A) \[Pd\]and\[C{{O}_{2}}\]
B) \[Pd\]and\[{{H}_{2}}\]
C) palladised charcoal deactivated with sulphur
D) \[Pd\]and\[CaC{{O}_{3}}\]
Correct Answer: D
Solution :
Lindlars catalyst is\[Pd-CaC{{O}_{3}}\]poisoned with lead acetate or quinoline. It is used for partial hydrogenation of alkynes. (i.e., =bond). \[R-C\equiv CH+{{H}_{2}}\xrightarrow[\begin{smallmatrix} Poisoned\text{ }with\text{ }quinoline \\ \,\,\,\,\,\,or{{(C{{H}_{3}}COO)}_{2}}Pb \end{smallmatrix}]{Pd-CaC{{O}_{3}}}\] \[RCH=C{{H}_{2}}\]
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