score is 0% Restart quiz Next quiz Please rate the quiz Send feedback
