In which of these pairs of atoms would the bond be the least polar (i.e., lowest percent ionic character)?

BF₃

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H₂O

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H₂S

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HCl

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Solution

The correct option is A
BF₃

The bond dipole of three B - F bonds give a net sum of zero because resultant of any two dipoles's equal & opposite to dipole of third bond.

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Similar questions

A polar covalent bond will be formed in which one of these pair of atoms:

The bonds between P atoms and Cl atoms in $P C l_{5}$ are likely to be

A B

(X_{A} - X_{B})

C H X_{3}

20 %

C H X_{3}

∠ H C X = ∠ X C X = 109^{\circ} 28^{^{'}}

C H X_{3}

c o s (180 - 109^{\circ} 28^{^{'}}) = \frac{1}{3}

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