Question

The correct increasing order of dipole moment of \( NF_3, H_2S, CHCl_3 \) and \( NH_3 \) is

• A. \( NF_3<H_2S<CHCl_3<NH_3 \)
• B. \( NH_3<H_2S<CHCl_3<NF_3 \)
• C. \( NF_3<CHCl_3<H_2S<NH_3 \)
• D. \( NH_3<CHCl_3<H_2S<NF_3 \)
• E. \( CHCl_3<H_2S<NF_3<NH_3 \)

Hint:

Vector cancellation reduces dipole moment (as in \( NF_3 \)).

Answer 1

The Correct Option is A

Concept: Dipole moment depends on geometry and electronegativity.

Step 1: Order reasoning.
\[ NF_3 \text{ (least)}<H_2S<CHCl_3<NH_3 \text{ (highest)} \]