Which of the following will not produce ethane?

Options

A. Reduction of `CH_3COOH` with `HI//P_4`
B. Reduction of `CH_3COCH_3` with `HI//P_4`
C. Sodalime decarboxylation of sodium proplonate
D. Hydrogenation of ethene In the presence of NI

Explanation

To determine which of the following reactions will not produce ethane, we will analyze each option step by step.

### Step 1: Analyze the first reaction
**Reaction:** Reduction of CH3CH2OH (ethanol) with HI and P4

- When ethanol is treated with 6 molecules of HI in the presence of phosphorus at a temperature of 500°C, it undergoes reduction.
- The products of this reaction are ethane (C2H6), water (H2O), and iodine (I2).

**Conclusion:** This reaction produces ethane.

### Step 2: Analyze the second reaction
**Reaction:** Reduction of CH3COCH3 (acetone) with HI and P4

- When acetone is heated with 4 molecules of HI in the presence of red phosphorus at 423 K, it undergoes reduction.
- The products of this reaction are propane (C3H8), water (H2O), and iodine (I2).

**Conclusion:** This reaction produces propane, not ethane.

### Step 3: Analyze the third reaction
**Reaction:** Sodium decarboxylation of sodium propionate

- In this reaction, sodium propionate (C2H5COONa) is treated with soda lime (NaOH + CaO).
- The decarboxylation process yields ethane (C2H6) and sodium carbonate (Na2CO3).

**Conclusion:** This reaction produces ethane.

### Step 4: Analyze the fourth reaction
**Reaction:** Hydrogenation of ethene in the presence of nickel

- Ethene (C2H4) is hydrogenated in the presence of a nickel catalyst.
- The reaction adds hydrogen across the double bond of ethene, producing ethane (C2H6).

**Conclusion:** This reaction produces ethane.

### Final Conclusion
Based on the analysis of all four reactions, the only reaction that does not produce ethane is the **second reaction**: the reduction of acetone with HI and P4, which produces propane instead.

### Answer
The correct answer is **option 2: Reduction of CH3COCH3 with HI and P4.**

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