`FeSO_4 .7H_2O` is known as green vitriol , it is shows isomorphism with

Options

A. `CaSO_(4).5H_2O`
B. `MnSO_(4)4H_2O`
C. `ZnSO_(4).7H_2O`
D. `CaCl_(2).2H_2O`

Answer

To determine which compound shows isomorphism with `FeSO4 . 7H2O` (green vitriol), we need to understand what isomorphism means in the context of chemistry. Isomorphic compounds are those that have the same type of crystal structure, even if they are composed of different elements.

### Step-by-Step Solution:

1. **Identify the Compound**: The given compound is `FeSO4 . 7H2O`, which is known as green vitriol. It contains iron (Fe), sulfate (SO4), and water of crystallization (7H2O).

2. **Understand Isomorphism**: Isomorphic compounds share the same crystal structure. This means that they can crystallize in the same form, even if their chemical compositions differ.

3. **Look for Similar Compounds**: We need to find compounds that have a similar structure to `FeSO4 . 7H2O`.

4. **Consider Common Isomorphic Compounds**:
- **ZnSO4 . 7H2O**: This is zinc sulfate heptahydrate. It has a similar structure to `FeSO4 . 7H2O` and is known to be isomorphic with it.
- **MgSO4 . 7H2O**: This is magnesium sulfate heptahydrate, commonly known as Epsom salt. It also shows isomorphism with `FeSO4 . 7H2O`.

5. **Conclusion**: Based on the analysis, `FeSO4 . 7H2O` shows isomorphism with both `ZnSO4 . 7H2O` and `MgSO4 . 7H2O`.

6. **Select the Correct Answer**: If the options provided include `ZnSO4 . 7H2O` and `MgSO4 . 7H2O`, then those are the correct answers for isomorphic compounds with `FeSO4 . 7H2O`.