Which of the following is capable of exhibiting cis-trans isomerism?()
A. 1-butene
B. 1-pentene
C. cyclohexene
D. ethene
E. 2-butene
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Which of the following contributes to make ΔG° more negative?()
A. use of a catalyst
B. a more positive ΔH°
C. a more positive ΔS°
D. a larger rate constant
E. none of the above
Benzene is a molecule with formula C6H6. If it contains no triple bonds, then how many total double bonds and rings does it contain? ()
A. 1
B. 2
C. 3
D. 4
E. 5
β-Phellandrene is a hydrocarbon component of eucalyptus oil whose molecular formula is C10H16. A molecule of β-phellandrene contains 2 π-bonds. How many rings are in β-phellandrene?()
A. 0
B. 2
C. 1
D. 3
E. 2
F. 4
G. 3
H. 5
I. 4 5.An acyclic hydrocarbon with the formula C20H34 has how many pi bonds?
J. 6.0
Which of the following statements about ethene, C2H4, is ()? ()
A. The H-C-H bond angles are approximately 109.5°.
B. All of the hydrogen atoms are in the same plane.
C. There is a total of five sigma bonds.
D. The carbon atoms are sp2 hybridized.
E. The H-C-H bond angles are approximately 120°.