Question

Carbon tetrachloride is nonpolar and chloroform is polar explain why

Answer 1

Answer:

The four bonds of carbon tetrachloride (CCl4) are polar, but the molecule is nonpolar because the bond polarity is canceled by the symmetric tetrahedral shape. When other atoms substitute for some of the Cl atoms, the symmetry is broken and the molecule becomes polar.

In this case, chloroform is considered non-polar. If one wants a more quantitative description, usually the dielectric constant is used: in this case polarity is not defined as a dichotomic characteristic, but every solvent will lie somewhere on a continuum that goes from "extremely polar" to "extremely non polar".

Answer 2

Carbon tetrachloride is nonpolar and chloroform is polar because in carbon tetrachloride bond polarity is cancelled out but in chloroform bond polarity is not cancelled out.

Explanation:

• Chemical formula of carbon tetrachloride is $CCl_{4}$ and it is tetrahedral in shape. As chlorine being more electronegative in nature, electrons from carbon are more attracted towards the chlorine atom.

• Hence, dipole moment of $CCl_{4}$ is zero and it is non-polar in nature. On the other hand, chemical formula of chloroform is $CHCl_{3}$ and hydrogen being less electronegative than carbon atom.

• So, electrons from hydrogen atom are more attracted towards the carbon atom. Hence, the dipole moment of $CHCl_{3}$ is not zero and therefore, this compound is polar in nature.

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