Which one among the following has the <strong>LEAST</strong> coefficient of thermal conductivity?
- A. H_2 ✓
- B. H_2O
- C. Cu
- D. Al
Correct Answer: A. H_2
Explanation
Gases have a significantly lower coefficient of thermal conductivity compared to liquids and solids due to the larger distance between molecules. Therefore, hydrogen gas (H_2) has the least thermal conductivity among the given options.
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