Question

Each of the following options contains a set of four molecules. Identify the option(s) where all four molecules possess permanent dipole moment at room temperature.

• A. $BeCl_2, CO_2, BCE, CHCI_3$
• B. $NO_2, NH_3, POCh, CH_3CI$
• C. $BF_3, O_3, SF_6, XeF_6$
• D. $SO_2, (XH_5Cl, H_2Se, BrF_5$

Answer 1

Answer: (D)

$SO_2, (XH_5Cl, H_2Se, BrF_5$

Answer 2

For symmetrical molecule $\mu = 0$
For unsymmetrical molecule $\mu \ne 0$