Activity . Take a few zinc granules in a conical flask or a test tube. Add dilute hydrochloric acid or sulphuric acid to this (Fig. .
). CAUTION: Handle the acid with care. Do you observe anything happening around the zinc granules? Touch the conical flask or test tube.
Is there any change in its temperature? Take lead nitrate solution in a test tube. Add potassium iodide solution to this. What do you observe?