All the following molecules have polar bonds and are polar molecules EXCEPT a. C
ID: 521771 • Letter: A
Question
All the following molecules have polar bonds and are polar molecules EXCEPT a. CIF_3. b. PF_3. c. PF_3. d. SF_4. e. H_2 CF_2. Which of the following molecules has polar bonds and is nonpolar? a. HF b. ICI_3 c. NF_3 d. SF_4 c. BF_3 Which of the following compounds is nonpolar? a. XeF_2 b. HCl c. SO_2 d. H_2S c. N_2 O Which of the following molecules is polar? a. BF_3 b. CCl_4 c. CO_2 d. NO_2 c. SF_4 The molecule AX_3, in which A is the central atom, is polar and obeys the octet rule; therefore, a. A has no lone pairs. b. A has one lone pair. c. A has two lone pairs. d. A has three lone pairs. c. A has four bonding pairs. Which response contains all the characteristics listed that should apply to PF_3? 1. trigonal planar 2. one unshared pair of electrons on P 3. sp^2-hybridized phosphorus atom 4. polar molecule 5. polar bonds a. 1, 4, and 5 b. 2, 3, and A C. 1, 2. and 4 d. 2, 4, and 5 e. 1, 3, and 5Explanation / Answer
16) d, because four fluorine are in opposite direction to each other causes zero dipole moment.
17)d, as S-F bond is polar but overall molecule is nonpolar
18)a, It's a linear molecule with the fluorines symmetrically on the outside, and the xenon in the middle. It has no dipole moment.
19)a, as BF3 will have a net dipole moment .
20)b, as 3*2=6 ele-s . So other 2 electron ls present as lone pair.
21) In PF3 phosphorus has one lone pair and three bond pairs, which means that total electron pairs is four. So it requires four hybrid orbitals to make the molecule. In Sp3 hybridization there are 4 hybrid orbitals, 1 s and 3 p orbitals.
Its shape will be trigonal pyramidal. And it will have polar bonds and have a dipole moment so polar molecule.
Hence, PF3 has a hybridization of sp3.
So, correct choice is d.