Question

Of the following molecules, the one, which has permanent dipole moment, is :

• A. SiF4
• B. BF3
• C. PF3
• D. PF5

Answer 1

Answer: (C)

PF3

Answer 2

$\mu$ $\neq$ 0 ;

SiF4 , BF3 and PF5 are symmetrical molecules thus $\mu$ = 0.