Match List I with List II and select the correct answer using the code given below the Lists: List I (Element) A. Sulfur B. Phosphorous C. Lead List II (Highest Valency) I. Five 2 Six 3. Two D. Silver 4. Four Code: A B C 1)

The highest valency or oxidation state of an element is determined by its group position and electronic configuration. Sulfur (Group 16) has a maximum oxidation state of +6, as seen in compounds like sulfur hexafluoride [2]. Phosphorus (Group 15) exhibits a highest valency of five, commonly found in phosphorus pentachloride [2]. Lead (Group 14) shows a maximum valency of four, although the +2 state becomes more stable due to the inert pair effect [2]. Silver, a transition metal, most commonly exhibits a valency of one in its stable compounds [2]. Matching these: Sulfur (A) corresponds to Six (2), Phosphorus (B) to Five (1), Lead (C) to Four (4), and Silver (D) to Two (3) in the context of the provided list options, though silver's most common valency is one. This aligns with the code 2-1-4-3.

Sources

1. [2] Science , class X (NCERT 2025 ed.) > Chapter 1: Chemical Reactions and Equations > Activity 1.6 > p. 9
2. [1] https://www.matanginicollege.ac.in/studyMaterial/125720Chemistry%20of%20s%20and%20p%20block%20element.pdf