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trans-But`-2-`ene reacts with `D_(2)` in the presence of `Ni` as catayst. The product formed is

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trans-But`-2-`ene reacts with `D_(2)` in the presence of `Ni` as catayst. The product formed is
A. meso`-2,3-`dideuterobutane
B. rac`-2,3-`dideuterobutane
C. `(+)-2,3-`dideuterobutane
D. `(-)-2,3-`dideuterobutane
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Correct Answer - B
It is syn-hydrogenation due to chemical adsorption on the surface of `Ni`:
image
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