Question

Which of the following compounds contain(s) no covalent bond(s)? $\mathrm{KCl},{\mathrm{PH}}_3,{\mathrm{O}}_2,{\mathrm{B}}_2{\mathrm{H}}_6,{\mathrm{H}}_2{\mathrm{SO}}_4$

Answer 1

1. Covalent bond is the bond formed by the sharing of electrons between the atoms.
2. $\mathrm{KCl}$ is an ionic compound that can be dissociated in the constituent ions.
3. ${\mathrm{PH}}_3$ is a covalent compound with the covalent bond between P and H atoms.
4. ${\mathrm{O}}_2$ contains a covalent bond between oxygen atoms.
5. ${\mathrm{B}}_2{\mathrm{H}}_6$shares a covalent bond between boron and hydrogen atom.
6. ${\mathrm{H}}_2{\mathrm{SO}}_4$ contains two covalent bonds between sulphur and oxygen atom and oxygen and a hydrogen atom.
7. Hence $\mathrm{KCl}$ is the only compound with no covalent bond.