Chemistry Ruby and sapphire are oxides of Copper Aluminium Tin Iron Copper Aluminium Tin Iron ANSWER DOWNLOAD EXAMIANS APP
Chemistry Magnetite is Fe3O4 FeCO3 Fe2O3 2Fe2O3. 3H2O Fe3O4 FeCO3 Fe2O3 2Fe2O3. 3H2O ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following is a micro-element ? Hydrogen Chlorine Oxygen Nitrogen Hydrogen Chlorine Oxygen Nitrogen ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one element has the lowest electronegativity value Francium Radium Fluorine Chlorine Francium Radium Fluorine Chlorine ANSWER DOWNLOAD EXAMIANS APP
Chemistry The manufacturing of iron from iron ore involves the process of Electrolysis Reduction Fractional distillation Oxidation Electrolysis Reduction Fractional distillation Oxidation ANSWER DOWNLOAD EXAMIANS APP
Chemistry Ozone layer is present in Exosphere Ionosphere Stratosphere Troposphere Exosphere Ionosphere Stratosphere Troposphere ANSWER DOWNLOAD EXAMIANS APP
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