What substances were used in the head of early matches to initiate combustion? I. Antimony trisulphide II. Potassium chlorate III. White phosphorus

प्रारंभिक माचिस की तीली में दहन (combustion) हेतु कौन से पदार्थ का उपयोग किया जाता था? I. ऐन्टिमनी ट्राइसल्फाइड II. पोटेशियम ड्रोरेट III. श्वेत फास्फोरस

Early matches (strike-anywhere matches) used three key substances in their heads to initiate combustion: white phosphorus, potassium chlorate, and antimony trisulphide. White phosphorus is highly flammable and can ignite spontaneously in air, allowing the match to be struck on any rough surface. Potassium chlorate acts as an oxidizing agent, providing oxygen to support combustion, while antimony trisulphide serves as a fuel. However, due to white phosphorus's high toxicity and fire hazard, it was later replaced with safer alternatives like red phosphorus. This combination made early matches extremely dangerous but effective for ignition without a specialized striking surface.