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In the reaction ArarrB , if the change ...

In the reaction `ArarrB` , if the change in concentration of A in the time interval `Deltat " is " Delta[A]` , then the rate of reaction is `-(Delta[A])/(Deltat)` . What is the significance of the 'negative ' sign in the expression `-(Delta[A])/(Deltat)` ?

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CHHAYA PUBLICATION-CHEMICAL KINETICS-WARM UP EXERCISE
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