Find the incorrect match.

Options

A. Fine dust of aluminium - Paints and Lacquers
B. Reducing agent in the manufacture of dye-stuffs,paints etc.-Copper dust
C. For cutting tools and crushing machines -Chorme steel
D. For making cables, automobiles and aeroplane parts -Nickel steel

Explanation

To find the incorrect match among the given statements, we will analyze each option step by step.

### Step 1: Analyze the first statement
**Statement:** Zinc can be extracted from its ore by roasting followed by reduction with coke.
**Analysis:** This statement is correct. Zinc is typically extracted from its ore, zinc blende (ZnS), by roasting it to convert it into zinc oxide (ZnO), followed by reduction with coke (carbon) to produce zinc metal.

### Step 2: Analyze the second statement
**Statement:** In a reverberatory furnace, both oxidation and reduction processes can be carried out.
**Analysis:** This statement is also correct. A reverberatory furnace is designed to allow for both oxidation and reduction reactions, making it versatile for various metallurgical processes.

### Step 3: Analyze the third statement
**Statement:** Silver is purified by distillation and liquefaction.
**Analysis:** This statement is incorrect. Silver has a moderate boiling point (961.8 °C) and melting point (961.8 °C), which makes it unsuitable for purification by distillation or liquefaction. Instead, silver is typically purified using processes like electrolysis or cupellation.

### Step 4: Analyze the fourth statement
**Statement:** Highly pure metals are obtained by zone refining.
**Analysis:** This statement is correct. Zone refining is a method used to obtain highly pure metals, particularly in the semiconductor industry, by melting a small region of the material and allowing impurities to segregate.

### Conclusion
After analyzing all the statements, the incorrect match is:
**Option 3:** Silver is purified by distillation and liquefaction.

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