(a) In the acetylene molecule (C2H2), which of the following are present? A) 2 VSEPR electron pairs around each carbon atom B) 3 ? and 1 ? bonds C) 2 ? bonds D) 1 ? bond (b) In ethylene, C2H4, the two carbon atoms are joined in which of the following ways? A) to the hydrogens by 4 ? bonds B) to each other by 2 ? bonds C) to each other by 1 ? and 2 ? bonds D) by a ? bond formed from the overlap of their atomic s orbitals (c) Which of the following statements about ethane, C2H6, is correct? A) There is a ? bond. B) There is a ? bond from carbon to one of the hydrogen atoms. C) There are a total of 7 ? bonds. D) There are 6 ? bonds and 1 ? bond. (d) Rotation can occur around which of the following? A) the carbon-carbon bonds in ethane (C2H6), ethylene (C2H4), and acetylene (C2H2) B) only the carbon-carbon bond in ethylene C) only the carbon-carbon bond in ethane D) only the carbon-carbon bond in acetylene (e) In ethylene (C2H4), VSEPR predicts which of the following? A) formation of ? and ? bonds. B) unhybridized p atomic orbitals. C) trigonal planar geometry around each carbon atom. D) sp2 hybridization occurs.