Question

Identify the correct set of molecules with zero dipole moment:

• A. $ \text{CO}_2, \text{NH}_3, \text{H}_2\text{O} $
• B. $ \text{NH}_3, \text{NF}_3, \text{BF}_3 $
• C. $ \text{PF}_3, \text{NH}_3, \text{CH}_4 $
• D. $ \text{CH}_4, \text{BF}_3, \text{CO}_2 $

Hint:

A quick way to identify non-polar molecules is to check:
• Is the geometry symmetrical?
• Are all surrounding atoms identical?
• Does the central atom contain no lone pair? If the answer is yes, the molecule usually has: \[ \mu = 0 \] Common non-polar shapes are:
• Linear ($AX_2$)
• Trigonal planar ($AX_3$)
• Tetrahedral ($AX_4$)

Answer 1

The Correct Option is D