Question

Hydrogen Bond energy is equal to
(A) $3 - 7 cals$
(B) $30 - 70 cals$
(C) $3 - 10 kcals$
(D) $30 - 70 kcals$

Answer 1

Hint: The shape, surroundings, and nature of the particular donor and acceptor atoms all affect the energy of a hydrogen bond. They are therefore weaker than fully covalent or ionic connections and slightly stronger than a van der Waals contact.
Complete step by step solution:
As above we know some details about Hydrogen bond energy. Now, we just know about some uses of Hydrogen bond energy,
Both inorganic substances like water and organic ones like DNA and proteins, this kind of link can be found. Paper and felted wool, as well as the adhesion of separate sheets of paper after being wet and later drying, are both held together by hydrogen bonds.
As we know, the hydrogen bond free energy content ranges from 1 to 5 kcal/mol, depending on shape and surroundings. This renders it weaker than covalent or ionic bonds but stronger than a van der Waals interaction.
Therefore, the correct answer is $3 - 10 kcals$ .

Additional Information: Fluorine (F) is the most electronegative element having a value of electronegativity of 3.98. The hydrogen bond is strongest in Fluorine.

Hence, the correct option is C

Note: Now we just know about some importance of Hydrogen bond energy, numerous anomalous physical and chemical characteristics of compounds of N, O, and F are caused by the hydrogen bond. The high boiling point of water (100 °C) compared to the other group-16 hydrides that have far weaker hydrogen bonds is specifically brought on by intermolecular hydrogen bonding.