Which of the following compounds are not isomorphous?
a. Copper sulphate and zine sulphate
b. Zinc sulphate and manganeous sulphate
c. Calcium carbonte and ferrous sulphate
d. Zine sulphate and ferrous sulphate

Explanation

To determine which of the given compounds are not isomorphous, we need to analyze each pair based on the criteria for isomorphism. The criteria include having a similar crystalline form, similar number of water molecules (if they are hydrates), and the ability to form mixed crystals or overgrowth.

### Step-by-Step Solution:

1. **Identify the Compounds:**
- a. Copper sulfate (CuSO4·7H2O) and zinc sulfate (ZnSO4·7H2O)
- b. Zinc sulfate (ZnSO4·7H2O) and manganese sulfate (MnSO4·7H2O)
- c. Calcium carbonate (CaCO3) and ferrous sulfate (FeSO4·7H2O)
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