A: Roasting process is involved in the metallurgy of Cu from Malachite ore.
R: Roasting is the process of heating the ore in absence of air.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
C. If Assertion is true statement but Reason is false, then mark
D. If both Assertion and Reason are false statements, then mark (4)

Answer

To analyze the given statements regarding the roasting process in the metallurgy of copper from malachite ore, let's break down the assertion and the reason step by step.

### Step 1: Understand the Assertion
The assertion states that "Roasting process is involved in the metallurgy of Cu from Malachite ore."

- **Explanation**: Malachite is a copper carbonate hydroxide mineral with the chemical formula \( \text{Cu}_2(\text{CO}_3)(\text{OH})_2 \). The metallurgy of copper involves extracting copper from its ores, and roasting is a crucial step in this process.

### Step 2: Understand the Reason
The reason states that "Roasting is the process of heating the ore in absence of air."

- **Explanation**: Roasting typically involves heating the ore in the presence of oxygen (air) to convert metal sulfides into oxides. However, the statement here is misleading as roasting is not done in the absence of air. Instead, it is done in the presence of air to facilitate the oxidation of the ore.

### Step 3: Analyze the Relationship
Now, let's analyze the relationship between the assertion and the reason.

- The assertion is **true** because roasting is indeed involved in the metallurgy of copper from malachite ore.
- The reason is **false** because roasting is performed in the presence of air, not in its absence.

### Conclusion
Based on the analysis:
- The assertion is true.
- The reason is false.

Thus, the correct conclusion is that the assertion is true, but the reason provided is incorrect.

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