D The C–F bond is very strong. 1 mark) 17. Which one of the following has a shape which is not influenced by a lone pair of electrons? A H2F+ B C BF3 D NF3 (Total 1 mark) 18. Which one of the following bond polarities is not correct? A in ethane B in bromoethane C in ethanol D in ethanal (Total 1 mark) 19. energy The total area under the distribution curve represents A total energy. B activation energy. C total number of reacting molecules. D total number of molecules present. (Total 1 mark) 20. The structure of the molecule of methyl 2-methylpropenoate is shown below. Which one of the following statements concerning this compound is not true?
D The C–F bond is very strong. 1 mark) 17. Which one of the following has a shape which is not influenced by a lone pair of electrons? A B H2F+ C BF3 D NF3 (Total 1 mark) 18. Which one of the following bond polarities is not correct? A in ethane B in bromoethane C in ethanol D in ethanal (Total 1 mark) 19. energy The total area under the distribution curve represents A total energy. B activation energy. C total number of reacting molecules. D total number of molecules present. (Total 1 mark) 20. The structure of the molecule of methyl 2-methylpropenoate is shown below. Which one of the following statements concerning this compound is not true?
as-level_paper_2_pp4.docx