The hydrocarbon which can react with sodium in liquid ammonia is

  • Option 1)

    CH_{3}CH_{2}C\equiv CCH_{2}CH_{3}

  • Option 2)

    CH_{3}CH_{2}CH_{2}C\equiv CCH_{2}CH_{2}CH_{3}

  • Option 3)

    CH_{3}CH_{2}C\equiv CH

  • Option 4)

    CH_{3}CH= CHCH_{3}

 

Answers (1)

As we learnt in 

Birch Reduction -

Alkynes on reduction with sodium in liquid NH3 form trans alkene.

- wherein

 

 Alkynes having terminal -\:C\equiv H react with Na in liquid NH3 to yield H2.


Option 1)

CH_{3}CH_{2}C\equiv CCH_{2}CH_{3}

This option is incorrect.

Option 2)

CH_{3}CH_{2}CH_{2}C\equiv CCH_{2}CH_{2}CH_{3}

This option is incorrect.

Option 3)

CH_{3}CH_{2}C\equiv CH

This option is correct.

Option 4)

CH_{3}CH= CHCH_{3}

This option is incorrect.

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