An alkene `C_(4)H_(8)` reacts with HBr both in the presence and absence of peroxide to give the same product. Identify the alkene.

a. Write the products of the reductive and oxidative ozonolyses of mesitylene. b. Give the structure of the alkene (C_(4)H_(8)) which when treated with dil. H_(2)SO_(4) give C_(4)H_(10)O , which is non - resolvable. c. Give the structure of the alkane (C_(4)H_(8)) which adds HBr in the presence and absence of peroxide to give the same product C_(4)H_(9)Br. d. Arrange the following in the decreasing order of their reactivity towards alkenes : i. HCI,ii.HBr, iii. HI,iv. HF.

Give the structures of (A),(B) and (C)( explanation is not required ). i. (A)(C_(4)H_(8)) that adds on HBr in the presence and in the absence of peroxide to give the same product, C_(4)H_(9)Br . ii. (B)(C_(4)H_(8)), which when treated with H_(2)O //H_(2)SO_(4) gives C_(4)H_(10)O that cannot be resolves into optical isomers. iii. (C)(C_(6)H_(12), an optically active hydrocarbon which on catalytic hydrogenation gives an optically inactive compound, C_(6)H_(14))

Give the structures of A & B (explanation are not required) (i) A(C_4 H_8) which adds on HBr in the presence and in the absence of peroxide to give same product. (ii) B(C_4 H_8) which when treated with H_2 O //H_2 SO_4 gives C_4 H_(10)O which cannot be resolved into optical

Reaction of HBr with propene in the presence of peroxide gives :-