which bond is easily broken

not covalent bonding, not ionic bonding, and therefore it is definately hydrogen bonding which is the weakes bond between molecules.

What are your choices?

hydrogen bonding is the weakest.

When it comes to chemical bonds, there is no definitive answer to say which bond is easily broken. The ease of breaking a bond depends on various factors, such as the type of bond and the specific atoms involved.

In general, ionic bonds are relatively easier to break compared to covalent bonds. Ionic bonds are formed between positively and negatively charged ions and can be broken when the attractions between the opposite charges are overcome. Covalent bonds, on the other hand, involve the sharing of electrons between atoms and are generally stronger and more difficult to break.

However, within covalent bonds, there is variation in the strength and ease of breaking. For example, single covalent bonds are typically weaker than double or triple covalent bonds, and therefore, easier to break. Additionally, the nature of the atoms involved also plays a significant role. For instance, bonds between small atoms with low electronegativity (such as hydrogen) are relatively weaker and easier to break.

To determine the ease of breaking a specific bond, you would need to consider factors like bond type, bond strength, types of atoms involved, and other relevant chemical properties. Experimental data and theoretical calculations can help in predicting and understanding the strength and ease of breaking a particular bond in a given chemical system.