Manual review recommended: automated enrichment was incomplete for this item. The original answer and options were preserved. No Gemini key is configured. Add GEMINI_API_KEY to the local server environment or save a Gemini provider key in Settings.

The electrochemical series ranks elements by their standard electrode potentials. Metals located above hydrogen in this series have a more negative reduction potential, meaning they are stronger reducing agents than hydrogen. Consequently, these metals can donate electrons to hydrogen ions in water, effectively reducing them to hydrogen gas while the metal itself becomes oxidized.

According to the electrochemical series, zinc is more reactive than copper. In a displacement reaction, a more reactive metal displaces a less reactive metal from its salt solution. Zinc loses electrons more readily than copper, facilitating the reduction of copper ions.

The electrochemical series ranks elements by their standard reduction potentials. It is essential for predicting the feasibility of metal extraction (e.g., displacement reactions), determining the effectiveness of sacrificial anodes for corrosion protection, and comparing the relative reactivity of metals. Because it provides a quantitative basis for these three distinct chemical behaviors, all listed statements are correct.

This is a single displacement reaction. Because lead is more reactive than copper, it displaces copper from the copper(II) chloride solution. The reaction follows the equation: Pb(s) + CuCl2(aq) -> PbCl2(aq) + Cu(s). Consequently, lead chloride is formed in the solution, and copper metal is deposited.

Metals that are less reactive than hydrogen in the electrochemical series cannot displace hydrogen from dilute acids. Mercury (Hg) has a positive standard reduction potential, meaning it is a noble metal that does not react with non-oxidizing acids like dilute HCl.

The electron-releasing tendency of a metal is determined by its position in the electrochemical series. Metals higher in the series have a greater tendency to lose electrons and act as reducing agents. Zinc is a stronger reducing agent than copper, and copper is stronger than silver. Therefore, the correct order of decreasing electron-releasing tendency is Zn > Cu > Ag.

Based on the standard electrochemical series, calcium is more reactive than zinc, iron, and copper. Calcium is an alkaline earth metal that reacts vigorously with water and acids, whereas transition metals like iron, zinc, and copper are significantly less reactive and occupy lower positions in the activity series.

Reactivity in metals is determined by their ability to lose electrons. Based on the electrochemical series, sodium (alkali metal) is the most reactive, followed by magnesium (alkaline earth metal), then zinc (transition metal), and finally copper (noble metal), which is the least reactive of the group.

The electrochemical series ranks metals by their standard reduction potentials. Metals with a negative reduction potential (like Al, Pb, Ba) can displace hydrogen from acids. Mercury (Hg) has a positive reduction potential (+0.85 V), meaning it is a weaker reducing agent than hydrogen and cannot displace hydrogen ions from water or acids.