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Which of the following can forms metallic derivatives by replacement of H-atoms?

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Which of the following can forms metallic derivatives by replacement of H-atoms?
A. Ethane
B. Methane
C. 2-Butyne
D. 1-Pentyne
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Terminal alkynes are acidic in nature. Hydrogen attached to triply bonded carbon atom in acidic in nature and as such can be replaced by electropositive metals. 1-Pentyne is a terminal alkyne. 
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