An alkene 'A' of molecular mass '28u' on treatment with bromine gives a product 'B' The Compound 'B' on further dehalogenation with zinc gives back 'A' Give the structurese of 'A' and 'B' and also the sequence of reactions.

Give the structures of A and B in the following sequence of reactions

(B) on treatment with Zn//HCl gives :

An alkali metal 'A' gives a compound B (molecular mass = 56) on reacting with water. The compound 'B' gives a soluble compound 'C' on treatment with aluminium oxide. Identify A, B and C and give the reactions involved.

A compound on dehydrohalogenatio with alcoholic KOH gives alkyne but on dehalogenation with zinc dust gives alkene. The compound

An alkali metal A gives a compound B (molecular mass = 40) on reacting with water. The compound B gives a soluble compound C on treatment with aluminium oxide. Identify A, B and C and give the reactions involved.

Compound 'A' of molecular formula C_(4)H_(10)O on treatment with Lucas reagent at room temperature gives compound 'B'. When compound 'B' is heated with alcoholic KOH, it gives isobutan. Compound 'A' and 'B' are respectively :