Question

Which is the strongest bond among the following?
A. Ionic bond
B. Covalent $\sigma$ bond
C. Coordinate bond
D. Covalent $\pi$-bond

Answer 1

The chemical bond is the link joining the two atoms which results in the formation of chemical compounds. The strongest bond is formed by the sharing of electrons between the two atoms.

Complete answer:
The chemical bonding is referred to as the formation of chemical bonds between the two atoms which forms a chemical compound. The chemical bonds keep the atom together in a compound.
Ionic bonds are formed by the transfer of electrons from one atom to the other atom. In this one atom loses electrons and other atoms gain electrons. Due to the transfer of electrons negative charge anion and positive charge cation is formed.
Coordinate bond is a referred as the alternate covalent bond which is formed when the electron pair is shared by a single atom.
Covalent bonds are defined as the bonds which are formed by the sharing of electrons. The compound containing carbon usually shows covalent bonding.
The covalent bonding is of two types:
1. Covalent $\sigma$bond: The sigma bond is formed by the end to end overlap of two orbitals which can be two s-orbital, two p-orbital or one s or one p orbital.
2. Covalent $\pi$-bond: The pi bond is formed by the side to side overlap of the two parallel p orbitals.
The covalent $\sigma$ -bond is much stronger than the covalent $\pi$-bond because in sigma bond the orbitals are placed along the internuclear axis which results in more effective overlap as compared to the pi bond where the orbital are perpendicular to the internuclear axis.
Thus, covalent $\sigma$ bond is the strongest bond among the following.
Therefore, the correct option is B.

Note:
Don’t get confused over Covalent $\sigma$ bond and Covalent $\pi$-bond as both come under covalent bond. When one sigma bond is present between two atoms, a single bond is formed when one sigma and one pi bond is formed then a double bond is formed, when one sigma and two pi bonds are formed then a triple bond is formed.