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Question: Answered & Verified by Expert
At 518oC, the rate of decomposition of a sample of gaseous acetaldehyde, initially at a pressure of 363Torr was 1.00 Torr s-1 when 5% had reacted and 0.50 Torr s-1 when 33% had reacted. The order of the reaction is:
ChemistryChemical KineticsJEE MainJEE Main 2018 (08 Apr)
Options:
  • A 0
  • B 2
  • C 3
  • D 1
Solution:
1839 Upvotes Verified Answer
The correct answer is: 2

Rateconcentrationn

Let the initial concentration be 1 M.

According to the question,

Concentration  Rate0.95 M10.67 M 0.5

Substituting in the general rate expression,

0.950.67n=10.5

n=2

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