MCQ
$2-$ Hexyne gives trans $-2-$ Hexene on treatment with :
- A$Pt/H_2$
- ✓$Li /NH_3$
- C$Pd/BaSO_4$
- D$LiAlH_4$

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Reason : It has a plane of symmetry.
$(A)$ In $B _{2} H _{6}$, all $B - H$ bonds are equivalent.
$(B)$ In $B _{2} H _{6}$ there are four $3-$centre$-2-$electron bonds.
$(C)$ $B _{2} H _{6}$ is a Lewis acid.
$(D)$ $B _{2} H _{6}$ can be synthesized form both $BF _{3}$ and $NaBH _{4}$.
$(E)$ $B _{2} H _{6}$ is a planar molecule.
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