Question

Sodium metal reacts with water to produce hydrogen gas what best describes this reaction

Answer 1

a single replacement

Step-by-step explanation:

Answer 2

Single displacement or reduction/oxidation

Step-by-step explanation:

In a single-displacement reaction, one element exchanges partners with another.

`\rm 2Na + 2H$_2$O $\longrightarrow \,$ 2NaOH + H$_2$`

This is a single-displacement reaction, because the element Na exchanges partners with H.

This is also a reduction/oxidation (redox) reaction, because the oxidation number of Na increases from 0 to +1 (oxidation), while the oxidation number of H decreases from +1 to 0 (reduction),

The most common types of reactions are:

Combination

Decomposition

Single displacement

Double displacement

Reduction/oxidation