The correct option is **A. Oxide**. ### Detailed Explanation: 1. **Understanding Binary Compounds**: - A binary compound is a chemical compound that consists of exactly two different elements. In this case, one of those elements is oxygen. 2. **Definition of Oxides**: - An oxide is a specific type of binary compound where oxygen is combined with another element. For example, when oxygen combines with hydrogen, it forms water (H₂O), which is a binary compound of hydrogen and oxygen, specifically an oxide of hydrogen. 3. **Why Option A is Correct**: - Since the question specifically asks for a binary compound of oxygen with another element, the term "oxide" directly fits this definition. Oxides can be formed with various elements, including metals (like iron oxide, Fe₂O₃) and nonmetals (like carbon dioxide, CO₂). ### Analysis of Other Options: - **Option B: Element**: - This option is incorrect because "element" refers to a pure substance that cannot be broken down into simpler substances by chemical means. It does not describe a compound, let alone a binary compound of oxygen. - **Option C: Carbon**: - This option is also incorrect. Carbon is an element, not a compound. While carbon can form compounds with oxygen (like carbon dioxide, CO₂), it does not represent the binary compound itself. The term "carbon" does not imply the presence of oxygen in a compound. - **Option D: Nitrogen**: - Similar to option C, nitrogen is an element and not a binary compound. While nitrogen can form compounds with oxygen (like nitrogen dioxide, NO₂), it does not describe a binary compound of oxygen. Therefore, it does not fit the definition provided in the question. ### Summary of Key Points: - A binary compound consists of two different elements. - An oxide is a binary compound specifically involving oxygen and another element. - The correct answer to the question is **A. Oxide** because it directly describes a compound formed with oxygen. - The other options (B, C, D) do not represent binary compounds of oxygen and are therefore incorrect. ### Revision Summary: - **Binary Compound**: A compound made of two different elements. - **Oxide**: A binary compound where one element is oxygen. - **Correct Answer**: A. Oxide. - **Incorrect Options**: B (Element), C (Carbon), D (Nitrogen) do not describe binary compounds of oxygen.