Question

In a covalent bond between two atoms, the more electronegative atom will attract more electron density toward itself, producing a polar bond. The more electronegative element will carry a partial negative charge, whereas the less electronegative element will carry a partial positive charge. The direction of the bond dipole is always toward the more electronegative element. This is often indicated by an arrow, as shown in the figure. The magnitude of the bond polarity can be estimated by using the difference in electronegativity values of the atoms forming the bond. For example, in the molecule Cl_2, the Cl-Cl bond is nonpolar because there is no difference in electronegativity between two atoms of the same element. In the CIBr molecule, however, the Cl-Br bond is polar because Cl and Br have different electronegativity values. A Cl-I bond would be more polar than a Cl-Br bond because there is a greater electronegativity difference between Cl and I than between Cl and Br. In the molecule FBr, which atom has the partial negative charge? Of the molecules SiF_4 and SiBr_4. which has bonds that are more polar? SiF_4 SiBr_4 Both of the carbon-oxygen double bonds in CO_2 are polar. In which direction should the polarity arrows point? The bonds are nonpolar and there are no polarity arrows. The polarity arrows should point toward the central carbon atom. The polarity arrows should point away from the central carbon atom.

Answer 1

In FBr fluorine is more electronegative than Br , so it will pull electron more towards itself and will gain partial negative charge.

Therefore F is correct option.

Polarity depends upon the electronegativity between two atoms.More is the electronegativity difference more is the polarity.

In both the molecules Si is common , so comparison of polarity among two molecules will be judged according to the halogen atom attached.

Since F is more electronegative than Br , so SiF₄ will be more polar than SiBr₄.

Polarity arrows point towards more electronegative atom.

Among carbon and oxygen , oxygen is more electronegative , so arrows will point towards oxygen.

Carbon being the central , the arrows will point away from the central atom.