Material hardness (Mohs) — arrange from softer to harder: (a) Gold (b) Silver (c) Platinum (d) Diamond
Verbal Reasoning
Logical Sequence of Words
Difficulty: Medium
Choose an option
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A(d), (a), (b), (c)
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B(c), (d), (a), (b)
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C(b), (a), (c), (d)
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D(a), (b), (c), (d)
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E(b), (c), (a), (d)
Answer
Correct Answer: (b), (a), (c), (d)
Explanation
Introduction / Context:Order common precious materials by increasing hardness on the Mohs scale (approximate classroom values).
Given Data / Assumptions:
- Gold ≈ 2.5–3, Silver ≈ 2.5–3, Platinum ≈ 4–4.5, Diamond = 10.
- Where two share similar hardness (silver/gold), either may precede the other; we choose Silver then Gold.
Concept / Approach:Rank by Mohs hardness from softer (lower) to harder (higher).
Step-by-Step Solution:Silver (b) ~2.5–3.Gold (a) ~2.5–3.Platinum (c) ~4–4.5.Diamond (d) 10.
Verification / Alternative check:Reference tables list diamond as the hardest; platinum harder than gold/silver.
Why Other Options Are Wrong:They place diamond before softer metals or mix softer metals after platinum.
Common Pitfalls:Confusing value with hardness; diamond’s price and hardness are separate properties.
Final Answer:(b), (a), (c), (d)