Assertion 2-butyne on controlled hydrogenation with Pd / CaCO 3 in presence of PbO gives cis- 2-butene. Reason Hydrogenation occur at the surfaces of metal containing adsorbed hydrogen. of metal containing adsorbed hydrogen.

Question

Assertion 2-butyne on controlled hydrogenation with Pd / CaCO 3 in presence of PbO gives cis- 2-butene. Reason Hydrogenation occur at the surfaces of metal containing adsorbed hydrogen. of metal containing adsorbed hydrogen. (A) Both Assertion and Reason are true and Reason is the correct explanation of Assertion (B) Both Assertion and Reason are true and Reason is not the correct explanation of Assertion (C) Assertion is true but Reason is false (D) Both Assertion and Reason are false

Tardigrade Admin · Accepted Answer

Poisoning by PbO prevent further hydrogenation of alkene to alkane.

Q. Assertion $2$ -butyne on controlled hydrogenation with $P d / C a C O_{3}$ in presence of $P b O$ gives cis- $2$ -butene.
Reason Hydrogenation occur at the surfaces of metal containing adsorbed hydrogen. of metal containing adsorbed hydrogen.

Both Assertion and Reason are true and Reason is the correct explanation of Assertion

Both Assertion and Reason are true and Reason is not the correct explanation of Assertion

Assertion is true but Reason is false

Both Assertion and Reason are false

Poisoning by $P b O$ prevent further hydrogenation of alkene to alkane.

Q. Assertion 2-butyne on controlled hydrogenation with Pd/CaCO3​ in presence of PbO gives cis- 2-butene. Reason Hydrogenation occur at the surfaces of metal containing adsorbed hydrogen. of metal containing adsorbed hydrogen.