The nature of CrO and `Cr_2O_3` is respectively

Options

A. Basic, Amphoteric
B. Basic, Basic
C. Amphoteric, Acidic
D. Acidic, Basic

Answer

To determine the nature of CrO (chromium(II) oxide) and Cr₂O₃ (chromium(III) oxide), we need to analyze their oxidation states and the general behavior of metal oxides based on these states.

### Step-by-Step Solution:

1. **Identify the Oxidation States:**
- For CrO, the oxidation state of chromium (Cr) is +2.
- For Cr₂O₃, the oxidation state of chromium is +3.

2. **Understand the Nature of Metal Oxides:**
- Generally, metal oxides can be classified as basic, amphoteric, or acidic based on the oxidation state of the metal.
- Basic oxides are typically formed by metals in lower oxidation states.
- Amphoteric oxides can react with both acids and bases.
- Acidic oxides are formed by metals in higher oxidation states.

3. **Analyze CrO:**
- Since CrO has chromium in the +2 oxidation state, it is likely to exhibit basic properties.
- Basic oxides tend to react with acids to form salts and water.

4. **Analyze Cr₂O₃:**
- Cr₂O₃ has chromium in the +3 oxidation state.
- Oxides with a +3 oxidation state often exhibit amphoteric behavior, meaning they can react with both acids and bases.

5. **Conclusion:**
- Based on the oxidation states:
- CrO is basic in nature.
- Cr₂O₃ is amphoteric in nature.

Thus, the correct answer is that CrO is basic and Cr₂O₃ is amphoteric.

### Final Answer:
- CrO is basic, and Cr₂O₃ is amphoteric.