Chemistry What is the principal ore of aluminium ? Bauxite Copper Lignite Dolomite Bauxite Copper Lignite Dolomite ANSWER DOWNLOAD EXAMIANS APP
Chemistry The total energy of revolving electron in an atom Cannot be negative Will always be positive Can have any value above zero Can never be positive Cannot be negative Will always be positive Can have any value above zero Can never be positive ANSWER DOWNLOAD EXAMIANS APP
Chemistry An atom of an element has atomic number 17 and mass number 36. The number of neutrons in its nucleus is 36 19 17 53 36 19 17 53 ANSWER DOWNLOAD EXAMIANS APP
Chemistry The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is 5x 7.2 x 5x/36 x/6 5x 7.2 x 5x/36 x/6 ANSWER DOWNLOAD EXAMIANS APP
Chemistry For a spontaneous chemical process, the free energy change is Negative Depends on whether the reaction is exothermic or endothermic Positive Zero Negative Depends on whether the reaction is exothermic or endothermic Positive Zero ANSWER DOWNLOAD EXAMIANS APP
Chemistry The property of hydrogen which distinguishes it from alkali metals is Its reducing character Its non-metallic character Its electropositive character Its affinity for non-metal Its reducing character Its non-metallic character Its electropositive character Its affinity for non-metal ANSWER DOWNLOAD EXAMIANS APP
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