Q.

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.      [2026]

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:

1 B and D only  
2 A and C only  
3 A and B only  
4 B and C only  

Ans.

(1)