Question

zinc liberates hydrogen gas when reacted with dilute hydrochloric acid whereas copper does not. Explain with the help of chemical equation

Answer 1

Answer:

As we have studied the reactivity series of metals.

Copper lies lower than Hydrogen, whereas Zinc is above Hydrogen.

Explanation:

Therefore Zinc can easily liberate Hydrogen as compared to Copper.

Reactions :

Zn + HCl ---------> H2

Cu + HCl ----------> No reaction

Answer 2

Answer:

The position of zinc in reactivity series is above hydrogen whereas that of copper is below hydrogen. That's why zinc displaces hydrogen from dilute hydrochloric acid whereas copper does not.

Zn + 2HCl - - - > ZnCl2 + H2