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Combustion is the process in which

  • A.No heat is produced
  • B.No light is produced
  • C.Only heat is produced
  • D.Heat and light are produced

Answer: D

Combustion produces both heat and light. It is the rapid reaction of a substance with oxygen, releasing energy fast enough for the gases to glow.

Rusting is also an oxidation but is far too slow to produce a flame, so it gives out heat without light.

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