Explanation:
An ammonia [tex](NH_{3})[/tex] molecule contains electronegative nitrogen atom. The difference between electronegativity of nitrogen and hydrogen atom is high.
Therefore, nitrogen will attract the shared pair of electrons more towards itself. As a result, there will be partial positive charge on hydrogen and partial negative charge on nitrogen.
Thus, due to these charges [tex]NH_{3}[/tex] is polar in nature.
