Odd man out...Gold, Silver, Mercury, Iron.

Appeared in: MNS 2015

Explanation

This is a general intelligence question that tests the ability to classify items based on their physical properties.
The common characteristic among three of the four options is their physical state at room temperature.
Gold, Silver, and Iron are all solid metals under standard conditions.
Mercury is the outlier because it is the only metal that exists in a liquid state at room temperature.

Option B: Gold is a solid metal at room temperature, similar to Silver and Iron. Therefore, it fits within the group of solid metals and is not the odd one out.
Option C: Silver is a solid metal at room temperature, just like Gold and Iron. It shares this common property and is not the outlier.
Option D: Iron is a solid metal at room temperature, fitting the pattern established by Gold and Silver. It is not the odd one out.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Identifying an item that does not share a common property with others in a group (Odd Man Out) as background academic context rather than a clinical decision trigger.
Historically, mercury was essential in nursing for measuring vital signs using mercury-in-glass thermometers and sphygmomanometers.
Due to the health risks associated with mercury exposure (neurotoxicity and kidney damage), healthcare facilities have transitioned to mercury-free devices. This is a key patient and healthcare worker safety initiative.
Nurses must be aware of proper procedures for handling and disposing of legacy mercury devices to prevent environmental contamination and toxic exposure.

How to Approach the Question

First, identify the type of question. This is an 'Odd Man Out' or classification question.
Analyze all the given options: Gold, Silver, Mercury, and Iron.
Determine the common property or relationship that connects most of the options. In this case, all are metals.
Look for a differentiating property. Consider their physical state, color, reactivity, or use.
Notice that Gold, Silver, and Iron are all solids at room temperature.
Identify the option that does not share this common property. Mercury is a liquid at room temperature, making it the 'odd one out'.

Concept Tested & Keywords

Concept Tested: Identifying an item that does not share a common property with others in a group (Odd Man Out).
Stem keywords: Odd man out, Gold, Silver, Mercury, Iron
Lead-in keywords: Odd man out
Negative lead-in flag: false

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E6 Pharmacology Katzung 16e p. 1597-1599

Practise the full MNS 2015

Attempt every question from this paper in a timed mock, then review the full solution for each one.