Ответы

CH3-C≡C-CH3 + H2 -> CH3-CH=CH-CH3
CH3-CH=CH-CH3 + H2 -> CH3-CH2-CH2-CH3
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CH3-C≡C-CH3 + H2 -> CH3-CH=CH-CH3
CH3-CH=CH-CH3 + H2 -> CH3-CH2-CH2-CH3