Answer:
Answers are in the explanation.
Explanation:
Polarity of a bond is due difference in electronegativity of the atoms that are bonding. The highest difference, the most polar bond.
Electronegativities:
O: 3.5
F: 4.0
N: 3.0
Cl: 3.0
I: 2.5
Br: 2.8
H: 2.1
C: 2.5
a)
Difference in electronegativity:
C-O = |2.5 - 3.5| = 1
C-F = 1.5
C-N = 0.5
The ranking is: C-F, C-O, C-N
b)
C-Cl = 0.5
C-I = 0
C-Br = 0.3
Ranking: C-Cl, C-Br, C-I
c)
H-O = 1.4
H-N = 0.9
H-C = 0.4
Ranking: H-C, H-N, H-O
d)
C-H = 0.4
C-C = 0
C-N = 0.5
Ranking: C-N, C-H, C-C