Chemistry The first metal used by a man was Brass Silver Copper Bronze Brass Silver Copper Bronze ANSWER DOWNLOAD EXAMIANS APP
Chemistry The most abundant rare gas in the atmosphere is He Xe Ar Ne He Xe Ar Ne ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one is a naturally occuring noble gas Argon Potassium Sodium Boron Argon Potassium Sodium Boron ANSWER DOWNLOAD EXAMIANS APP
Chemistry What is the element that is in the highest percentage in the composition of the earth ? Silicon Magnesium Oxygen Iron Silicon Magnesium Oxygen Iron ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one is not a pure form of carbon Gold Graphite Diamond Coal Gold Graphite Diamond Coal ANSWER DOWNLOAD EXAMIANS APP
Chemistry An important green-house gas other than methane being produced from the agricultural fields is Sulphur dioxide Ammonia Arsine Nitrous oxide Sulphur dioxide Ammonia Arsine Nitrous oxide ANSWER DOWNLOAD EXAMIANS APP
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