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NEETChemistryChemical Kinetics

What is the mathematical expression that represents the rate of the reaction in first class of reactions?

Options

  1. A-d[R]/dt = k[R]
  2. Bd[R]/dt = k[R]
  3. C[dR/dt] = k
  4. D[dR/dt] = -k

Correct answer

A. -d[R]/dt = k[R]

Step-by-step solution

The rate of the reaction is proportional to the first power of the concentration of the reactant R, which is mathematically represented as -d[R]/dt = k[R].

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