A) \[{{C}_{6}}{{H}_{6}}\]
B) \[{{C}_{2}}{{H}_{2}}\]
C) \[{{C}_{2}}{{H}_{4}}\]
D) \[{{C}_{2}}{{H}_{6}}\]
Correct Answer: B
Solution :
Na has basic characteristics so, it reacts with acidic compounds. In the given compounds \[{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{2}}}\] has acidic nature because H attached with triple bonded carbon has acidic Character so, sodium reacts with acetylene to evolve \[{{\text{H}}_{2}}\]gas. \[\underset{CH}{\overset{CH}{\mathop{|||}}}\,+2Na\xrightarrow{{}}\underset{\text{Sodium}\,\text{acetylide}}{\mathop{\underset{C.Na}{\overset{C.Na}{\mathop{|||}}}\,}}\,+{{H}_{2}}\]
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