A) F?F
B) 0?F
C) N?F
D) C?F
Correct Answer: D
Solution :
More the difference between electronegativities of two atoms, more will be the polarity of covalent bond. On moving along a period from left to right electronegativity decreases, thus the order of electronegativities of given elements is \[\underset{\left( 2.5 \right)}{\mathop{C}}\,\,\,\,<\,\,\,\underset{\left( 3.0 \right)}{\mathop{N}}\,\,\,\,<\,\,\,\underset{\left( 3.5 \right)}{\mathop{O}}\,\,\,\,<\,\,\,\underset{\left( 4.0 \right)}{\mathop{F}}\,\] Thus, C?F bond has the maximum polarity.
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