question_answer 19)

Give the names of the elements present in the following compounds. (a) Quick lime                       (b) Hydrogen bromide      (c) Baking powder               (d) Potassium sulphate  

Answer:

(a) Quick lime is CaO. Elements present are calcium and oxygen. (b) Hydrogen bromide is HBr. Elements present are hydrogen and bromine. (c) Baking powder is NaHCO3. Elements present are sodium, hydrogen, carbon and oxygen (d) Potassium sulphate is K2SO4. Elements present are potassium, sulphur and oxygen.