Black soot which is deposited on kerosene lamps after burning is called

Options

A. coke
B. lampblack
C. gas carbon
D. charcoal.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Context**: The question refers to the black soot that accumulates on kerosene lamps when they are used. This soot is a byproduct of burning fuel.

2. **Identifying the Cause**: When kerosene lamps burn, they do not always achieve complete combustion. Complete combustion occurs when there is enough oxygen to burn the fuel completely, producing carbon dioxide and water. Incomplete combustion, however, results in the formation of unburnt carbon particles.

3. **Recognizing the Byproduct**: The unburnt carbon particles that result from incomplete combustion are what we refer to as "black soot." This soot is primarily composed of carbon.

4. **Naming the Soot**: The black soot deposited on kerosene lamps can be referred to by different names. It is commonly known as "carbon black" or "lamp black." Both terms describe the same substance, which is the soot formed from the burning of kerosene.

5. **Conclusion**: Therefore, the black soot deposited on kerosene lamps after burning is called carbon black or lamp black.

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