Chemistry The two metal ions that cause hardness to water are: Sodium, Potassium Calcium, Magnesium Sodium, Calcium Sodium, Magnesium Sodium, Potassium Calcium, Magnesium Sodium, Calcium Sodium, Magnesium ANSWER DOWNLOAD EXAMIANS APP
Chemistry The minimum energy required for an effective collision is Free energy Activation energy Internal energy Threshold energy Free energy Activation energy Internal energy Threshold energy ANSWER DOWNLOAD EXAMIANS APP
Chemistry The metal used for making aircrafts and rockets is Lead Aluminium Copper Nickel Lead Aluminium Copper Nickel ANSWER DOWNLOAD EXAMIANS APP
Chemistry What is the product formed when sodium bicarbonate is heated strongly? Sodium Carbonate Sodium Monoxide Sodium Peroxide Sodium Hydroxide Sodium Carbonate Sodium Monoxide Sodium Peroxide Sodium Hydroxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry Detergents are None of these Sodium salts of fatty acids Sodium salts of sulphonic acids Sodium salt of benzoic acid None of these Sodium salts of fatty acids Sodium salts of sulphonic acids Sodium salt of benzoic acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry Activated Charcoal is used to remove colouring matter from pure substances by Oxidation Adsorption Reduction Bleaching Oxidation Adsorption Reduction Bleaching ANSWER DOWNLOAD EXAMIANS APP
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