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ChemistryJEE Main 23 Jan 2026, Shift 1·Q10·MCQ·Easy–moderate

Hydrocarbons · Alkyne reduction geometrical isomers

But-2-yne and hydrogen (one mole each) are separately treated with (i) Pd/C and (ii) Na/liq. NHX3\ce{NH3} to give the products X and Y respectively.
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 OX3\ce{O3}/Zn + HX2O\ce{H2O} to give different products.
Choose the correct answer from the options given below :
  1. (1)B and C only
  2. (2)B and D only
  3. (3)A and B only
  4. (4)A and C only

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See the full 23 Jan 2026, Shift 1 paper