Nursing Elites

1. When magnesium metal reacts with hydrochloric acid, hydrogen gas is produced. What evidence suggests a chemical reaction is occurring?

• A. A change in color
• B. The formation of a gas
• C. Dissolving in a liquid
• D. No change in temperature

Correct answer: B

Rationale: The formation of a gas is evidence of a chemical reaction occurring. In this case, when magnesium metal reacts with hydrochloric acid, hydrogen gas is produced, indicating a chemical change is taking place. The production of gas is a clear indication of a chemical reaction, as new substances are being formed. A change in color might suggest a physical change, dissolving in a liquid could be a physical or chemical change depending on the context, and no change in temperature does not necessarily indicate a chemical reaction, as some reactions are endothermic or release small amounts of heat that may not be easily noticeable.

2. Order the groups from largest to smallest, according to the number of doctors in each group.

• A. Group X, Group Y, Group Z
• B. Group Z, Group Y, Group X
• C. Group Z, Group X, Group Y
• D. Group Y, Group X, Group Z

Correct answer: B

Rationale: The correct order from largest to smallest number of doctors in each group is Group Z (20 doctors), Group Y (15 doctors), and Group X (10 doctors). Therefore, the correct order is Group Z, Group Y, and Group X, which matches option B. Option B is correct because it correctly reflects the descending order of the number of doctors in each group. Options A, C, and D are incorrect as they do not follow the correct order of the number of doctors in each group.

3. Identify the type of sentence: 'The sky is blue, and the grass is green.'

• A. Simple sentence
• B. Compound sentence
• C. Complex sentence
• D. Compound-complex sentence

Correct answer: B

Rationale: The correct answer is B, compound sentence. This sentence consists of two independent clauses ('The sky is blue' and 'the grass is green') that are joined by the coordinating conjunction 'and.' A simple sentence contains a single independent clause. In contrast, a complex sentence has one independent clause and at least one dependent clause. A compound-complex sentence consists of multiple independent clauses and at least one dependent clause, which are not present in the given sentence, making choices A, C, and D incorrect.

4. Identify the participial phrase in the following sentence: 'Running through the park, she spotted a squirrel.'

• A. Running
• B. Through the park
• C. She spotted
• D. A squirrel

Correct answer: B

Rationale: The correct answer is 'B: Through the park.' A participial phrase acts as an adjective and is formed from a verb. In this sentence, 'Running through the park' describes 'she' and functions as an adjective modifying the subject. Choice A 'Running' is incorrect because it is just the present participle without additional context to form a phrase. Choice C 'She spotted' is incorrect as it is a subject and a verb, not a participial phrase. Choice D 'A squirrel' is incorrect as it is a noun phrase, not a participial phrase.

5. Which condition involves an overactive immune system attacking healthy tissues, leading to inflammation and damage?

• A. Immunodeficiency
• B. Autoimmune disease
• C. Allergy
• D. Cancer

Correct answer: B

Rationale: Autoimmune diseases occur when the immune system mistakenly targets and attacks healthy tissues in the body, leading to inflammation and damage. This is different from immunodeficiency, where the immune system is weakened and unable to effectively protect the body against infections. Allergies involve an exaggerated immune response to harmless substances, while cancer is characterized by uncontrolled cell growth. Therefore, the correct answer is autoimmune disease (Choice B) as it specifically describes the scenario of an overactive immune system attacking healthy tissues, distinguishing it from the other conditions listed.

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