The acidic, basic or amphoteric nature of `Mn_2O_7, V_2O_5` and CrO are respectively

Options

A. acidic, acidic and basic
B. basic, amphoteric and acidic
C. acidic, amphoteric and basic
D. acidic, basic and amphoteric

Explanation

To determine the acidic, basic, or amphoteric nature of the oxides \( \text{Mn}_2\text{O}_7 \), \( \text{V}_2\text{O}_5 \), and \( \text{CrO} \), we can follow these steps:

### Step 1: Identify the Oxidation States
- For \( \text{Mn}_2\text{O}_7 \):
- Manganese (Mn) has an oxidation state of +7.
- For \( \text{V}_2\text{O}_5 \):
- Vanadium (V) has an oxidation state of +5.
- For \( \text{CrO} \):
- Chromium (Cr) has an oxidation state of +2.

### Step 2: Classify Each Oxide Based on Oxidation State
- **Acidic Oxides**: Typically have a high oxidation state.
- \( \text{Mn}_2\text{O}_7 \) with Mn in +7 state is classified as **acidic**.

- **Amphoteric Oxides**: Have a medium oxidation state and can react with both acids and bases.
- \( \text{V}_2\text{O}_5 \) with V in +5 state is classified as **amphoteric**.

- **Basic Oxides**: Usually have a low oxidation state.
- \( \text{CrO} \) with Cr in +2 state is classified as **basic**.

### Step 3: Summarize the Classifications
- \( \text{Mn}_2\text{O}_7 \) - Acidic
- \( \text{V}_2\text{O}_5 \) - Amphoteric
- \( \text{CrO} \) - Basic

### Step 4: Write the Final Answer
The acidic, basic, or amphoteric nature of \( \text{Mn}_2\text{O}_7 \), \( \text{V}_2\text{O}_5 \), and \( \text{CrO} \) is respectively:
- **Acidic**: \( \text{Mn}_2\text{O}_7 \)
- **Amphoteric**: \( \text{V}_2\text{O}_5 \)
- **Basic**: \( \text{CrO} \)

### Final Answer
**Acidic, Amphoteric, Basic** (for \( \text{Mn}_2\text{O}_7 \), \( \text{V}_2\text{O}_5 \), and \( \text{CrO} \) respectively).

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