Question

Which one of the following is not a strong bond?
A.Vander Waals bond
B.Metallic bond
C.Covalent bond
D.Ionic bond

Answer 1

Hint: A covalent bond is formed by the sharing of electrons between two or more atoms, an ionic bond involves the complete transfer of electrons from one element to another, metallic bonds are formed due to the presence of unpaired electrons and Vander Waals bonds are short distance attractions.

Complete answer:
A bond is formed between two or more atoms when there is some sort of attraction that keeps them stuck at their positions. It was assumed earlier that chemical bonds are only formed to attain a noble gas configuration but the formation of xenon fluorides and oxides proved this assumption wrong.
The strength of a bond is dependent on the kind of attraction that is involved in the bond formation. Ions are formed when there is a give and take of electrons and therefore ionic bonds are extremely strong bonds involving strong electrostatic forces of attraction.
Covalent bonds are formed by bringing atoms close enough to allow the overlapping of their orbitals; a shared pair of electrons lies in between the nuclei of these atoms.
Metallic bonds are present in metal kernels where metal atoms are bonded to other atoms of their own kind and the strength of these bonds enhances with the number of unpaired electrons present in the.
Vander Waals bonds are feeble short range interactions that are only present due to the momentary polarization effect observed in molecules. It is only the polarity of molecules that gives birth to these weak forces that can be very easily broken apart.
Hence, Vander Waals bonds are not a strong bond and the correct option is (A).

Note:
Covalent and ionic bonds result in the formation of chemical compounds that cannot be easily separated into their constituent elements but metallic bonds and Vander Waals bonds never result in the formation of compounds.