Q.

Burning of coal is represented as  C+O2→CO2. The rate of this reaction is increased by

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a

decrease in the concentration of oxygen

b

powdering the lumps of coal

c

decreasing the temperature of coal

d

providing inert atmosphere

answer is B.

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Detailed Solution

On powdering surface area increases,number of collisions among reacting molecules increases,rate also increases.
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Burning of coal is represented as  C+O2→CO2. The rate of this reaction is increased by