The rate of reaction can be increased by:

increasing the amount of negative catalyst

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decreasing the surface area exposed to the reactant

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increasing the concentration of the reactant

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decreasing the temperature of the reaction

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Solution

The correct option is C increasing the concentration of the reactant
The rate of reaction increases with increase in the concentration of the reactant, exposed surface area of the reactant, temperature of the reaction and also by increasing the amount of positive catalyst. Negative catayst decreases the rate of reaction.

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= k [N O]^{2} [C l_{2}]

2 N O + C l_{2} \to 2 N O C l

2 N O + C l_{2} \to 2 N O C l

Rate = k [N O]^{2} [C l_{2}]

2 N O + C l_{2} \to 2 N O C l

k [N O]^{2} [C l_{2}]

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