Question

In water molecule the two O – H bonds are oriented at an angle of $104.5^{0}$. In $BF_{3}$the three B – F bonds are oriented at an angle of $120^{0}$. In $BeF_{2}$the two Be – F bonds are oriented at an angle of $180^{0}$. Which of the following will have highest dipole moment?

• A. $BeF_{3}$
• B. $BF_{3}$
• C. $H_{2}O$
• D. All have zero dipole moment.

Answer 1

Answer: (C)

$H_{2}O$

Answer 2

: $BeF_{2}:\mu = 0$

$BF_{3}:\mu = 0$

$H_{2}O:\mu = 1.84D$