How many `1^(@)` carbon atom will be present in a simplest hydrocarbon having two `3^(@)` and one `2^(@)` carbon atom?

Answer

To determine how many 1-degree carbon atoms are present in the simplest hydrocarbon that has two 3-degree carbon atoms and one 2-degree carbon atom, we can follow these steps:

### Step 1: Understand Carbon Degrees
- **1-degree carbon atom (1°)**: A carbon atom that is attached to only one other carbon atom.
- **2-degree carbon atom (2°)**: A carbon atom that is attached to two other carbon atoms.
- **3-degree carbon atom (3°)**: A carbon atom that is attached to three other carbon atoms.

### Step 2: Visualize the Structure
- We need to create a hydrocarbon structure that includes:
- 2 carbon atoms that are 3° (each connected to 3 other carbon atoms)
- 1 carbon atom that is 2° (connected to 2 other carbon atoms)

### Step 3: Build the Hydrocarbon
- Start with the two 3° carbon atoms. To satisfy their degree, each must be connected to three other carbon atoms.
- The 2° carbon atom can be connected to the two 3° carbon atoms and one additional carbon atom.

### Step 4: Count the Carbon Atoms
- The simplest structure could look like this:
- Two 3° carbon atoms (let's label them C1 and C2).
- One 2° carbon atom (let's label it C3).
- To satisfy the connections, we can add one more carbon atom (C4) to connect to C3.

### Step 5: Identify 1° Carbon Atoms
- In this structure:
- The 3° carbon atoms (C1 and C2) do not contribute to 1° carbon atoms.
- The 2° carbon atom (C3) also does not contribute to 1° carbon atoms.
- The additional carbon atom (C4) can be a 1° carbon atom if it is only connected to one other carbon atom.

### Conclusion
- In this simplest hydrocarbon structure, there are **4** 1° carbon atoms.

### Final Answer
The simplest hydrocarbon with two 3° carbon atoms and one 2° carbon atom will have **4** 1° carbon atoms.

---