Chemistry The method that cannot be used for removing permanent hardness of water is adding sodium carbonate distillation boiling adding caustic soda adding sodium carbonate distillation boiling adding caustic soda ANSWER DOWNLOAD EXAMIANS APP
Chemistry Greenhouse effect is caused by Carbon monoxide Carbon dioxide Nitrogen dioxide Nitrogen Carbon monoxide Carbon dioxide Nitrogen dioxide Nitrogen ANSWER DOWNLOAD EXAMIANS APP
Chemistry Helium gas is used in gas balloons instead of hydrogen gas because it is More stable More abundant than hydrogen Lighter than hydrogen Non-combustible More stable More abundant than hydrogen Lighter than hydrogen Non-combustible ANSWER DOWNLOAD EXAMIANS APP
Chemistry The metal used to galvanise iron to protect it from rusting is Antimony Zinc Lead Chromium Antimony Zinc Lead Chromium ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is the best fuel in terms of energy released per gram of fuel? Butane Methane Hydrogen Ethanol Butane Methane Hydrogen Ethanol ANSWER DOWNLOAD EXAMIANS APP
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