Nursing Elites

1. In an oxidation reaction,

• A. an oxidizing agent gains electrons.
• B. an oxidizing agent loses electrons.
• C. a reducing agent gains electrons.
• D. a reducing agent loses electrons.

Correct answer: B

Rationale: In an oxidation reaction, the substance being oxidized loses electrons, not gains them. An oxidizing agent is responsible for causing oxidation in another substance by accepting electrons, hence it undergoes reduction and loses electrons. Therefore, the correct statement is 'an oxidizing agent loses electrons,' making choice B the correct answer. Choices A, C, and D are incorrect because in an oxidation reaction, the oxidizing agent does not gain electrons, a reducing agent does not gain electrons, and a reducing agent does not lose electrons.

2. Select the context clue from the following sentence that helps you define the word 'emulate': Felicia always tried to emulate her big sister, so she would often imitate the way she spoke, moved, and dressed.

• A. tried
• B. often
• C. imitate
• D. way

Correct answer: C

Rationale: The correct answer is 'C: imitate.' In the sentence, it is explicitly stated that Felicia would often imitate her big sister, which directly relates to the meaning of 'emulate' as to copy or imitate someone else. 'Tried' (choice A) does not provide a direct connection to the definition of 'emulate.' 'Often' (choice B) and 'way' (choice D) are not directly associated with the act of imitating or copying, making them less relevant context clues for defining 'emulate.'

3. Balance the following redox reaction in acidic solution: I⁻ (aq) + Cr₂O₇²⁻ (aq) -> I₂ (aq) + Cr³⁺ (aq). Identify the oxidizing agent and reducing agent.

• A. I⁻ is oxidized, Cr₂O₇²⁻ is reduced
• B. I⁻ is reduced, Cr₂O₇²⁻ is oxidized
• C. Both I⁻ and Cr₂O₇²⁻ are oxidized
• D. Both I⁻ and Cr₂O₇²⁻ are reduced

Correct answer: B

Rationale: In the given redox reaction, I⁻ is gaining electrons to form I₂, which means I⁻ is being reduced (undergoing reduction). On the other hand, Cr₂O₇²⁻ is losing electrons to form Cr³⁺, indicating that Cr₂O₇²⁻ is being oxidized (undergoing oxidation). Therefore, I⁻ is the reducing agent and Cr₂O₇²⁻ is the oxidizing agent. Choice A is incorrect because I⁻ is being reduced, not oxidized. Choice C is incorrect as both species cannot be oxidized in the same reaction. Choice D is incorrect as both species cannot be reduced in the same reaction.

4. Which sentence correctly answers the question: What were you doing when the thunderstorm started?

• A. I mowed the lawn.
• B. I am mowing the lawn.
• C. I was mowing the lawn.
• D. I have mowed the lawn.

Correct answer: C

Rationale: The correct answer is 'C: I was mowing the lawn.' This sentence correctly uses the past continuous tense to indicate an action that was in progress at a specific time in the past when the thunderstorm started. Choice A 'I mowed the lawn' is in simple past tense, not past continuous, and does not convey the ongoing nature of the action. Choice B 'I am mowing the lawn' is in present continuous tense, not past continuous, and does not match the past timeframe. Choice D 'I have mowed the lawn' is in present perfect tense, not past continuous, and does not convey the ongoing action at a specific past time.

5. What is the purpose of the italicized text in the passage?

• A. To show Madame Butterfly's title
• B. To emphasize an idea
• C. To format a heading
• D. To indicate the title of the opera

Correct answer: D

Rationale: The purpose of the italicized text is to indicate the title of the opera, Madame Butterfly. In the text, 'Madame Butterfly' is italicized to highlight that it refers to the title of the opera written by Giacomo Puccini. It does not serve to show Madame Butterfly's thoughts (choice A), emphasize an idea (choice B), or format a heading (choice C). The italicization is specifically used to identify the title of the opera within the passage.

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