QQuestion
The compound that has the highest melting point amongst the following is:
(a) Methane
(b) Sodium chloride
(c) Ammonia
(d) Ethanol
ICSEClass 09ChemistryAtomic Structure and Chemical Bonding01 Mark2026 Easy
✓Answer
(b) Sodium chloride
Explanation –
Sodium chloride (NaCl) is an ionic compound. Ionic compounds have very strong electrostatic forces of attraction between oppositely charged ions, requiring a large amount of energy to break, so they have very high melting points.
Whereas, methane, ammonia and ethanol are covalent compounds with weak intermolecular forces, so they have low melting points.
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