Same chapter3 marksDifficulty: Medium
For a first-order reaction, 50% of the reactant is used up in 10 minutes. What fraction remains after 30 minutes?
Chemical Kinetics
3 marksDifficulty: Medium
Distinguish between the order and the molecularity of a reaction.
Original Khojo Papers practice question — not from a past board paper.
Answer
The order is the sum of the powers of the concentration terms in the experimentally determined rate law, and it may be zero, fractional or negative. Molecularity is the number of species that come together in an elementary step, so it is always a small positive integer and is a theoretical concept.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The two are equal only for an elementary reaction.
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Solutions