MCQ
$(X)$ $\&$ $(Y)$ are


- AEnantiomers
- ✓Diastereomers
- C$E$ $\&$ $Z$ isomer
- DConstitutional isomer

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$B.E(N -N) = 159\, kJ\, mol^{-1}$,
$B.E(H -H) = 436\, kJ\, mol^{-1}$
$B.E.(N \equiv N) = 941\, kJ\, mol^{-1}$,
$B.E(N -H) = 398\, kJ\, mol^{-1}\, .......\,kJ\, mol^{-1}$