Which of the following is simple ether ?

Options

A. `C_(2)H_(5)OCH_(3)`
B. `CH_(3)OCH_(3)`
C. `C_(6)H_(5)OCH_(3)`
D. All of these

Answer

To determine which of the given options is a simple ether, we can follow these steps:

### Step 1: Understand the Definition of Simple Ethers
- Simple ethers are compounds that have the general structure R-O-R', where R and R' are the same alkyl groups. This means that both sides of the ether functional group (the oxygen atom) must be attached to identical alkyl groups.

### Step 2: Analyze the Given Options
- Let's analyze the options provided in the question:
1. C2H5OCH3
2. CH3OCH3
3. C2H5OCH3 (repeated option)
4. All of these

### Step 3: Identify the Alkyl Groups in Each Option
- **Option 1: C2H5OCH3**
- Here, R = C2H5 (ethyl) and R' = CH3 (methyl). Since R and R' are different, this is not a simple ether.

- **Option 2: CH3OCH3**
- Here, R = CH3 (methyl) and R' = CH3 (methyl). Since R and R' are the same, this is a simple ether.

- **Option 3: C2H5OCH3** (same as Option 1)
- This is again not a simple ether for the same reason as in Option 1.

- **Option 4: All of these**
- This option cannot be correct since we have already identified that not all options are simple ethers.

### Step 4: Conclusion
- Based on the analysis, the only option that qualifies as a simple ether is **Option 2: CH3OCH3**.

### Final Answer
- The simple ether among the given options is **CH3OCH3**.