1. Can white phosphorous be used as a fuel?

Answer: No, white phosphorus is not suitable for use as a fuel.
Although it burns easily in air at room temperature (undergoing spontaneous combustion), it is a precarious, toxic, and difficult-to-control substance. These properties make it dangerous and impractical for safe and controlled use as a fuel.

2. Can you tell why nylon fabric cannot be used for making a firefighter’s uniform?

Answer: Nylon fabric is not suitable for making a firefighter’s uniform because it is a synthetic fibre that melts easily when exposed to high heat. If a firefighter wearing nylon clothing comes near a fire, the fabric can melt and stick to the skin, causing severe burns. Firefighters’ uniforms are made from special fire-resistant materials that do not melt or catch fire easily.

3. Which out of the two, dry wood or wet wood, will catch fire easily and why?

Answer: Dry wood will catch fire more easily than wet wood.
This is because dry wood has a lower ignition temperature and no moisture to absorb heat. Wet wood contains water, which must first be evaporated by heat before the wood can reach its ignition temperature, making it harder to ignite.