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Chemical Bonding and Molecular Structure

Sigma and Pi Bonds in Hydrocarbons

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Bonding between carbon atoms in ethane, ethene, ethyne and C2

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2024 1 question

1 Chemical Bonding and Molecular Structure Medium

Match List-I with List-II regarding the number and types of bonds between two carbon atoms in the given molecules.

Pick the matching item from Column II for each row.
Column I
- A. ethane Match for A
- B. ethene Match for B
- C. carbon molecule, $C_2$ Match for C
- D. ethyne Match for D
Column II
- I. one $\sigma$-bond and two $\pi$-bonds
- II. two $\pi$-bonds
- III. one $\sigma$-bond
- IV. one $\sigma$-bond and one $\pi$-bond
Correct answer: A → III, B → IV, C → II, D → I

Ethane ($CH_3-CH_3$): one $\sigma$-bond Ethene ($CH_2=CH_2$): one $\sigma$-bond and one $\pi$-bond Carbon molecule $C_2$: two $\pi$-bonds Ethyne ($HC \equiv CH$): one $\sigma$-bond and two $\pi$-bonds Correct match: A-III, B-IV, C-II, D-I.