Reactivity of Metals and Displacement Reactions (HSC SSCE Chemistry): Quizzes

To prevent reaction with oxygen in air

metal + oxygen $\rightarrow$ metal oxide

Lose lustre, strength, malleability

$\text{Li}$, $\text{Na}$, $\text{K}$, $\text{Ca}$, $\text{Ba}$

Metal oxide + hydrogen gas

$\text{Cu}$, $\text{Ag}$, $\text{Au}$, $\text{Pt}$

Metal salt + hydrogen gas

Only species that change in reaction

Reddish-brown copper forms on zinc

When the metal is more reactive than ion