Question

Which factor explains why coal dust in an enclosed space is more explosive than coal dust blown outdoors into an open space ? A.Temperature.
B.surface area
C.concentration
D.Volume
E.catalyst

Answer 1

The correct option is B.

Coal dust refers to the powered form of coal. Because of the high surface area of coal dust it is highly prone to dust explosion, which involves rapid combustion of fine particles that are suspended in the air; this usually occur in an enclosed place. Coal dust in an enclosed place is more explosive than coal dust that is blown outdoor in an open space because the coal dust in an enclosed place is more concentrated due to restricted space, thus it is more liable to explosion.

Answer 2

C.concentration.much more explosive in a contained area.