Answer :
Final answer:
Smokeless powder can cause serious injury if used in a muzzleloader because it burns at a much higher rate than black powder, leading to excessive pressure and potential explosion of the firearm.
Explanation:
The kind of powder that can cause serious injury if used in a muzzleloader is smokeless powder. Muzzleloaders are designed to be used with black powder, which combusts at a different rate than smokeless powder. Smokeless powder burns at a much higher rate, creating excessive pressure that can cause the firearm to explode, leading to severe injury or even death. Using the correct type of powder is crucial for the safe operation of these firearms. Black powder, cordite, and nitrocellulose powder cannot be used interchangeably in muzzleloaders due to their varying combustion properties and pressure characteristics.