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What is order of reaction ? Explain....

What is order of reaction ? Explain.

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The sum of the power which the concentration power i.e. concentration term are raised in the rate law equation to express the observation rate of reaction :
`pA + qB+ rC to` Product
Order of reaction i.e. Rate `= -k[A]^p [B]^q [C]^r`
` n = p + q + r`
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