JEE CHEMISTRY MCQ: HYDROCARBONS

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Which among the following is Lindlar’s catalyst

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Correct option: B

Pd/BaS{O_4}

CaC{O_3}

in quinoline or xylene

Option B (

Pd/BaS{O_4}

CaC{O_3}

in quinoline or xylene) is correct because it accurately describes Lindlar's catalyst, which is used for the partial reduction of alkynes to cis-alkenes.

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\mathrm{Ca}{\mathrm{C}_2} + {\mathrm{H}_2}\mathrm{O} \to X\xrightarrow{{{\mathrm{O}_3}/\frac{{{\mathrm{H}_2}\mathrm{O}}}{{\mathrm{O}{\mathrm{H}^ + }}}}}\mathrm{HCOOH} + \mathrm{HCOOH},X\;\mathrm{is}

In benzene, there is a delocalisation of π-electrons. Hence, each π-electron is attached by….carbon nuclei. Which statement is false? Assertion (A) In comparison to ethyl chloride, it is not easy to carry outnucleophilic substitution on vinyl chloride.

Reason (R) Vinyl group is an electron donating. If 2-oxopropanal and methanal are obtained by the reductive ozonolysis of compound (A), then the number of

\sigma

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