Chemistry The first metal used by man was gold bronze iron copper gold bronze iron copper ANSWER DOWNLOAD EXAMIANS APP
Chemistry Gunpowder consits of a mixture of Nitre, sulphur and charcoal Sulphur, sand and charcoal Sand and TNT TNT and charcoal Nitre, sulphur and charcoal Sulphur, sand and charcoal Sand and TNT TNT and charcoal ANSWER DOWNLOAD EXAMIANS APP
Chemistry An example of heterocyclic compound is Benzene Anthracene Furan Naphthalene Benzene Anthracene Furan Naphthalene ANSWER DOWNLOAD EXAMIANS APP
Chemistry The most abundant element in the earth’s atmosphere is Nitrogen Oxygen Argon Krypton Nitrogen Oxygen Argon Krypton ANSWER DOWNLOAD EXAMIANS APP
Chemistry Pollutant from motor car exhaust that causes mental disease is Hg SO2 Lead NO2 Hg SO2 Lead NO2 ANSWER DOWNLOAD EXAMIANS APP
Chemistry The gas produced in marshy places due to decomposition of vegetation is Carbon monoxide Methane Sulphur dioxide Carbon dioxide Carbon monoxide Methane Sulphur dioxide Carbon dioxide ANSWER DOWNLOAD EXAMIANS APP
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