Nursing Elites

1. Which of the following is an example of a decomposition reaction?

• A. 2H2 + O2 → 2H2O
• B. CaCO3 → CaO + CO2
• C. 2Na + Cl2 → 2NaCl
• D. N2 + 3H2 → 2NH3

Correct answer: B

Rationale: A decomposition reaction involves a single compound breaking down into two or more simpler substances. In option B, CaCO3 breaks down into CaO and CO2, making it an example of a decomposition reaction. Options A, C, and D involve different types of chemical reactions such as synthesis, combination, and combustion, respectively. Option A represents a synthesis reaction, where two elements combine to form a compound. Option C demonstrates a combination reaction, where two elements combine to form a compound. Option D is an example of a synthesis reaction, where two reactants combine to form a single compound. It is important to recognize the specific characteristics of each type of chemical reaction to identify the correct example of decomposition reaction, where a compound breaks down into simpler products.

2. A woman wants to stack two bookcases, one 32.75 inches tall and another 17.25 inches tall. How tall will they be when stacked together?

• A. 49.5 inches
• B. 50 inches
• C. 48 inches
• D. 51 inches

Correct answer: B

Rationale: To find the total height of the stacked bookcases, you need to add the heights of the two bookcases: 32.75 inches + 17.25 inches = 50 inches. Therefore, the correct answer is 50 inches. Choice A (49.5 inches) is incorrect as it does not consider rounding off the total height. Choices C (48 inches) and D (51 inches) are incorrect as they do not accurately calculate the sum of the heights of the two bookcases.

3. Which of the following substitutions best captures the meaning of the word 'obsequious' in the sentence: 'The young apprentice was obsequious to his master, always eager to please'?

• A. showing deference
• B. poorly dressed
• C. reserved
• D. aggressive

Correct answer: A

Rationale: The word 'obsequious' means excessively submissive or eager to please, often to the point of showing deference. In this context, 'showing deference' best captures the meaning, indicating respect or submission rather than being poorly dressed, reserved, or aggressive. 'Poorly dressed' (B) is unrelated to the meaning of obsequious. 'Reserved' (C) suggests a different behavior that is opposite to being obsequious. 'Aggressive' (D) is the opposite of obsequious and does not fit the context of the sentence.

4. Why is it not recommended to edit while writing your first draft?

• A. It is considered prewriting.
• B. It wastes effort.
• C. It clouds judgment.
• D. It changes the organization.

Correct answer: B

Rationale: The correct answer is B: 'It wastes effort.' Editing while writing the first draft can be counterproductive as it interrupts the flow of ideas and slows down the writing process. Instead of focusing on perfecting each sentence or paragraph, it is more beneficial to get all ideas down first during the initial drafting phase. Choice A is incorrect as editing is not part of the prewriting stage. Choice C is incorrect because editing may affect the quality of judgment but is not the primary reason to avoid it during the first draft. Choice D is incorrect because changes in organization can be made during the revision stage, not necessarily while writing the initial draft.

5. When the weights of the newborn babies are graphed, the distribution of weights is symmetric with the majority of weights centered around a single peak. Which of the following describes the shape of this distribution?

• A. Uniform
• B. Bimodal
• C. Bell-shaped
• D. Skewed right

Correct answer: C

Rationale: The correct answer is C: Bell-shaped. A symmetric distribution with a single peak is characteristic of a bell-shaped distribution, also known as a normal distribution. This distribution forms a symmetrical, bell-like curve when graphed. Choice A, 'Uniform,' would describe a distribution where all values have equal probability. Choice B, 'Bimodal,' would indicate a distribution with two distinct peaks. Choice D, 'Skewed right,' suggests a distribution where the tail on the right side is longer or more pronounced, unlike the symmetrical bell-shaped distribution described in the question.

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