Fill in each blank with either "polar" or "nonpolar":In O3, the O-O bonds are ____________ covalent bonds, and the whole molecule is _________________ .Fill in each blank with either "polar" or "nonpolar":In PBr3, the P-Br bods are ______________ covalent bonds, and the whole molecule is _______________.

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Asked May 13, 2019
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Fill in each blank with either "polar" or "nonpolar":

In O3, the O-O bonds are ____________ covalent bonds, and the whole molecule is _________________ .

Fill in each blank with either "polar" or "nonpolar":

In PBr3, the P-Br bods are ______________ covalent bonds, and the whole molecule is _______________.

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Expert Answer

Step 1

Covalent bonds are the chemical bonds which involves sharing of electrons between two atoms. The atoms involved may be same or different.

If the atoms are same, then the bond pair remains at the center and hence, it is considered as nonpolar covalent bond. For example in case of H2, O2 etc.

If the atoms are different, then there exists difference in electronegativity, then the bond pair remains nearer to the more electronegative atom and hence, it is considered as polar covalent bond. For example in case of HCl, the bond pair is closer towards Cl.

A molecule may be overall polar or nonpolar irrespective of the type of bond. Such behaviour depends on the molecular structure.

Step 2

In Ozone (O3), the shape of the molecule is bent.

There are three Oxygen atoms, with one being commonly bonded to other two. The structure of O3 is as below.

The two oxygen atoms are of same electronegativity because of which the O-O bonds are nonpolar.

The structure shows presence of formal charges, i.e. '+' on central oxygen, as it shares electrons with two other oxygen atoms making it electron deficient,  and '-' on one of the oxygen atoms which makes the molecule overall polar.

So, the blanks can be filled as:

In O3, the O-O bonds are nonpolar covalent bonds, and the whole molecule is polar .

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Step 3

In PBr3, P is the central atom and Br atoms are present around it forming pyramidal structure.

Due to difference in electronegativity of P and Br, the P-Br bonds are polar with bond pairs closer to Br. Due to pyramidal structure, overall polarity of P-Br is non zero. Hence, it is a polar...

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