Chemistry The most abundant rare gas in the atmosphere is He Xe Ne Ar He Xe Ne Ar ANSWER DOWNLOAD EXAMIANS APP
Chemistry Permanent – hardness of water may be removed by addition of Alum Potassium Permangante Lime Sodium carbonate Alum Potassium Permangante Lime Sodium carbonate ANSWER DOWNLOAD EXAMIANS APP
Chemistry Pollutant from motor car exhaust that causes mental disease is Lead NO2 Hg SO2 Lead NO2 Hg SO2 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Atoms of same element having different mass numbers are called________ Isobars Isomers Isotopes Isotones Isobars Isomers Isotopes Isotones ANSWER DOWNLOAD EXAMIANS APP
Chemistry Cinnabar is an ore/mineral of Lead Manganese Molybdenum Mercury Lead Manganese Molybdenum Mercury ANSWER DOWNLOAD EXAMIANS APP
Chemistry The gas that usually causes explosions in coal mines is Carbon monoxide Air Hydrogen Methane Carbon monoxide Air Hydrogen Methane ANSWER DOWNLOAD EXAMIANS APP
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