Of the reaction conditions provided below, which would be expected to convert 1 mole of 4-methyl-1-pentyne into 2-methylpentane? A) H₂, Lindlar's catalyst B) Na, NH₃(l) C) 2 moles of HCl D) 2 moles H₂, Pt E) 1 mole H₂, Pt

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The correct choice is D, which involves the use of 2 moles of H2 (hydrogen gas) and a platinum catalyst. This combination facilitates the complete hydrogenation of 4-methyl-1-pentyne to 2-methylpentane by adding hydrogen across the triple bond, converting it first to a double bond and then to a single bond, resulting in a saturated hydrocarbon.

Of the Reaction Conditions Provided Below, Which Would Be Expected