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MCQEasyJEE Main 2026 · 24 January, Shift 2Isomerism (Structural, Stereoisomerism)

Chemistry Question from JEE Main 2026 · 24 January, Shift 2

Given below are two statements:

Statement I: There are several conformers for n-butane. Out of those conformers,

Two Newman projections of n-butane. On the left, conformer (X) is fully eclipsed: both methyl groups point straight up and overlap, with the front and back hydrogens also eclipsing. Between the two projections the sentence reads "is the least stable and most stable conformer is". On the right, conformer (Y) is anti-staggered: the front methyl points up and the back methyl points down, with the hydrogens staggered.

Statement II: As the dihedral angle increases, torsional strain decreases from (X)(X) to (Y)(Y).

In the light of the above statements, choose the correct answer from the options given below.

  • A

    Both Statement I and Statement II are false

  • B

    Statement I is false but Statement II is true

  • C

    Statement I is true but Statement II is false

  • D

    Both Statement I and Statement II are true

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