Multiple Choice
Which of the following statements about carbon skeletons is true?
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2. Molecular Representations
Functional Groups
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Which of the following correctly matches each hydrocarbon class to its general structure?
A
Alkane: ; Alkene: ; Alkyne:
B
Alkane: ; Alkene: ; Alkyne:
C
Alkane: ; Alkene: ; Alkyne:
D
Alkane: ; Alkene: ; Alkyne:
Verified step by step guidance1
Recall the general formula for alkanes, which are saturated hydrocarbons with only single bonds. The formula is \(C_nH_{2n+2}\), where \(n\) is the number of carbon atoms.
Understand that alkenes contain at least one carbon-carbon double bond, making them unsaturated hydrocarbons. Their general formula is \(C_nH_{2n}\) because the double bond reduces the number of hydrogen atoms by two compared to alkanes.
Recognize that alkynes have at least one carbon-carbon triple bond, which further reduces the number of hydrogen atoms. Their general formula is \(C_nH_{2n-2}\).
Match each hydrocarbon class to its corresponding general formula based on the number of hydrogens relative to carbons: Alkane with \(C_nH_{2n+2}\), Alkene with \(C_nH_{2n}\), and Alkyne with \(C_nH_{2n-2}\).
Verify that the correct answer choice aligns with these formulas, ensuring that the hydrocarbon classes are paired with their proper general structures.
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