Question map
As compared to covalent compounds, electrovalent compounds, generally have
Explanation
Electrovalent (ionic) compounds generally possess high melting and boiling points compared to covalent compounds. This difference arises from the nature of their chemical bonding. Ionic compounds consist of a rigid crystal lattice held together by strong electrostatic forces of attraction between oppositely charged ions [t1, t3, t5]. Breaking these strong ionic bonds requires a significant amount of thermal energy [t2, t4]. In contrast, covalent compounds (specifically discrete molecular ones) are held together by relatively weak intermolecular forces, such as van der Waals forces, which are easily overcome at lower temperatures [c1, c2, t3]. While the covalent bonds within a molecule are strong, the forces between molecules are weak, leading to lower melting and boiling points [c2, t2]. Consequently, ionic compounds are typically solids at room temperature with high thermal stability [t6, t7].
Sources
- [1] Science , class X (NCERT 2025 ed.) > Chapter 4: Carbon and its Compounds > 4.1 BONDING IN CARBON – THE COVALENT BOND > p. 59
- [2] Science , class X (NCERT 2025 ed.) > Chapter 4: Carbon and its Compounds > 4.1 BONDING IN CARBON – THE COVALENT BOND > p. 60
- [3] https://www.sciencedirect.com/topics/chemistry/ionic-bonding