HgSO_(4) 9. A+Barrow HCequiv CHxrightarrow (-272)arrow Axrightarrow [C_(2),H_(2)H_(2)Br}(-27)Bxrightarrow [Delta ](NaH)Cxrightarrow [CH_(3)Cl](C_(2)Cl)Dxrightarrow [Cl_(2)](Cl_(2))D

The correct answer is D.Explanation:The given chemical reactions represent a series of transformations involving different compounds. Let's break down the reactions step by step:1. (acetylene) undergoes a reaction with hydrogen bromide ( ) to form (vinyl bromide).2. then reacts with sodium hydride ( ) to form (acetylene).3. reacts with chlorine ( ) to form (dichloroethene).4. then reacts with (methyl chloride) to form (which is ).5. Finally, reacts with chlorine ( ) to form again.Therefore, the final product of the given reactions is , which is .