Question

Which substance has a polar covalent bond between its atoms?

• A. $K_{3}N$
• B. $N{H}_3$
• C. $C{a}_3{N}_2$
• D. $NaCl$

Answer 1

Answer: (B)

$N{H}_3$

Bonds that are partially ionic are called polar covalent bonds. In this bond a pair of electrons is unequally shared between two atoms.

For $N{H}_3$, the nitrogen atoms draw the shared electrons in the bonds close to it, so the nitrogen has a partly negative charge.