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WBCS Preliminary Examination 2017 — General Studies · Question 116 of 200

Q116
General ScienceChemistry
Conversion of $CH_3C\equiv CH$ to $CH_3CH=CH_2$ needs
  1. a.Lindlar catalyst
  2. b.$H_2/Pd$
  3. c.$NaBH_4$
  4. d.$LiAlH_4$

Answer: (A) Lindlar catalyst

Lindlar's catalyst (a poisoned palladium catalyst) selectively hydrogenates alkynes to the corresponding cis-alkenes, stopping the reaction before full reduction to the alkane, unlike plain $H_2/Pd$ which would over-reduce it.

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Conversion of CH_3C\equiv CH to CH_3CH=CH_2 needs — WBCS Preliminary Examination 2017 Q116 | Prostuti360°