At a Guyanese bauxite processing plant, the crushing of bauxite ore into smaller pieces before chemical treatment increases the rate of reaction. This is because crushing:

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Question

At a Guyanese bauxite processing plant, the crushing of bauxite ore into smaller pieces before chemical treatment increases the rate of reaction. This is because crushing:

Accepted Answer

increases the surface area exposed to reactants — Award 1 mark for understanding that smaller particles have greater total surface area, allowing more collisions between reactant particles per unit time. A is incorrect — crushing does not change concentration. C is incorrect — crushing does not significantly raise temperature. D is incorrect — crushing is a physical process, not the addition of a catalyst.

Answer

raises the temperature of the ore

Answer

increases the surface area exposed to reactants

Answer

adds a catalyst to the reaction

Answer

increases the concentration of reactants

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