Chemistry The two metal ions that cause hardness to water are: Calcium, Magnesium Sodium, Magnesium Sodium, Potassium Sodium, Calcium Calcium, Magnesium Sodium, Magnesium Sodium, Potassium Sodium, Calcium ANSWER DOWNLOAD EXAMIANS APP
Chemistry The chemical name of 'Plaster of Paris' commonly used for setting broken bones is Calcium sulphate Calcium chloride Calcium carbonate Calcium nitrate Calcium sulphate Calcium chloride Calcium carbonate Calcium nitrate ANSWER DOWNLOAD EXAMIANS APP
Chemistry In drinking water supply, which of the following treatments is not involved Disinfection Sedimentation Softening Coagulation Disinfection Sedimentation Softening Coagulation ANSWER DOWNLOAD EXAMIANS APP
Chemistry In upper layer of atmosphere ozone is formed by The action of nitrogen on oxygen in atmosphere The combination of oxygen molecules The action of ultraviolet rays on oxygen Subjecting oxygen to high pressure The action of nitrogen on oxygen in atmosphere The combination of oxygen molecules The action of ultraviolet rays on oxygen Subjecting oxygen to high pressure ANSWER DOWNLOAD EXAMIANS APP
Chemistry What is the mass percentage of carbon in carbon dioxide (CO2) 0.323 0.273 0.201 0.158 0.323 0.273 0.201 0.158 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is a natural polymer? Starch Nylon Bakelite Polythene Starch Nylon Bakelite Polythene ANSWER DOWNLOAD EXAMIANS APP
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