$$Zn(s)+ H_2SO_4(aq) \rightarrow ZnSO_4(aq) + H_2(g)$$

Observations:

- The reaction is vigorous and exothermic, producing a lot of heat and hydrogen gas.

- The zinc granules dissolve in the sulfuric acid, forming zinc sulfate solution.

- Hydrogen gas escapes from the solution as bubbles.

- The solution turns from colorless to pale green due to the formation of copper sulfate.

Safety Precautions:

- Sulfuric acid is corrosive and can cause severe burns. Wear protective clothing, gloves, and eye protection.

- Hydrogen gas is flammable and can form explosive mixtures with air. Keep the reaction area well-ventilated.

- Conduct the experiment in a fume hood or outdoors.