The rate of reaction when the concentration of each reactant is taken as unity is called ……………… .

Explanation

To solve the question regarding the term used for the rate of reaction when the concentration of each reactant is taken as unity, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Reaction Rate**: The rate of a chemical reaction can be expressed using the rate law, which relates the rate of reaction to the concentration of reactants. The general form of the rate law is:
\[ \text{Rate} = k [A]^n [B]^m \]
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