Chapter 8, Problem 43A

Interpretation Introduction

Interpretation: The correct option/s that generally applies to molecular compounds needs to be identified.

Concept Introduction: Ionic bonds are formed by the complete transfer of electron/s from a more electronegative atom to a less electronegative atom. The interaction between positive and negative charge is strong thus, ionic bonds are strong.

Explanation of Solution

Reason for correct option/s:

Molecular compounds are formed by sharing of electron pair/s between atoms. On the other hand, ionic compounds are formed by the complete transfer of electron/s between two atoms. The ionic bonds are thus stronger than molecular bonds thus, they are generally gases or liquids. Thus, option (b) is applied to molecular compounds.

The molecular compounds have weak intermolecular attractions as compared to ionic compounds thus, they have low melting points. Thus, option (c) is applied to molecular compounds.

In molecular compounds, atoms are bonded together with covalent bonds. These bonds are formed by sharing of electron pairs between two atoms. Thus, option (e) is applied to molecular compounds.

Conclusion

Reason for incorrect option/s:

Molecular compounds are formed from one type of element. They are composed of non-metals by sharing electrons between the atoms. The ionic compounds contain metals and non-metals. Here, ionic bonds are formed by the complete transfer of electrons from a metal to a non-metal. Thus, option (a) is not applied to molecular compounds.

Ionic compounds contain ionic bonds, not molecular compounds; thus, option (d) is not applied to molecular compounds.