Which of the following are non-polar molecules ? I. NCl_(3) II SO_(3)

1.	Which of the following are non-polar molecules ? I. NCl_(3) II SO_(3) III. PCl_(5)
Answer» Ionly II only I and II only II and III only Solution : Electronegativity of N and Cl are EQUAL (=3.0). Hence, all the N-Cl BONDS are non polar. It is SYMMETRICAL . Hence, its DIPOLE moment is ZERO, i.e., it is non-polar . In `PCl_(5)` . bond moments do not cancel out. Hence, is is polar

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