1 / 20

Bonding Clicker quiz

Bonding Clicker quiz. D Oehlke 2012. Which pair of elements would be most likely to form a covalently bonded compound?. Li and Cl P and O c) Ca and S Zn and Br. Answer: B. Which one of the following compounds will have the greatest degree of covalent character in its bonding?.

skyler
Download Presentation

Bonding Clicker quiz

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Bonding Clicker quiz D Oehlke 2012

  2. Which pair of elements would be most likely to form a covalently bonded compound? • Li and Cl • P and O c) Caand S • Zn and Br Answer: B

  3. Which one of the following compounds will have the greatest degree of covalent character in its bonding? • LiCl • BeCl2 • CsCl • BaCl2 Answer: B

  4. According to the electronegativities of the elements given below, which bond will be the most polar? H 2.20 C 2.55 N 3.04 O 3.44 F 3.98 a) H-N b) H-O c) C-O d) N-F Answer: B the largest electronegativity difference is between H and O

  5. Which compound contains both ionic and covalent bonds?a) NO2b) Na2Oc) NH3 d) NH4Cl Answer: D Ammonium is a polyatomic ion and has covalent bonds. Ammonium chloride is made of ions

  6. The total number of valence electrons in the phosphonium ion, PH4+, isa) 8 b) 9 c) 10 d) 12 Answer: A phosphorus has 5 valence electrons, each hydrogen has one and one electron is lost

  7. The molecular shape of the PCl3 molecule isa) linearb) tetrahedralc) trigonalplanar d) trigonal pyramidal Answer: D trigonal pyramidal

  8. Which one of the following molecules would you expect to be bent rather than linear?a) H2Sb) C2H2c) CS2 d) BeF2 Answer: A hydrogen sulfide is bent.

  9. Which one of the following covalent chlorides is polar?a) BeCl2b) BCl3c) NCl3 d) CCl4 Answer: C nitrogen trichloride is trigonal pyramidal. Assymetric

  10. Which noble gas element has the highest boiling point?a) Kr b) Xe c) Ne d) He Answer: B Xenon has the strongest van der waals forces

  11. Which one the compounds below is BEST example of a molecular solid held together primarily by van der Waals forces?a) KI(s)b) CO2(s)c) H2O(s) d) Na2O(s) Answer: carbon dioxide

  12. All of the following gases would be expected to have appreciable solubility in water EXCEPT:a) CO2b) HClc) NH3 d) H2S Answer: A carbon dioxide is nonpolar

  13. Which of the following indicates the existence of strong intermolecular forces of attraction in a liquid?a) A very high vapor pressureb) A very high boiling pointc) A very low viscosity d) A very low density Answer: B

  14. Which liquid substance has polar molecules, covalent bonding between atoms of the molecule, and a significant degree of hydrogen bonding between the molecules?a) hydrogen fluoride, HFb) sodium chloride, NaClc)phosphorus (III) chloride, PCl3d) hydrogen, H2 Answer: A HF

  15. The sequence of increasing boiling points for CH3Br (4 oC), C2H5Br (38 oC), C3H7Br (71 oC) is best attributed to changes in the strengths of:a) covalent bondsb) dipole-dipole interactions c) hydrogen bondsd) van der Waals’ forces Answer: B

  16. Diamond is harder than graphite becausea) The van der Waals’ forces between molecules are stronger.b) The planar covalent bonding between atoms is greater.c) There is tetrahedral covalent bonding to four other carbon atoms. d) Its structure has double bonds. Answer: C

  17. CO2is a gas at room temperature and pressure, while SiO2 melts about 1700 oC and boils at 2200 oC.Account for these differences:a) CO2is molecular and SiO2 is metallicb) CO2has non-polar molecules while SiO2 has polar moleculesc) CO2is a molecular solid while SiO2 is a network solidd) Silicon-silicon bonds are stronger than carbon-oxygen bonds. Answer: C

  18. A crystalline substance with a high-melting point is a poor electrical conductor as a solid but a good conductor when melted. This substance is most likely:a) network covalent b) ionicc) metallicd) molecular Answer: b ionic

  19. Which of the following compounds would be expected to have the highest melting point?a) SO3 b) NaCl c) Na2O d) CO2 Answer: C sodium oxide is ionic. Oxide has a -2 charge

  20. Which one of the following compounds would be expected to have the lowest melting point?a) silicon dioxideb) cesium chloridec) potassium nitrate d) iodine Answer: a) silicon dioxide

More Related