In the reaction, `R--=-Roverset(Birch)underset(reduction)rarr` source of two H atoms which are added to alkyne to give trans-alkene is:

Which of the following reactions would give trans-alkene ? .

The reduction reaction R-COCl overset(H_2//Pd//BaSO_4)underset("xylene")to RCHO is known as

Birch reduction : Birch reduction involves controlled reduction of alkynes & atomic compounds in the preseance of alkali metals & alcohol. It provides a method to sterospecifically prepare alkenes of E- configuration R - C -= C -R overset(M,EtOH)to The characteristic type of reaction of alkynes is electrophilic addition reaction like alkenes. The alkynes show various reactions such as halagenation, hydration, hydrogenation etc... 0.40 5g sample of hydrocarbon occupies 229.54ml at 100^(@)C & 1 atm pressure. It decolouses KMnO_4 & Br_2 water. When it reacts with dil. H_2SO_4 under appropriate conditions methyl ethyl, ketone is formed The molecular formula of the hydrocarbon is

Birch reduction : Birch reduction involves controlled reduction of alkynes & atomic compounds in the preseance of alkali metals & alcohol. It provides a method to sterospecifically prepare alkenes of E- configuration R - C -= C -R overset(M,EtOH)to The characteristic type of reaction of alkynes is electrophilic addition reaction like alkenes. The alkynes show various reactions such as halagenation, hydration, hydrogenation etc... 0.40 5g sample of hydrocarbon occupies 229.54ml at 100^(@)C & 1 atm pressure. It decolouses KMnO_4 & Br_2 water. When it reacts with dil. H_2SO_4 under appropriate conditions methyl ethyl, ketone is formed The hydrocarbon is

Birch reduction : Birch reduction involves controlled reduction of alkynes & atomic compounds in the preseance of alkali metals & alcohol. It provides a method to sterospecifically prepare alkenes of E- configuration R - C -= C -R overset(M,EtOH)to The characteristic type of reaction of alkynes is electrophilic addition reaction like alkenes. The alkynes show various reactions such as halagenation, hydration, hydrogenation etc... 0.40 5g sample of hydrocarbon occupies 229.54ml at 100^(@)C & 1 atm pressure. It decolouses KMnO_4 & Br_2 water. When it reacts with dil. H_2SO_4 under appropriate conditions methyl ethyl, ketone is formed The hydrocarbon exists in (structural isomer)

In the reaction (CH_(3))_(2)CH-underset(CH_(3))underset(|)(CH)-overset(+)S(CH_(3))_(2)Broverset(Heat)rarr Which of the following alkenes is formed in the largest amount ?

In the conversion of alkyne to trans-alkene by Birch reduction using alkali metals (such as Na or K ) in liquid NH_3 and alcohol ( MeOH or EtOH ), R - -= - R overset(Na +liq. NH_(3))underset(+EtOH)rarr the mechanism takes place in the formation of intermediate species in the following sequence:

In the conversion of alkyne to trans-alkene by Birch reduction using alkali metals (such as Na or K ) in liquid NH_3 and alcohol ( MeOH or EtOH ), R - -= - R overset(Na +liq. NH_(3))underset(+EtOH)rarr the mechanism takes place in the formation of intermediate species in the following sequence: