Which of the following option is correct regarding following two statements?
Rotation about carbon-single bond in ethane is almost free.
It has not been possible to separate and isolate the different conformational isomers of ethane.
Choose the correct option.

Options

A. I is true
B. II is true
C. Both are true
D. None is true

Answer

To solve the question regarding the two statements about ethane, we will analyze each statement step by step.

### Step 1: Analyze the First Statement
**Statement 1:** "Rotation about carbon-single bond in ethane is almost free."

- Ethane (C2H6) consists of two carbon atoms connected by a single bond (C-C).
- In a single bond, such as the C-C bond in ethane, there is a sigma (σ) bond formed by the overlap of sp³ hybridized orbitals from each carbon atom.
- This type of bond allows for free rotation. As a result, the atoms attached to the carbon atoms can rotate around the C-C bond without breaking the bond.
- Therefore, this statement is **correct**.

### Step 2: Analyze the Second Statement
**Statement 2:** "It has not been possible to separate and isolate the different conformational isomers of ethane."

- Conformational isomers are different spatial arrangements of atoms that can be interconverted by rotation around single bonds.
- In ethane, there are multiple conformations (e.g., staggered and eclipsed forms) that can be achieved by rotating around the C-C bond.
- However, these conformations are not stable enough to be isolated as separate entities; they interconvert rapidly at room temperature.
- Therefore, this statement is also **correct**.

### Conclusion
Both statements are correct regarding ethane.

### Final Answer
Both statements are correct.