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