Question

Which bond angle $\theta$ would result the maximum dipole moment for the triatonuc molecules $X{Y}_2$ as shown below?

• A. ${90}^o$
• B. ${120}^o$
• C. ${150}^o$
• D. ${180}^o$

Answer 1

The correct option is A ${90}^o$

The dipole moment of $2$ dipoles inclined at an angle $\theta$ is given by,

$\mu =\sqrt{x^2+y^2+2xycos\theta },cos90=0$

$\therefore$ The dipole moment is maximum for $\theta ={90}^0$