medium · Enhanced ACT english
Examine this chemistry passage: [1] A catalyst was added to the solution to lower the activation energy of the reaction. [2] As the temperature increased, the rate of molecular collisions escalated rapidly. [3] This accelerated process allowed the researchers to observe the transition state. [4] Ultimately, the desired compound was synthesized in less than half the expected time. The writer wants to add the following sentence: 'They monitored these interactions using a high-speed infrared camera.'
What is the most logical placement for this sentence?
- After Sentence 1, because it describes the monitoring of the catalyst as it entered the chemical solution.
- After Sentence 4, because it concludes the paragraph by explaining how the compound synthesis was verified.
- After Sentence 2, because it identifies how the scientists observed the escalating molecular collisions.
- After Sentence 3, because it provides a detail about the technology used to observe the transition state.
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