Question

Which of the following has zero dipole moment?

• A. CH$_3$Cl
• B. CCl$_4$
• C. CH$_2$Cl$_2$
• D. CHCl$_3$

Hint:

In molecules with symmetrical geometry, like CCl$_4$, the dipoles of individual bonds cancel out, leading to zero dipole moment.

Answer 1

The Correct Option is B

Step 1: Understand dipole moment.
The dipole moment is a measure of the separation of charge in a molecule. Molecules with symmetrical structures where the dipoles cancel out have zero dipole moment.
Step 2: Analyze the options.
- CH$_3$Cl, CH$_2$Cl$_2$, and CHCl$_3$ all have asymmetrical structures, so their dipoles do not cancel out, and they have non-zero dipole moments. - CCl$_4$ has a symmetrical tetrahedral structure, and the dipoles of the four C-Cl bonds cancel each other out, resulting in a zero dipole moment.
Step 3: Apply to the options.
The compound with zero dipole moment is (B) CCl$_4$.
Final Answer: \[ \boxed{\text{CCl}_4} \]