Question:medium
The correct option with order of melting points of the pairs (Mn, Fe), (Tc, Ru) and (Re, Os) is:
The correct option with order of melting points of the pairs (Mn, Fe), (Tc, Ru) and (Re, Os) is:
Show Hint
When comparing the melting points of transition metals, consider factors like atomic number, crystal structure, and bonding strength.
Updated On: Feb 3, 2026
- \( {Fe}<{Mn}, \ {Ru}<{Tc} \ {and} \ {Re}<{Os} \)
- \( {Mn}<{Fe}, \ {Tc}<{Ru} \ {and} \ {Os}<{Re} \)
- \( {Mn}<{Fe}, \ {Tc}<{Ru} \ {and} \ {Re}<{Os} \)
- \( {Fe}<{Mn}, \ {Ru}<{Tc} \ {and} \ {Os}<{Re} \)
Show Solution
The Correct Option is C
Solution and Explanation
- Manganese (Mn) exhibits a lower melting point than Iron (Fe) attributed to its lower atomic number and less stable crystal structure.
- Technetium (Tc) has a lower melting point than Ruthenium (Ru) owing to disparities in atomic structure and bonding.
- Rhenium (Re) has a lower melting point than Osmium (Os) because Os possesses a higher atomic number and exhibits stronger metallic bonding, resulting in a superior melting point. Consequently, the correct ordering is \( {Mn}<{Fe}, \ {Tc}<{Ru} \ {and} \ {Re}<{Os} \).
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