Question 36

Hydrogen bonds hold molecules of water together with other water molecules.

Water molecules are held together by hydrogen bonds, which are weak attractions that occur between the hydrogen atom of one water molecule and the oxygen atom of another.

A) Ionic

Ionic bonds are formed through the transfer of electrons between atoms, resulting in the attraction between positively and negatively charged ions. This type of bond does not occur between water molecules, making this option incorrect in the context of water interactions.

B) Covalent

Covalent bonds involve the sharing of electron pairs between atoms, such as those present within a single water molecule (between hydrogen and oxygen). However, this does not describe how water molecules interact with each other, thus this option is also incorrect.

C) Hydrogen

Hydrogen bonds are the correct type of bond that holds water molecules together. These bonds occur due to the polar nature of water, where the positive hydrogen end of one molecule is attracted to the negative oxygen end of another, facilitating cohesion among water molecules.

D) Molecular

The term "molecular" does not specify a type of bond but rather refers to the structure formed by molecules. While water is indeed a molecular compound, this option does not accurately describe the specific interaction between water molecules, rendering it incorrect.

Conclusion

Hydrogen bonds are essential for the cohesion of water molecules, enabling properties such as surface tension and the unique behaviors of water in various states. Options A, B, and D fail to accurately describe the nature of the interactions between water molecules, confirming that C is the definitive answer.