Chemistry The percentage of oxygen in air is approximately 0.01 1 0.78 0.21 0.01 1 0.78 0.21 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Permanent – hardness of water may be removed by addition of Lime Alum Sodium carbonate Potassium Permangante Lime Alum Sodium carbonate Potassium Permangante ANSWER DOWNLOAD EXAMIANS APP
Chemistry The trans-uranium elements are the chemical elements with atomic numbers greater than 96 86 92 89 96 86 92 89 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which variety of coal contains recognisable traces of the original plant material ? Lignite Peat Anthracite Bitumen Lignite Peat Anthracite Bitumen ANSWER DOWNLOAD EXAMIANS APP
Chemistry The depletion of ozone layer is due to Carbon dioxide Ethane Chloro fluoro carbon Sulphur dioxide Carbon dioxide Ethane Chloro fluoro carbon Sulphur dioxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry Normal rainwater has a pH level of 8.3 6.3 5.6 3.2 8.3 6.3 5.6 3.2 ANSWER DOWNLOAD EXAMIANS APP
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