Chemistry The two metal ions that cause hardness to water are: Sodium, Potassium Sodium, Magnesium Calcium, Magnesium Sodium, Calcium Sodium, Potassium Sodium, Magnesium Calcium, Magnesium Sodium, Calcium ANSWER DOWNLOAD EXAMIANS APP
Chemistry The chemical name of quartz is Calcium oxide Sodium phosphate Sodium silicate Calcium phosphate Calcium oxide Sodium phosphate Sodium silicate Calcium phosphate ANSWER DOWNLOAD EXAMIANS APP
Chemistry A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? From brown to orange-red From brown to blue-black From pink to blue-green From blue to pink From brown to orange-red From brown to blue-black From pink to blue-green From blue to pink ANSWER DOWNLOAD EXAMIANS APP
Chemistry Sour taste of ‘Coca Cola’ is due to the presence of Hydrochloric acid Formic acid Phosphoric acid Acetic acid Hydrochloric acid Formic acid Phosphoric acid Acetic acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry For generation of biogas, the materials commonly used are Forest residues Aquatic plants Animal wastes Crop residues Forest residues Aquatic plants Animal wastes Crop residues ANSWER DOWNLOAD EXAMIANS APP
Chemistry Limestone is a raw material used by which industry? Cement Aluminium Petrochemicals Fertilizers Cement Aluminium Petrochemicals Fertilizers ANSWER DOWNLOAD EXAMIANS APP
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