What is the molecularity of the reaction in Step II?
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Solution and Explanation
• Molecularity is defined as the number of reacting species (atoms, ions, or molecules) taking part in an elementary reaction which must collide simultaneously in order to bring about a chemical reaction.
• Molecularity is only applicable to individual elementary steps.
Step 1: Analyze the species in Step II
The equation for Step II is: \[ H_2O_2 + IO^- \rightarrow H_2O + I^- + O_2 \]
The reacting species are:
1. One molecule of \( H_2O_2 \)
2. One ion of \( IO^- \)
Step 2: Sum the species
Total number of reacting species \( = 1 + 1 = 2 \).
Therefore, the molecularity of this specific step is 2 (bimolecular). The final answer is 2.
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Reason (R): Two molecules of the reactants are involved in simultaneous collision between them. - Identify the correct statement :
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