Which of the forces of molecular attraction is the weakest? a double covalent bond b single covalent bond c ionic bond d hydrogen bond?

Option (b) is the correct answer.

Explanation:

A covalent bond is formed by sharing of electrons between the combining atoms. When only one electron is shared between the combining atoms then it is known as a single covalent bond.

On the other hand, sharing of two electrons is known as double covalent bond.

Less energy is required to break a single covalent bond as compared to a double covalent bond, ionic and hydrogen bond.

An ionic bond is formed by transfer of electrons and it occurs between atoms with opposite charges. Therefore, it is a strong bond.

Whereas hydrogen atom attached to another compound will result in the formation of a hydrogen bond.

Thus, we can conclude that in single covalent bond the forces of molecular attraction is the weakest.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.