16. Which molecule below is paramagnetic? a. F2 b. 02 c. C2 d. Be e. Cl 17. Whic

Question

16. Which molecule below is paramagnetic? a. F2 b. 02 c. C2 d. Be e. Cl 17. Which statement below regarding bonding theories is FALSE? a. Lewis structures are usually adequate when focusing on row 2 atoms and their bonding patterns b. The magnetic and spectroscopic properties of molecules are best described using Lewis structures. c. Valence bond theory is useful in understanding the shapes of molecules. d. VSEPR theory allows us to predict molecular geometry e. MO theory explains magnetic and spectroscopic properties of molecules. 18, which statement regarding a bond between two carbon atoms is TRUE? The region of high electron density lies along the bond axis connecting the nuclei of the two atoms. a. b. It can be described by the overlap of sp hybrid orbitals from each atom. c. It can be described by the overlap of sp2 hybrid orbitals from each atom. d. It can be described by the overlap of a p atomic orbital from one atom with an sp hybrid orbital from the other atom. e. It can be described by the overlap of p atomic orbitals from each atom. 19. Which molecule below has a central atom with the same hybridization as the oxygen in water? a. SO2 b. OCS c. CS2 d. NHs e. CO2 20. What type of hybridization is needed to describe the bonding in a seesaw-shaped molecule? a. d. sp c.

Explanation / Answer

Ans 16 : e) Cl

The magnetism of the molecule depends on the pairing of its electrons. If there are unpaired electrons present in its orbital , the molecule is paramagnetic ,and if no unpaired electrons are present , the molecule is diamagnetic.
Since Cl is atom and not molecule , it has unpaired electron in its orbital , which imparts it a paramagnetic character.

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