Which of the following order of reagent is chosen to prepare 1,3-butadiene from `C_2H_2`

Options

A. `Cu_(2)Cl_(2)//NH_(4)Cl and H_(2)//Pd(BaSO_4)`
B. `NH_(4)Cl//CuCl and H_2//Pd(BaSO_4)`
C. `H_(2)//Pd(BaSO_4) and CuCl //NH_(4)Cl`
D. `H_(2)//Pd(BaSO_(4)) and NH_(4)Cl//CuCl`

Answer

A

Explanation

`underset("Acetylene")(CH-=CH) +CuCl_2//NH_4Cl rarr {:(Cu-C-=C-Cu),(" Red ppt"),(" "darr H_2//Pd(BaSO_4)),(CH_2=CH-C=CH_2),(" 1,3-butadiene"):}`