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Reaction Kinetics /
Quiz 2

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NCAT - Practice Test - Chemistry - Reaction Kinetics Quiz

Attempt 10 MCQs on NCAT - Practice Test - Chemistry - Reaction Kinetics | Quiz 2

11. How does increasing reactant concentration affect reaction rate?

Increases
Decreases
No effect
First increases then decreases

12. What is the effect of increasing temperature on reaction rate?

Increases
Decreases
No effect
Reaction stops

13. How does a catalyst speed up a reaction?

Lowers activation energy
Increases activation energy
Increases temperature
Increases concentration

14. How does grinding a solid reactant affect reaction rate?

Increases rate
Decreases rate
No effect
Stops reaction

15. Which type of reaction is typically faster?

Ionic reactions are faster
Covalent reactions are faster
Both are equally fast
Depends on temperature

16. How does increasing pressure affect gas-phase reaction rates?

Increases rate
Decreases rate
No effect
Only for solids

17. Which type of reaction is initiated by light?

Photochemical reactions
Thermal reactions
Electrochemical reactions
Nuclear reactions

18. What approximate change in rate occurs for a 10°C temperature increase?

Doubles
Halves
Quadruples
Remains same

19. What is the Arrhenius equation?

k = A e^{-Ea/(RT)}
k = A e^{Ea/(RT)}
k = A e^{-RT/Ea}
k = A e^{RT/Ea}

20. What is the term for a substance that decreases reaction rate?

Positive catalyst
Negative catalyst
Promoter
Poison

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Instructions: Select one answer per question. After submitting, you will see your score, correct answers, and explanations.

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