Question

Standard hydrogen electrode (SHE) is a ______.

Options

• primary reference electrode

• secondary reference electrode

• metal - sparingly soluble salt electrode

• metal - metal ion electrode

Answer 1

Standard hydrogen electrode (SHE) is a primary reference electrode.

Explanation:

Standard hydrogen electrode (SHE) is primary reference electrode. SHE is represented by Pt(s)| H₂(g)| H⁺ (aq), is assigned a zero potential at all temperatures corresponding to reaction.

\[\ce{H+ (aq) + e- -> \frac{1}{2} H2(g)}\]