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Question
Select the correct descending order of melting points of ionic, non-polar covalent and polar covalent compounds.
Select the correct descending order of melting points of ionic, non-polar covalent and polar covalent compounds.
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Solution
The correct option is D Ionic > polar covalent > non-polar covalent
∙ An ionic bond is formed due to the attraction between cation and anion. These ions are held together by strong electrostatic forces of attraction.
∙ The atoms forming a polar covalent compounds have partial negative and positive charges on them.
∙ Non-polar molecules have weak van der walls force of attraction.
∙ Order of strength of intermolecular forces: ionic > polar covalent > non-polar
∙ Greater the intermolecular forces, greater is the amount of energy (temperature) required to break the molecules apart.
∙ Therefore, the melting points of these compounds follow the order: ionic > polar covalent > non-polar covalent.
∙ An ionic bond is formed due to the attraction between cation and anion. These ions are held together by strong electrostatic forces of attraction.
∙ The atoms forming a polar covalent compounds have partial negative and positive charges on them.
∙ Non-polar molecules have weak van der walls force of attraction.
∙ Order of strength of intermolecular forces: ionic > polar covalent > non-polar
∙ Greater the intermolecular forces, greater is the amount of energy (temperature) required to break the molecules apart.
∙ Therefore, the melting points of these compounds follow the order: ionic > polar covalent > non-polar covalent.
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