Chemistry The first metal used by a man was Bronze Brass Silver Copper Bronze Brass Silver Copper ANSWER DOWNLOAD EXAMIANS APP
Chemistry The atmospheric gas that is mainly responsible for Green House effect : Ozone Nitrogen Oxygen Carbondioxide Ozone Nitrogen Oxygen Carbondioxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry The total energy of revolving electron in an atom Cannot be negative Will always be positive Can never be positive Can have any value above zero Cannot be negative Will always be positive Can never be positive Can have any value above zero ANSWER DOWNLOAD EXAMIANS APP
Chemistry Main source of lead pollution is from Sewage Leaded gasoline Tobacco Insecticides Sewage Leaded gasoline Tobacco Insecticides ANSWER DOWNLOAD EXAMIANS APP
Chemistry Oxygen which is vital for life is a product of photosynthesis and comes from Oxides of mineral elements Carbon dioxide Water Carbonates from soil Oxides of mineral elements Carbon dioxide Water Carbonates from soil ANSWER DOWNLOAD EXAMIANS APP
Chemistry Biofertilizers convert nitrogen to ________ . Nitrates Ammonia Amino acids Nitrogenase Nitrates Ammonia Amino acids Nitrogenase ANSWER DOWNLOAD EXAMIANS APP
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