When the matchstick is struck against rubbing surface, red phosphorous:

Options

A. gets converted into white phosphorous
B. reacts with potassium chlorate
C. ignite antimony trisulphide
D. none of the above

Explanation

**Step-by-Step Solution:**

1. **Understanding the Components**:
- A matchstick contains red phosphorus at its tip, along with other chemicals like potassium chlorate and antimony trisulfide.

2. **Striking the Matchstick**:
- When the matchstick is struck against the rubbing surface of the matchbox, friction generates heat.

3. **Chemical Reaction Initiation**:
- The heat produced by the friction causes a chemical reaction to occur at the tip of the matchstick.

4. **Conversion of Red Phosphorus**:
- Red phosphorus, which is stable at room temperature, is converted into white phosphorus due to the heat generated from striking the matchstick.

5. **Ignition of White Phosphorus**:
- White phosphorus is highly reactive and unstable. Once formed, it spontaneously ignites in the presence of oxygen in the air.

6. **Resulting Flame**:
- The ignition of white phosphorus leads to the combustion of the matchstick, producing a flame.

7. **Conclusion**:
- Therefore, the correct answer to the question is that red phosphorus is converted into white phosphorus when the matchstick is struck against the rubbing surface.

**Final Answer**: Red phosphorus is converted into white phosphorus.

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