MCQ
Which is the correct increasing order of electronegativity of halides?
- A$\text{F, Cl, Br, I}$
- ✓$\text{I, Br, Cl, F}$
- C$\text{Br, Cl, F, I}$
- D$\text{Cl, Br, I, F}$
✓
Answer
Correct option: B.
$\text{I, Br, Cl, F}$
The bond between carbon and the halogen atom $(C-X)$ is polar. Since halogen atoms are more electronegative than carbon, there is partial negative charge on halogen atom and positive charge on carbon.
This makes the molecule dipolar and polar nature of $C-X$ bond is increase with increase in the electronegativity difference between carbon and halogen atom.
Hence the order of polarity of $C−X$ bond is $\text{C−F>C−Cl>C−Br>>C−I.}$
This makes the molecule dipolar and polar nature of $C-X$ bond is increase with increase in the electronegativity difference between carbon and halogen atom.
Hence the order of polarity of $C−X$ bond is $\text{C−F>C−Cl>C−Br>>C−I.}$
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