Time left 1 Carbon, diamond and graphite are together called allotropes isomers isomorphs isotopes 2 Potassium nitrate is used in medicine fertiliser salt glass 3 Permanent hardness of water may be removed by the addition of sodium carbonate alum potassium permanganate lime 4 Soda water contains carbonic acid sulphuric acid carbon dioxide nitrous acid 5 The most important ore of aluminium is galena calamine calcite bauxite 6 Most soluble in water is camphor sulphur common salt sugar 7 Which of the following was to be discovered first in the chromospheres of the sun? Krypton Xenon Neon Helium 8 Monazite is an ore of titanium zirconium iron thorium
Skip This