The relative strength of intermolecular forces in bond decreasing order is –

Options

A. H- bond ` gt ` Covalent bond ` gt ` dipole - dipole
B. Covalent bond ` gt ` dipole - dipole ` gt ` H - bond
C. Covalent bond ` gt ` H - bond ` gt ` dipole - dipole
D. Dipole - dipole ` gt ` H - bond ` gt ` Covalent bond

Explanation

To determine the relative strength of intermolecular forces in decreasing order, we need to analyze the different types of bonds and forces involved.

### Step-by-Step Solution:

1. **Identify the Types of Bonds/Forces**:
- The main types of bonds/forces we will consider are:
- Covalent Bonds
- Hydrogen Bonds
- Dipole-Dipole Interactions

2. **Understand Covalent Bonds**:
- Covalent bonds are formed by the sharing of electrons between atoms. This sharing leads to a strong bond due to the overlap of atomic orbitals.
- Covalent bonds are the strongest of the three types mentioned.

3. **Understand Hydrogen Bonds**:
- Hydrogen bonds occur when a hydrogen atom covalently bonded to a highly electronegative atom (like oxygen or nitrogen) interacts with another electronegative atom.
- Although hydrogen bonds are relatively strong compared to other intermolecular forces, they are weaker than covalent bonds.

4. **Understand Dipole-Dipole Interactions**:
- Dipole-dipole interactions occur between the positive end of one polar molecule and the negative end of another polar molecule.
- These interactions are generally weaker than both covalent and hydrogen bonds.

5. **Rank the Strengths**:
- Based on the above analysis, we can rank the strengths of these bonds/forces in decreasing order:
1. **Covalent Bond** (strongest)
2. **Hydrogen Bond**
3. **Dipole-Dipole Interaction** (weakest)

### Final Answer:
The relative strength of intermolecular forces in decreasing order is:
**Covalent Bond > Hydrogen Bond > Dipole-Dipole Interaction**