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30-12-2015
Chemistry

contestada

The chemical bond between which two atoms is most polar?
(1) C–N (3) S–Cl
(2) H–H (4) Si–O

Respuesta :

30-12-2015

(4) Si-O is the most polar, since their differences in electronegativity is the highest.

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06-07-2018

Correct Answer: option 4: Si-O

Reason:
The bond polarity depends on the electronegativity difference between constituent atoms. Greater the electronegativity difference, polar is the bond. In present case, electronegativity of Si and O is 1.9 and 3.44 respectively. Hence, electronegativity difference is 1.54, which is greater as compared to other bonds on present interest. Hence, Si-O bond is considered to be more polar.

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