Smoke bombs are made with which of the following chemical elements?

Options :
  1. Sulphur
  2. Phosphorus
  3. Hydrogen
  4. Carbon
Answer and Explanation :-

Answer: Option 2


White (or yellow) phosphorus is the most common and most reactive of the 3 allotropic forms of phosphorus. Because of its reactivity, white phosphorus has been used as an incendiary agent by the military or as an igniter for munitions. An incendiary agent is one that is primarily designed to set fires. It commonly is found in hand grenades, mortar and artillery rounds, and smoke bombs.

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