Dil. HCl is added to Zn granules.” How will you prove that chemical change has taken placehere? Support your response with two arguments.

When dilute hydrochloric acid (HCl) is added to zinc (Zn) granules, a chemical reaction takes place. This can be proven by the following two arguments:

1. Observation of Gas Evolution: When dilute HCl is added to Zn granules, hydrogen gas is evolved. This can be observed as bubbles coming out from the solution. The chemical reaction can be represented as follows: Zn + 2HCl → ZnCl2 + H2↑. The upward arrow indicates the evolution of hydrogen gas. The evolution of gas is a strong indication of a chemical change.

2. Change in Temperature: The reaction between dilute HCl and Zn granules is an exothermic reaction, meaning it releases heat. Therefore, the temperature of the solution will increase. This change in temperature is another indication of a chemical change.

In conclusion, the evolution of gas and the change in temperature are two strong arguments that a chemical change has taken place when dilute HCl is added to Zn granules.