What is Lindlar's catalyst? Write its uses.
(N/A) Lindlar's catalyst is a form of partially deactivated palladium catalyst. It consists of palladium deposited on calcium carbonate $(CaCO_3)$ or barium sulfate $(BaSO_4)$,which is then poisoned with lead acetate or quinoline.
Its primary use is the partial hydrogenation of alkynes to form $cis$-alkenes. This reaction is stereoselective,ensuring the addition of hydrogen occurs on the same side of the triple bond.
Its primary use is the partial hydrogenation of alkynes to form $cis$-alkenes. This reaction is stereoselective,ensuring the addition of hydrogen occurs on the same side of the triple bond.
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Similar Questions
Which is the most suitable reagent among the following to distinguish compound $(3)$ from the rest of the compounds?
$1. CH_3-C \equiv C-CH_3$
$2. CH_3-CH_2-CH_2-CH_3$
$3. CH_3-CH_2-C \equiv CH$
$4. CH_3-CH=CH_2$
$1. CH_3-C \equiv C-CH_3$
$2. CH_3-CH_2-CH_2-CH_3$
$3. CH_3-CH_2-C \equiv CH$
$4. CH_3-CH=CH_2$
MediumAIIMS 2015
View SolutionGiven below are two statements:
Statement $I$: One mole of propyne reacts with excess of sodium to liberate half a mole of $H_2$ gas.
Statement $II$: Four $g$ of propyne reacts with $NaNH_2$ to liberate $NH_3$ gas which occupies $224 \ mL$ at $STP$.
In the light of the above statements,choose the most appropriate answer from the options given below:
Statement $I$: One mole of propyne reacts with excess of sodium to liberate half a mole of $H_2$ gas.
Statement $II$: Four $g$ of propyne reacts with $NaNH_2$ to liberate $NH_3$ gas which occupies $224 \ mL$ at $STP$.
In the light of the above statements,choose the most appropriate answer from the options given below:
DifficultJEE MAIN 2025
View SolutionThe following reaction is an example of a ....... reaction: $CH_2Br-CH_2Br + 2KOH (alc.) \xrightarrow{\Delta} CH \equiv CH + 2KBr + 2H_2O$
$Ca + C$ $\xrightarrow[\Delta ]{} A$ $\xrightarrow{H_2O} B$ $\xrightarrow{\text{cyclic polymerisation}} C$
Product $B$ and $C$ are respectively
Product $B$ and $C$ are respectively
Medium
View SolutionIdentify the alkyne formed by the reaction of calcium carbide with water.
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