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Which are non-polar molecules? I. NCl(...

Which are non-polar molecules?
`I. NCl_(3) " "II. SO_(3)" "III. PCl_(5)`
The correct option is :

A

I only

B

II only

C

I and II only

D

II and III only

Text Solution

Verified by Experts

The correct Answer is:
C

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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