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Dil. HCl is added to Zn granules.” How will you prove that chemical change has taken place here? Support your response with two arguments.
Answer:
Zinc is more reactive than Hydrogen, so, when Zinc granules will be added to dil HCl, they will replace Hydrogen in a single displacement reaction and Zinc Chloride will be formed.
The reaction has occurred can be confirmed by the following changes seen in the reaction mixture:
- Evolution of hydrogen gas which can be seen in the form of bubbles
- A white colored precipitate of zinc chloride will be formed
