The rate of a chemical reaction is typically dependent on the concentration of the reactants. At the beginning of a reaction, the concentrations of reactants are at their highest. As the reaction proceeds, the reactants are consumed, and their concentrations decrease. Consequently, the reaction rate, which is proportional to the reactant concentrations (for most reactions), generally decreases over time.
Chemical reaction rate generally _______.
Asked in MPSC CS Prelims 2021 · Topic: Physical and Chemical Changes, Solution (Definition and Characteristics of Chemical Changes (Chemical Reactions))
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Answer: C. are greater at the beginning of a reaction and decrease with time
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