Which of the following statements about the molecularity of an elementary reaction is FALSE?
Answer and explanation
Correct answer: B. Molecularity can be zero
- Step 1: Molecularity is defined as the number of reacting species (atoms, ions or molecules) taking part in an elementary reaction to form products.
- Step 2: Since at least one species must collide for a reaction to occur, molecularity cannot be zero or fractional.
- Step 3: Therefore, the claim that molecularity can be zero is false.
Answer
Molecularity can be zero.
Why not the others: Molecularity is always an integer is a true property; Molecularity cannot exceed three due to vanishingly small probability of simultaneous 4-body collision; Molecularity is derived from the reaction mechanism is true by definition.
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