Chemistry, 24.03.2020 01:16 krislinsanchez5221

Which choice(s) correctly rank(s) the bonds in terms of increasing polarity?

I. Cl?F < Br?Cl < Cl?Cl II. H?C < H?N < H?O

III. Br?F < I?F < Cl?F IV. Si?Cl < Si?P < Si?C < Si?F

I, II only
II only
II, IV only
I, III, IV only
I only

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Answer from: pooooooooyp4286

(II) only correctly rank the bonds in terms of increasing polarity.

Explanation:

Bond polarity is proportional to difference in electronegativity between bonded atoms.

Atoms Electronegativity Bond Electronegativity difference

Cl 3.0 Cl-F 1.0

Br 2.8 Br-Cl 0.2

F 4.0 Cl-Cl 0

H 2.1 H-C 0.4

C 2.5 H-N 0.9

N 3.0 H-O 1.4

O 3.5 Br-F 1.2

I 2.7 I-F 1.3

Si 1.9 Cl-F 1.0

P 2.2 Si-Cl 1.1

Si-P 0.3

Si-C 0.6

Si-F 2.1

So, clearly, order of increasing polarity : O-H > N-H > C-H

So, (II) only correctly rank the bonds in terms of increasing polarity

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Answer from: Quest

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Which choice(s) correctly rank(s) the bonds in terms of increasing polarity?

I. Cl?F <...

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