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