The decreasing order of dipole moments of the molecules `HF,H_(2)O,BeF_(2),NF_(3)` is

Options

A. `HFgtH_(2)OgtBeF_(2)gtNF_(3)`
B. `H_(2)OgtHFgtNF_(3)gtBeF_(2)`
C. `BeF_(2)gtNF_(3)gtHFgtH_(2)O`
D. `NF_(3)gtBeF_(2)gtH_(2)OgtHF`

Explanation

To determine the decreasing order of dipole moments of the molecules HF, H₂O, BeF₂, and NF₃, we will analyze each molecule based on the electronegativity differences and molecular geometry.

### Step 1: Understand the concept of dipole moment
The dipole moment (μ) is a measure of the polarity of a molecule. It is calculated as the product of the charge difference (Δq) and the distance (d) between the charges:
\[ \mu = \Delta q \cdot d \]
A higher electronegativity difference between bonded atoms typically results in a higher dipole moment.

### Step 2: Analyze HF (Hydrogen Fluoride)
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