Question

Rate law of a complex reaction can be determined by

• A. Only experimental method
• B. Only theoretical method
• C. Both experimental and theoritical method
• D. None of the above

Answer 1

The correct option is A Only experimental method

For irreversible reaction, rate of reaction only depends on the concentration of reactants only. Generally they do not depend on product concentration.
Thus, the rate of reactioon is proportional to concentratiom of reactants.
The representation of rate of reaction in terms of the concentration of the reactants is called rate law.
For a complex reaction, rate law can only be established ​by experiments​ and may differ for the same reaction at different conditions.

Hence, option (a) is correct.