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Question
Which of the following statement is true?
Options
Molecularity of reaction can be zero or a fraction.
Molecularity has no meaning for complex reactions.
Molecularity of a reaction is an experimental quantity.
Reactions with the molecularity three are very rare but are fast.
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Solution
Molecularity has no meaning for complex reactions.
Explanation:
The order of a reaction is an experimental quantity. It can be zero and even a fraction, but molecularity cannot be zero or a non-integer. Order is applicable to elementary as well as complex reactions, whereas molecularity is applicable only for elementary reactions. For complex reaction, molecularity has no meaning.
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