Question

Which of the following has the bonds correctly arranged in order of increasing polarity?

• A. $Be-F,Mg-F,N-F,O-F$
• B. $O-F,N-F,Be-F,Mg-F$
• C. $O-F,Be-F,Mg-F,N-F$
• D. $N-F,Be-F,Mg-F,O-F$

Answer 1

The correct option is B $O-F,N-F,Be-F,Mg-F$

As we know that, the polarity of bond is directly proportional to the electronegativity difference.

Thus greater is the electronegativity difference, greater the polarity of bond.

Hence the correct increasing order of polarity of bonds is-

$O-F,N-F,Be-F,Mg-F$