Question : Phosphorus is kept in water because
Option 1: Its ignition temperature is very high.
Option 2: Its ignition temperature is very low.
Option 3: Its critical temperature is high.
Option 4: Its critical temperature is low.
Correct Answer: Its ignition temperature is very low.
Solution : The correct option is Its ignition temperature is very low.
Phosphorus is kept underwater because it is very reactive and, due to its low ignition temperature, spontaneously ignites in the air. The presence of oxygen is reduced by keeping it immersed in water, preventing it from being exposed to air, and lowering the risk of fire.
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