Question

Assertion (A): HF is more polar than HCl.

Reason (R): More the electronegativity difference between two atoms, the more is the polar nature.

Options

• If both A and R are true, and R is the correct explanation of A.

• If both A and R are true, but R is not the correct explanation of A.

• If A is true, but R is false.

• If both A and R are false.

Answer 1

If both A and R are true, and R is the correct explanation of A.

Explanation:

Fluorine has a much higher electronegativity than chlorine, creating a larger electronegativity difference between the atoms in HF compared to HCl. This greater difference causes a stronger pull on the shared electron pair toward the fluorine atom, resulting in a larger partial charge separation. Therefore, HF has a significantly higher dipole moment and is more polar than HCl.