Ethylene gives epoxy ethane on oxidation with

Options

A. `KMnO_(4)//OH^(-)`
B. `K_(2)Cr_(2)O_(7)//H^(+)`
C. `Ag_(2)O //200^(@)C`
D. `H_(2)SO_(4)//170^(@)C`

Explanation

To solve the question, "Ethylene gives epoxy ethane on oxidation with," we need to analyze the options provided and determine which oxidizing agent can convert ethylene (C2H4) into epoxy ethane (C2H4O).

### Step-by-Step Solution:

1. **Understanding Ethylene and Epoxy Ethane**:
- Ethylene (C2H4) is an alkene with a double bond between two carbon atoms.
- Epoxy ethane, also known as ethylene oxide, is a cyclic ether formed by the oxidation of ethylene.

2. **Analyzing the Oxidizing Agents**:
- **Option 1: KMnO4 in the presence of OH-**:
- KMnO4 is a strong oxidizing agent. In a basic medium, it typically converts alkenes into diols (glycols) rather than epoxides. Therefore, this option does not yield epoxy ethane.

- **Option 2: K2Cr2O7 in acidic medium**:
- K2Cr2O7 (potassium dichromate) is also a strong oxidizing agent, but it is not effective in oxidizing alkenes to epoxides. It generally oxidizes alkenes to carbonyl compounds (aldehydes or ketones) or carboxylic acids, not epoxides. Thus, this option is incorrect.

- **Option 3: Ag2O at 200°C**:
- Silver oxide (Ag2O) is known to oxidize alkenes to form epoxides when heated. Therefore, this option is likely to yield epoxy ethane from ethylene.

- **Option 4: H2SO4**:
- Concentrated sulfuric acid (H2SO4) reacts with alkenes to form alkyl hydrogen sulfate, which can lead to the formation of alcohols upon hydrolysis, but it does not directly produce epoxides. Thus, this option is also incorrect.

3. **Conclusion**:
- The correct oxidizing agent that converts ethylene to epoxy ethane is **Ag2O at 200°C**.

### Final Answer:
Ethylene gives epoxy ethane on oxidation with **Ag2O at 200°C**.