Hydrogen bond is the given to the relatively weak secondry interaction between a hydrogen atom bound to an electronegative atom and another atom which is also generally electronegative and which has one or more lone pairs and can thus acts as a base. We can give the follwoing generalized representation of hydrogen bond.
`overset(delta-)(X)-overset(delta+)(H)...Y`
Bond dissociation energy of H-bond ranges from 8 and 42kJ/ol, and the most commonly encountred hydrogen bonds are `O-H...O, N-H...O and F-H..E`.
Q.Which of the following interaction has energy between 8-42kJ/mol?

Options

A. `Na^(+):C Cl_(4)`
B. `CHCl_(3):Br^(-)`
C. `C_(6)H_(6):C Cl_(4)`
D. `H_(2)O: HCN`

Explanation

To determine which interaction has energy between 8 to 42 kJ/mol, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding the Energy Range**:
- The question specifies that we are looking for interactions with bond dissociation energy between 8 and 42 kJ/mol. This range is typical for hydrogen bonds, which are relatively weak compared to ionic or covalent bonds.

2. **Analyzing Each Option**:
- **Option A: Na⁺ and CCl₄**:
- Na⁺ is a cation, and CCl₄ is a non-polar covalent molecule. The interaction here would be ion-induced dipole attraction, which is a weak force. Therefore, the energy is likely less than 8 kJ/mol.

- **Option B: CHCl₃ and Br⁻**:
- CHCl₃ is a polar covalent molecule, and Br⁻ is an anion. The interaction would be ion-dipole. However, since CHCl₃ has only one hydrogen and three chlorine atoms, the interaction is weaker, likely also less than 8 kJ/mol.

- **Option C: C₆H₆ and CCl₄**:
- Both C₆H₆ (benzene) and CCl₄ are non-polar covalent molecules. The interaction between them is due to London dispersion forces, which are also weak. This interaction would have energy less than 8 kJ/mol.

- **Option D: H₂O and HCN**:
- H₂O is a polar molecule that can form hydrogen bonds, and HCN is also polar with a hydrogen atom bonded to a highly electronegative nitrogen atom. The interaction between H₂O and HCN involves hydrogen bonding, which falls within the specified energy range of 8 to 42 kJ/mol.

3. **Conclusion**:
- After analyzing all the options, the only interaction that has energy between 8 to 42 kJ/mol is **Option D: H₂O and HCN**.

### Final Answer:
The interaction that has energy between 8 to 42 kJ/mol is **D: H₂O and HCN**.

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