In which if any of the beakers would you expect the solid to react and evolve hydrogen gas? Exlpain reasoning.

A student places some Zn(s) powder in a beaker of 1 M nitric acid, and some Cu(s) powder in another beaker of 1 M nitric acid. In which if any of the beakers would you expect the solid to react and evolve hydrogen gas? Exlpain reasoning.