But-2-yne and hydrogen (one mole each) are separately treated with (i) 
and (ii) 
to give the products X and Y respectively.
Identify the incorrect statements.
and 
are stereoisomers. and and
and Only and
is higher than 
. Only
Only
to give different products. Choose the correct answer from the options given below: Only
Text Solution
Verified by ExpertsA
But-2-yne ( 
) undergoes partial hydrogenation.
Reaction with 
(Lindlar-like conditions for 1 mole 
) gives cis-but-2-ene as product 
.
Reaction with 
liq. 
(Birch reduction) gives trans-but-2-ene as product 
.
Statement A: 
(cis) and 
(trans) are geometrical isomers, hence stereoisomers. This is correct.
Statement B: Cis-but-2-ene ( 
) has a non-zero dipole moment ( 
) due to the additive nature of bond moments, while trans-but-2-ene ( 
) has zero dipole moment ( 
) due to symmetry. Thus, statement B is incorrect.
Statement C: Cis-isomers generally have higher boiling points than trans-isomers due to higher dipole-dipole interactions. So, B.P. of 
. This is correct.
Statement D: Reductive ozonolysis ( 
) of both cis-but-2-ene and trans-but-2-ene yields the same product, ethanal ( 
). Thus, statement D is incorrect.
The incorrect statements are B and D.
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