Which of the following is a correct statement?

Options

A. Calamine is the ore of zinc
B. Pyrolusite is the ore of manganese
C. Cassiterite is the ore of calcium
D. Calcite is the ore of calcium

Explanation

To determine which of the statements regarding ores is correct, let's analyze each option step by step.

1. **Statement 1: Calamine is the ore of zinc.**
- **Analysis:** Calamine is known to be zinc carbonate (ZnCO3). Since it contains zinc, this statement is correct.
- **Conclusion:** True.

2. **Statement 2: Pyrolucite is the ore of manganese.**
- **Analysis:** Pyrolucite is manganese dioxide (MnO2). It is indeed an ore of manganese, confirming that this statement is also correct.
- **Conclusion:** True.

3. **Statement 3: Cassiterite is the ore of calcium.**
- **Analysis:** Cassiterite is actually tin dioxide (SnO2), which means it is the ore of tin, not calcium. Therefore, this statement is incorrect.
- **Conclusion:** False.

4. **Statement 4: Calcite is the ore of calcium.**
- **Analysis:** Calcite is calcium carbonate (CaCO3), which makes it the ore of calcium. Thus, this statement is correct.
- **Conclusion:** True.

**Final Conclusion:**
- The correct statements are 1, 2, and 4. The false statement is 3.

**Answer: Options 1, 2, and 4 are correct.**

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