Which of the following hydrocarbons has a double bond in its carbon skeleton?
A) C3H8
B) C2H6
C) CH4
D) C2H4
E) C2H2
Answer: D
Which of the following hydrocarbons has a double bond in its carbon skeleton?
A) C3H8
B) C2H6
C) CH4
D) C2H4
E) C2H2
Answer: D
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