Chemistry The two metal ions that cause hardness to water are: Sodium, Magnesium Sodium, Calcium Calcium, Magnesium Sodium, Potassium Sodium, Magnesium Sodium, Calcium Calcium, Magnesium Sodium, Potassium ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following metals is used to galvanise iron ? Mercury Copper Zinc Lead Mercury Copper Zinc Lead ANSWER DOWNLOAD EXAMIANS APP
Chemistry Poison used for killing rats is Calcium phosphide (Ca3P2) Zinc phosphide (Zn3P2) Magnesium nitride (Mg3N2) Magnesium phosphide (Mg3P2) Calcium phosphide (Ca3P2) Zinc phosphide (Zn3P2) Magnesium nitride (Mg3N2) Magnesium phosphide (Mg3P2) ANSWER DOWNLOAD EXAMIANS APP
Chemistry Chemically ‘Quick Silver is known as Mercury Aluminium Silver Copper Mercury Aluminium Silver Copper ANSWER DOWNLOAD EXAMIANS APP
Chemistry Vinegar is an aqueous solution of Citric acid Acetic acid Hydrochloric acid Oxalic acid Citric acid Acetic acid Hydrochloric acid Oxalic acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry The mass number of an atom is equal to the number of nucleons the number of protons the number of protons and electrons the number of neutrons the number of nucleons the number of protons the number of protons and electrons the number of neutrons ANSWER DOWNLOAD EXAMIANS APP
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