The pair of molecules that are metamers among the following is:
1
2.
3.
4.
Subtopic:  Structural Isomers | Conformational Isomers |
 72%
Level 2: 60%+
NEET - 2026
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Given below are two statements:
Statement I: trans-But-2-ene upon treatment with Br2 in CCl4 gives the following product.
Statement II: cis-But-2-ene upon treatment with alkaline KMnO4 gives the following product.

In the light of the above statements, choose the most appropriate answer from the options given below.
1.  Statement I is incorrect but Statement II is correct
2.  Both Statement I and Statement II are correct
3.  Both Statement I and Statement II are incorrect
4.  Statement I is correct but Statement II is incorrect
Subtopic:  Nomenclature | Structural Isomers | Conformational Isomers |
Level 4: Below 35%
NEET - 2026
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Which of the following statements about the conformers of ethane is correct?”

1. Bond angle changes, but bond length remains the same.
2. Both bond angle and bond length change.
3. Both bond angle and bond length remain the same.
4. Bond angle remains the same, but the bond length changes.

Subtopic:  Conformational Isomers |
 59%
Level 3: 35%-60%
NEET - 2017
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The most stable conformation of n-butane among the following is:

1. 2.
3. 4.
Subtopic:  Conformational Isomers |
 89%
Level 1: 80%+
AIPMT - 2010
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Dihedral angle in staggered form of ethane is:

1. 0°

2. 120°

3. 60°

4. 180°

Subtopic:  Conformational Isomers |
 70%
Level 2: 60%+
AIPMT - 2000
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R and S enantiomers differ in:

1. Chemical properties

2. Solubility in achiral solvent

3. Rotation of plane polarised light.

4. Dipole moment

Subtopic:  Conformational Isomers |
 86%
Level 1: 80%+
AIPMT - 2000
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