Match the following
`{:("SET - I","SET - II"),("A) "Mn_(2)O_(7),"1) Covalent green oil"),("B) "CrO_(3),"2) Basic"),("C) "V_(2)O_(5),"3) amphoteric"),("D) "CrO,"4) anhydride of cromic acid"),(,"5) acidic"):}`

Options

A. `{:(A,B,C,D),(1,4,3,2):}`
B. `{:(A,B,C,D),(2,4,3,1):}`
C. `{:(A,B,C,D),(4,5,1,3):}`
D. `{:(A,B,C,D),(3,2,4,1):}`

Answer

To solve the matching question, we will analyze each compound in Set I and determine its corresponding description in Set II.

### Step-by-Step Solution:

1. **Identify Mn₂O₇:**
- Mn₂O₇ is known as manganese heptoxide. It is a covalent compound and is often referred to as "covalent green oil" due to its oily appearance and green color.
- **Match:** A) Mn₂O₇ → 1) Covalent green oil

2. **Identify CrO₃:**
- CrO₃ is chromium trioxide. It is known as the anhydride of chromic acid (H₂CrO₄). When dissolved in water, it forms chromic acid.
- **Match:** B) CrO₃ → 4) Anhydride of chromic acid

3. **Identify V₂O₅:**
- V₂O₅ is vanadium pentoxide. It exhibits amphoteric behavior, meaning it can react with both acids and bases.
- **Match:** C) V₂O₅ → 3) Amphoteric

4. **Identify CrO:**
- CrO is chromium(II) oxide. It is primarily a basic oxide, which means it reacts with acids to form salts and water.
- **Match:** D) CrO → 2) Basic

### Final Matching:
- A) Mn₂O₇ → 1) Covalent green oil
- B) CrO₃ → 4) Anhydride of chromic acid
- C) V₂O₅ → 3) Amphoteric
- D) CrO → 2) Basic

### Conclusion:
The correct matches are:
- A - 1
- B - 4
- C - 3
- D - 2