The reason for the melting point of chalk to be greater than the melting point of motor oil which has higher melting point than water needs to be explained. Concept introduction: The electrostatic attraction between ionic compounds results in the formation of ionic bonds which are stronger than covalent bonds due to the ionic interaction. For example, NaCl, KCl, etc. Covalent bonds are formed by mutual sharing of electrons between the atoms and form bonds which are not stronger than the ionic bonds. For example, O 2 , H 2 , hydrocarbons, etc. A hydrogen bond is formed between a hydrogen atom which is bonded to an electronegative atom with the other electronegative atom present in the same molecule or different molecule present in its vicinity.

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Chapter 16, Problem 14E

Interpretation Introduction

Interpretation: The reason for the melting point of chalk to be greater than the melting point of motor oil which has higher melting point than water needs to be explained.

Concept introduction:

The electrostatic attraction between ionic compounds results in the formation of ionic bonds which are stronger than covalent bonds due to the ionic interaction. For example, NaCl, KCl, etc.

Covalent bonds are formed by mutual sharing of electrons between the atoms and form bonds which are not stronger than the ionic bonds. For example, O₂, H₂, hydrocarbons, etc.

A hydrogen bond is formed between a hydrogen atom which is bonded to an electronegative atom with the other electronegative atom present in the same molecule or different molecule present in its vicinity.

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