Match List I with List II. Ethane, NEET 2025: Organic Chemistry PYQ

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Q.
Match List I with List II. [2024]

List I List II

(Molecule) (Number and types of bond/s between two carbon atoms)

A. Ethane I. one $σ$ -bond and two $π$ -bonds

B. Ethene II. two $π$ -bonds

C. Carbon molecule, $C_{2}$ III. one $σ$ -bond

D. Ethyne IV. one $σ$ -bond and one $π$ -bond

Choose the correct answer from the options given below:

1 A-I, B-IV, C-II, D-III

2 A-IV, B-III, C-II, D-I

3 A-III, B-IV, C-II, D-I

4 A-III, B-IV, C-I, D-II

Ans.
(3)

One $σ$ -bond between C atoms (A - III).

One $σ$ -bond and 1 $π$ -bond between C atoms (B - IV).

$C_{2}$ molecule: Two $π$ -bonds (C - II)

Ethyne: $H — C \equiv C — H$

One $σ$ -bond and two $π$ -bonds (D - I)

Solution

1 A-I, B-IV, C-II, D-III

2 A-IV, B-III, C-II, D-I

3 A-III, B-IV, C-II, D-I

4 A-III, B-IV, C-I, D-II

Ans.
(3)

One $σ$ -bond between C atoms (A - III).

One $σ$ -bond and 1 $π$ -bond between C atoms (B - IV).

$C_{2}$ molecule: Two $π$ -bonds (C - II)

Ethyne: $H — C \equiv C — H$

One $σ$ -bond and two $π$ -bonds (D - I)

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	List I		List II
	(Molecule)		(Number and types of bond/s between two carbon atoms)
A.	Ethane	I.	one $σ$ -bond and two $π$ -bonds
B.	Ethene	II.	two $π$ -bonds
C.	Carbon molecule, $C_{2}$	III.	one $σ$ -bond
D.	Ethyne	IV.	one $σ$ -bond and one $π$ -bond

Solution

1 A-I, B-IV, C-II, D-III

2 A-IV, B-III, C-II, D-I

3 A-III, B-IV, C-II, D-I

4 A-III, B-IV, C-I, D-II

Ans. (3) One σ-bond between C atoms (A - III). One σ-bond and 1 π-bond between C atoms (B - IV). C2 molecule: Two π-bonds (C - II) Ethyne: H—C≡C—H One σ-bond and two π-bonds (D - I)

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Ans.
(3)

One $σ$ -bond between C atoms (A - III).

One $σ$ -bond and 1 $π$ -bond between C atoms (B - IV).

$C_{2}$ molecule: Two $π$ -bonds (C - II)

Ethyne: $H — C \equiv C — H$

One $σ$ -bond and two $π$ -bonds (D - I)