What catalyst is employed when benzene is prepared from acetylene at 70?C?

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Question:What catalyst is employed when benzene is prepared from acetylene at 70?C?

1.Cr2O3 + A?2O3 + SiO2

2.Raney nickel

3.Organo-nickel

4.Ni 250 - 300?C

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  1. What catalyst is employed when benzene is prepared from acetylene at 70?C?
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