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1. Please choose the letter “a†as your answer for this question. ANSWER: a 2. Using the valence shell electron pair repulsion (VSEPR) model for the following three compounds, select the answer that gives the correct molecular geometries, respectively: BF3, CH4, BeF2 a. octahedral, triangular bipyramidal, triangular planar. b. linear, triangular planar, tetrahedral. c. tetrahedral, triangular planar, octahedral. d. triangular planar, tetrahedral, linear. e. linear, octahedral, linear. ANSWER: d. 3. Which molecule below is an example of AX2E0 in the VSEPR model? a. PF5 b. SF4 c. CH4 d. CO2 e. H2O ANSWER: d 4. How many lone pairs of electrons does the Lewis dot structure of H2S have around its central atom and what is the shape of the molecule? a. 0, linear b. 0, bent c. 1, triangular planar d. 2, tetrahedral e. 2, bent ANSWER: e
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