Question

9. The hybridization of the central nitrogen atom in the molecule N O is (A) sp (B) (C) sp (D) spid (Esp' 10. What bond angles are predicted by VSEPR theory for the F-P-F bonds in PE 32 (Select all correct answers.) A 90 B . 109.5° C. 120° D. 180°E None of these 11. Which of the following molecules has polar bonds but is a nonpolar molecule! (Select all correct answers.) (A) CO (B) BF, (C) CCI (D) Xel. (E) None of these Short Answer. 12. The compounds Brand ICI have the same number of electrons, yet Bry melts at-7.2°C and ICI melts at 27.2°C. Explain. 13. Ammonia is both a donor and an acceptor of hydrogen in hydrogen-bond formation. Draw a diagram showing the hydrogen bonding of an ammonia molecule with two other ammonia molecules. 14. Arrange the following in order of increasing boiling point: RbF, CO,.CH,OH, CH,Br. Explain your reasoning. 15. a) What is viscosity? b) What is the relationship between intermolecular forces and viscosity? c) Why does the viscosity of a liquid decrease with increasing temperature?

Answer 1

9. NO NE8-E > N=N=0 sphypridization option. A. 10 a h and 126 option (A) and (C) !! co-polar; BE-non-polar; ecly-non.pdar, Xery - non-plar. Answer! BE aj cely Xery 12, I and I have different electronegativites, so the covalent I band is polar and molemles are attracted by dipde-diple forces Id have net dipole moment whereas Bry does not have dipde moment