Which of the following compound is unsaturated hydrocarbon?

Options

A. `CH_(3)-oversetoverset(O)(||)(C)-CH_(3)`
B. `CH_(3)-C=N`
C.
D.

Answer

To determine which of the given compounds is an unsaturated hydrocarbon, we need to follow these steps:

### Step 1: Understand Unsaturated Hydrocarbons
Unsaturated hydrocarbons are compounds that contain carbon and hydrogen atoms and have at least one double bond (C=C) or triple bond (C≡C) between carbon atoms. They do not contain any functional groups other than carbon and hydrogen.

### Step 2: Analyze Each Compound
We will examine each option provided in the question to identify if it is an unsaturated hydrocarbon.

1. **Option A**: Check for functional groups or double/triple bonds.
2. **Option B**: Look for the presence of nitrogen or other atoms.
3. **Option C**: Determine if it has only single bonds between carbon atoms.
4. **Option D**: Identify if there is a double bond present.

### Step 3: Eliminate Saturated Compounds
- **Option A**: If it has a functional group (like -OH, -COOH, etc.), it is not an unsaturated hydrocarbon.
- **Option B**: If it contains nitrogen or any other element besides carbon and hydrogen, it cannot be classified as an unsaturated hydrocarbon.
- **Option C**: If it only has single bonds (C-C), it is a saturated hydrocarbon.

### Step 4: Identify the Unsaturated Hydrocarbon
- **Option D**: If this compound has a double bond (C=C), it qualifies as an unsaturated hydrocarbon.

### Conclusion
After analyzing all the options, we find that **Option D** is the only compound that is an unsaturated hydrocarbon due to the presence of a double bond.

### Final Answer
The correct answer is **Option D**.

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