Chemistry Where does the oxygen that keeps us alive come from? Carbon dioxide Carbonates absorbed from soil Water Oxides of minerals Carbon dioxide Carbonates absorbed from soil Water Oxides of minerals ANSWER DOWNLOAD EXAMIANS APP
Chemistry The green colour seen in firework displays is due to the chloride salt of : Calcium Strontium Barium Sodium Calcium Strontium Barium Sodium ANSWER DOWNLOAD EXAMIANS APP
Chemistry What is the most commonly used substance in fluorescent tubes? Mercury vapour and argon Mercury oxide and neon Sodium vapour and neon Sodium oxide and argon Mercury vapour and argon Mercury oxide and neon Sodium vapour and neon Sodium oxide and argon ANSWER DOWNLOAD EXAMIANS APP
Chemistry The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind? 1/4 1/6 1/3 1/8 1/4 1/6 1/3 1/8 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Chemical composition of cement is Limestone, Clay and Gypsum Clay and Gypsum Limestone and Clay Limestone and Gypsum Limestone, Clay and Gypsum Clay and Gypsum Limestone and Clay Limestone and Gypsum ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following is an example of a gel ? Milk Cheese Face cream Shaving cream Milk Cheese Face cream Shaving cream ANSWER DOWNLOAD EXAMIANS APP
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