1) Formaldehyde ( CH2O ) , a liquid with unpleasant odour with the skeletar strucutre . Which of these following is the lewis structure for formaldehyde ? a) b) c) d) 2) Identify shape of SiF4 a) tetrahedral b) seesaw c) trigonal planar d) trigonal bipyramidal 3) Identify molecular shape and bond angle of SF4 a) Trigonal bypiramidal , 109.5 b) see saw , 109.5 c) tetrahedral , 109.5 4) Using VSPER theory predict molecular geometry for PBr5 a) tetrahedral b) octahedral c) trigonal bypiramidal d) trigonal planar

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