On placing an inverted tumbler over a burning candle, the flame extinguishes after some time. This is because of non availability of

Options

A. oxygen
B. water vapours
C. carbon dioxide
D. wax

Answer

**Step-by-Step Solution:**

1. **Understanding the Scenario**: When a burning candle is placed under an inverted tumbler, the flame eventually goes out. This indicates that something essential for the burning process is no longer available.

2. **Identifying the Requirements for Combustion**: For combustion (burning) to occur, certain conditions must be met. The most crucial requirement is the presence of oxygen.

3. **Analyzing the Effect of the Tumbler**: When the tumbler is inverted over the candle, it traps the air inside. As the candle burns, it consumes the oxygen present in the air.

4. **Recognizing the Role of Oxygen**: As the candle continues to burn, the oxygen level inside the tumbler decreases. Once the oxygen is depleted, the candle cannot sustain the combustion process, leading to the extinguishing of the flame.

5. **Conclusion**: Therefore, the flame goes out due to the non-availability of oxygen.

**Final Answer**: The flame extinguishes after some time because of the non-availability of oxygen.

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