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MCQMediumJEE Main 2026 · 23 January, Shift 1Isomerism (Structural, Stereoisomerism)

Chemistry Question from JEE Main 2026 · 23 January, Shift 1

But-2-yne and hydrogen (one mole each) are separately treated with (i) Pd/C and (ii) Na/liq.NH₃ to give the products X and Y respectively.

Reaction scheme showing but-2-yne reacting with H2; upper arrow Pd/C gives product X and lower arrow Na over liquid NH3 gives product Y.

Identify the incorrect statements.

A. X and Y are stereoisomers.

B. Dipole moment of X is zero.

C. Boiling point of X is higher than Y.

D. X and Y react with O₃/Zn + H₂O to give different products.

Choose the correct answer from the options given below :

  • A

    A and B Only

  • B

    A and C Only

  • C

    B and C Only

  • D

    B and D Only

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