Choose the correct statement (s) in following regarding compounds of alkaline earth metals.
I. Solubility of sulphates of Ca to Ba decreases progressively.
II. Solubility of carbonates in water increases top to bottom in a group.
III Hydrate forming tendency of alkaline earth metal decreases top to bottom.

Options

A. I and II
B. II and III
C. I and III
D. All of these

Answer

To solve the question regarding the compounds of alkaline earth metals, let's analyze each statement one by one.

### Step 1: Analyze Statement I
**Statement I:** "Solubility of sulphates of Ca to Ba decreases progressively."

- **Explanation:** The solubility of alkaline earth metal sulphates (like CaSO4, SrSO4, and BaSO4) indeed decreases as we move down the group from calcium to barium. This is primarily due to the decrease in hydration energy as the size of the metal cation increases. Therefore, this statement is **correct**.

### Step 2: Analyze Statement II
**Statement II:** "Solubility of carbonates in water increases top to bottom in a group."

- **Explanation:** The solubility of alkaline earth metal carbonates (like CaCO3, SrCO3, and BaCO3) actually decreases as we move down the group. This is because the larger cations have lower lattice energy compared to the hydration energy, leading to lower solubility. Therefore, this statement is **incorrect**.

### Step 3: Analyze Statement III
**Statement III:** "Hydrate forming tendency of alkaline earth metals decreases top to bottom."

- **Explanation:** The tendency to form hydrates does decrease down the group. This is because the hydration energy decreases as the size of the cation increases. Therefore, this statement is **correct**.

### Conclusion
From the analysis:
- Statement I is correct.
- Statement II is incorrect.
- Statement III is correct.

Thus, the correct answer is that statements I and III are correct.

### Final Answer:
The correct statements regarding compounds of alkaline earth metals are **I and III**.

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