Which one of the following gaints solids have greater melting and boiling points on the basis of type of bonding?
Correct answer: B. Covalent solids
- A. Metallic solids
- B. Covalent solids
- C. Ionic solids
- D. Molecular solids
Explanation
covalent solids,especially those with a a network structure like diamond, are held together by strong covalent bonds between atoms. These bonds are very strong and require a substantial amount of energy to break. Consequently, covalent solids tend to have extremely high melting and boiling points due to the strength of these bonds. An example is diamond, which has a melting point of 3550°C.
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Chemical bonding explains molecular shape through VSEPR theory and distinguishes sigma bonds from pi bonds. Questions involve hybridization, bond angles, dipole moment and bond energy, including how electron-pair repulsion determines geometry and how bond polarity differs from the overall polarity of a molecule.
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