Question:
Which of the following compounds has a zero dipole moment?
Which of the following compounds has a zero dipole moment?
Show Hint
Symmetrical molecules like CO\(_2\), CCl\(_4\), and BeF\(_2\) often have zero dipole moments.
Updated On: Apr 16, 2026
- CH\(_2\)Cl\(_2\)
- NH\(_3\)
- CH\(_4\)
- PH\(_3\)
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
A molecule has a zero dipole moment if the vector sum of all individual bond dipoles cancels out, which happens due to its symmetrical geometry.
Step 2: Detailed Explanation:
• CH\(_2\)Cl\(_2\): Tetrahedral but not symmetric (H and Cl differ). Net dipole moment is non-zero. • NH\(_3\): Trigonal pyramidal. The lone pair causes a net dipole moment. • CH\(_4\): Tetrahedral with identical C-H bonds. The vector sum of bond dipoles is zero. • PH\(_3\): Similar to NH\(_3\), has a net dipole moment.
Step 3: Final Answer:
CH\(_4\) has a zero dipole moment, which corresponds to option (C).
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