Which of the following is least reactive towards hydrogenation?
A
CH3−C≡C−CH3
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B
CH3−C≡CH
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C
HC≡CH
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D
H2C=CH2
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Solution
The correct option is DH2C=CH2 Alkenes are less reactive than alkynes towards hydrogenation because alkynes are less sterically hindered in comparison to alkenes. Hence, the correct option will be option (d).