In the preparation of alkenes, dehydration of alcohols, dehydrohalogenation of alkyl halides, dehalogenation of vicinal dihalides are called `beta`-elimination reactions

Mention the reagents used in the preparation of alkenes by dehydration, dehydro- halogenation and dehalogenation.

Specific reagent for dehydrohalogenation of alkyl halides to get alkenes is

The elimination of HX from an alkyl halide forms an alkene. Give the order of the elimination reaction

In dehalogenation reaction of dihalides to get alkenes, the dihalide to be taken is

Write a note on elimination reactions of alkyl halides

(A) Ethers are not generally prepared by acid dehydration of 2^@ and 3^@ alcohols (R) dehydration of 29 and 30 alcohols gives alkenes by elimination

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