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1. Which of the following statements concerning the carbon dioxide molecule is correct?
a) The molecule contains two sigma bonds
b) the carbon is described by sp2 hybridization
c) the molecule contains four pi bonds
d) Each oxygen is described by sp3 hybridization
2. According to the principles of VSEPR applied on ICI5, which of the following is incorrect?
a) electron pair geometry=octahedral
b) hybridization=sp3d
c)one lone pair and 5 bonding pairs
d) molecular geometry=square pyramid
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