Enantiomers have: -

Options

A. all physical properties same except their action on plane polarized
light which is equal in magnitude but opposite in direction.
B. all chemical properties same except when reagent is chiral in that
case, reactivity of enantiomer will be different
C. opposite configuration of all chiral centers according to CIP rule.
D. superimposable image of each other

Answer

To answer the question "Enantiomers have:", we will evaluate the statements provided and determine which ones are correct regarding the properties of enantiomers.

### Step-by-Step Solution:

1. **Understanding Enantiomers**:
Enantiomers are a type of stereoisomer that are non-superimposable mirror images of each other. They typically arise when a molecule has one or more chiral centers.

**Hint**: Remember that enantiomers are related like left and right hands; they cannot be perfectly aligned even though they are similar.

2. **Statement Evaluation**:
- **Statement 1**: "All physical properties same except their action on the plane polarized light which is equal in magnitude but opposite in direction."
- This statement is **correct**. Enantiomers have identical physical properties (like boiling point, melting point, etc.) except for their optical activity. They rotate plane-polarized light in opposite directions (one clockwise and the other counterclockwise).

**Hint**: Focus on the concept of optical activity and how it differentiates enantiomers.

- **Statement 2**: "All chemical properties same except when reagent is chiral, reactivity of enantiomer."
- This statement is also **correct**. Enantiomers behave identically in reactions with achiral reagents, but they can react differently with chiral reagents because the spatial arrangement of atoms affects the interaction.

**Hint**: Consider how chiral environments can lead to different outcomes in reactions involving enantiomers.

- **Statement 3**: "Opposite configuration of all chiral centers according to CIP rule."
- This statement is **correct**. Enantiomers have opposite configurations at all chiral centers, which can be determined using the Cahn-Ingold-Prelog (CIP) priority rules.

**Hint**: Recall the CIP rules for assigning priorities to groups attached to chiral centers.

- **Statement 4**: "Superimposable image of each other."
- This statement is **incorrect**. Enantiomers are non-superimposable mirror images, meaning they cannot be aligned perfectly like two identical objects.

**Hint**: Visualize how two enantiomers would look in a mirror; they will always differ in orientation.

3. **Conclusion**:
Based on the evaluation of the statements:
- Statements 1, 2, and 3 are correct.
- Statement 4 is incorrect.

### Final Answer:
Enantiomers have the following properties:
- All physical properties same except their action on the plane polarized light which is equal in magnitude but opposite in direction.
- All chemical properties same except when reagent is chiral, reactivity of enantiomer.
- Opposite configuration of all chiral centers according to CIP rule.
- They are not superimposable images of each other.