Answer: A molecule having a covalent bond may be polar or nonpolar.
Explanation: Covalent bond is formed by sharing of electrons and ionic bond is formed by transfer of electrons.
Thus ionic molecules are always polar as they are formed by combination of positively charged ions called cations formed by less electronegative metals and negatively charged ions called anions formed by more electronegative nonmetals.
Covalent molecules which are formed by same elements have no difference in electronegativities are non polar but those formed by different elements having difference in electronegativities are polar.
For eg: Covalent molecule is non polar but covalent molecule is polar.
I believe the correct answer from the choices listed above is option B. A chemical formula written above or below the yield sign indicates <span>that the substance is used as a catalyst. I am certain with this answer. Hope this helps. Have a nice day.</span>