What will be the order of reaction if doubling the concentration of reactant increases the rate by a factor of 4 and tripling the concentration of reactant by a factor of 9?
Correct answer: B. 2
- A. 1
- B. 2
- C. 3
- D. 0
Explanation
The order of a reaction indicates how the rate depends on reactant concentration.If doubling the concentration increases the rate fourfold, and tripling increases it ninefold, the rate depends on the square of the concentration.Hence, the reaction is second order.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Reaction Kinetics
Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
Practise Reaction Kinetics
573 free Reaction Kinetics MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Reaction Kinetics questions
Hydrolysis of ethyl acetate into acetic acid and ethanol in the presence of mineral acid is:
The half-life time for a 1st order decomposition of a substance dissolved in CCl4 is 2.5 hours at 30°C. The amount of substance left after 10 hours if the initial weight of the substance is 160g is
Which method for rate determination is applicable to reactions in solutions, where there are changes in refractive indexes of the substance taking part in the chemical reaction?
The rate law of a reaction is, rate = k[A]2[B]. On doubling the concentration of both A and B, the rate of reaction increases_time.
The rate of a reaction in general can be increased by all the following factors except:
Role of a catalyst in a chemical reaction is to: