Chemistry Which one of the following mineral does not contain oxygen ? Cryolite Haematite Bauxite Calcite Cryolite Haematite Bauxite Calcite ANSWER DOWNLOAD EXAMIANS APP
Chemistry Burning pyrites ore gives out Nitrogen dioxide gas Sulphur dioxide gas Nitric oxide gas Carbon dioxide gas Nitrogen dioxide gas Sulphur dioxide gas Nitric oxide gas Carbon dioxide gas ANSWER DOWNLOAD EXAMIANS APP
Chemistry Helium gas is used in gas balloons instead of hydrogen gas because it is More stable Lighter than hydrogen More abundant than hydrogen Non-combustible More stable Lighter than hydrogen More abundant than hydrogen Non-combustible ANSWER DOWNLOAD EXAMIANS APP
Chemistry Maximum permissible concentration of total hardness in drinking water is 200 50 100 500 200 50 100 500 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Oxide of sulphur present in the atmosphere are washed down by rains to cause : Depletion of fossil fuel reserves Industrial smog formation Eutrophication in lakes Lowering of pH of soil Depletion of fossil fuel reserves Industrial smog formation Eutrophication in lakes Lowering of pH of soil ANSWER DOWNLOAD EXAMIANS APP
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