Crystals of which pair are isomorphous

Options

A. `ZnSO_(4),SnSO_(4)`
B. `MgSO_(4),CaSO_(4)`
C. `ZnSO_(4),MgSO_(4)`
D. `PbSO_(4),NiSO_(4)`

Explanation

To determine which pair of crystals are isomorphous, we need to analyze the crystal structures of the compounds given in the options. Isomorphous crystals have the same crystal structure and similar chemical composition.

### Step-by-Step Solution:

1. **Identify the Crystal Structures of Each Compound:**
- **ZnSO4 (Zinc Sulfate)**: The crystal structure is orthorhombic.
- **SnSO4 (Tin Sulfate)**: The crystal structure is tetrahedral.
- **MgSO4 (Magnesium Sulfate)**: The crystal structure is orthorhombic.
- **CaSO4 (Calcium Sulfate)**: The crystal structure is monoclinic.
- **PbSO4 (Lead Sulfate)**: The crystal structure is orthorhombic.
- **NiSO4 (Nickel Sulfate)**: The crystal structure is regular tetrahedral.

2. **Compare the Crystal Structures:**
- From the above, we can see:
- ZnSO4 (orthorhombic) and MgSO4 (orthorhombic) have the same crystal structure.
- SnSO4 (tetrahedral) and NiSO4 (tetrahedral) have the same crystal structure.
- CaSO4 (monoclinic) does not match with any other structure.

3. **Identify Isomorphous Pairs:**
- The pairs that have the same crystal structure are:
- **ZnSO4 and MgSO4** (both orthorhombic).
- **SnSO4 and NiSO4** (both tetrahedral).

4. **Conclusion:**
- The correct answer is the pair **ZnSO4 and MgSO4**, as they are isomorphous due to their orthorhombic structure.

### Final Answer:
**ZnSO4 and MgSO4 are isomorphous.**