Question:
The compound that has the highest melting point amongst the following is:
The compound that has the highest melting point amongst the following is:
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The melting point of (NaCl) is approximately 801°C, whereas Methane melts at -182°C. That is a massive difference!
Updated On: Mar 12, 2026
- Methane
- Sodium chloride
- Ammonia
- Ethanol
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The Correct Option is B
Solution and Explanation
Step 1: Comparing Bond Types:
The melting point of a substance depends on the strength of the forces holding its particles together.
Step 2: Analyzing the Options:
Methane, Ammonia, Ethanol: These are Covalent compounds. They have weak intermolecular forces (Van der Waals or Hydrogen bonding). They are usually gases or liquids at room temperature with very low melting points. Sodium Chloride ((NaCl)): This is an Ionic compound. It forms a giant 3D crystal lattice held together by strong electrostatic forces of attraction between oppositely charged ions.
Step 3: Comparing Strengths:
The energy required to break ionic bonds is significantly higher than that required to overcome intermolecular forces in covalent molecules.
Step 4: Final Answer:
Sodium chloride has the highest melting point.
The melting point of a substance depends on the strength of the forces holding its particles together.
Step 2: Analyzing the Options:
Methane, Ammonia, Ethanol: These are Covalent compounds. They have weak intermolecular forces (Van der Waals or Hydrogen bonding). They are usually gases or liquids at room temperature with very low melting points. Sodium Chloride ((NaCl)): This is an Ionic compound. It forms a giant 3D crystal lattice held together by strong electrostatic forces of attraction between oppositely charged ions.
Step 3: Comparing Strengths:
The energy required to break ionic bonds is significantly higher than that required to overcome intermolecular forces in covalent molecules.
Step 4: Final Answer:
Sodium chloride has the highest melting point.
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