Which of the following is Lindlar catalyst?

Zinc chloride and

H C l

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Partially deactivated palladised charcoal

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Sodium and liquid

N H_{3}

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Cold dilute solution of

K M n O_{4}

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Solution

The correct option is B Partially deactivated palladised charcoal
Lindlar catalyst is made up of palladium, calcium carbonate, and some catalyst poisons.
It has three primary components.
i. Palladium (accounts for only 5% of the total weight)
ii. Calcium Carbonate (over which the palladium is deposited)
iii. Catalyst poisons (typically lead salts and quinoline)

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Similar questions

Q. When alkyl disubstituted acetylene undergoes addition with hydrogen in presence of Lindlars catalyst, the alkene formed is:

List - I List - II

A) Lindlar catalyst i) Hydrogenation of oils

B) Fenton’s reagent ii) $P d + B a S O_{4}$

C) Zigler Natta catalyst iii) $F e S O_{4} + H_{2} O_{2}$

D) Raney Nickel iv) $R_{3} A l + T i C l_{4}$

A hydrocarbon of unknown structure has the formula $C_{8} H_{10}$ . On catalytic hydrogenation over the Lindlar catalyst, 1 equivalent of $H_{2}$ is absorbed. On hydrogenation over a palladium catalyst, 3 equivalents of $H_{2}$ are absorbed. Suggest several structures:

Q. In the reactions

(B) Lindlar catalyst \leftarrow -------- - H_{2} R - C \equiv C - R N a / N H_{3} - ---- \to (A)

(A)

and

(B)

are geometrical isomers. Then:

B L i n d l a r c a t a l y s t / H_{2} \leftarrow ----------- - R - C \equiv C - R N a / N H_{3} - ---- \to A

If A and B are geometrical isomers

(R C H = C H R) .

then:

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