2-Bromo pentane when treated with acl. `KOH` yields a mixture of three alkenes `(A),(B),(C)`. Indentity them and find out which is predominant ?

2-bromopentane with alcoholic KOH yields a mixture of three alkenes. Which of the following alkene is predominant?

A Grignard regane t (A0 and a haloalkene (B) react together to give (C) compound (C) on heating with KOH yields a mixture of two geometrical isomers, (D) and (E) of which (D) predominates. (C) gives 1- bromo 3- phenyl propane on reaction with Hbr in the presence of a peroxide. Give teh structures of (A), (B) , and (C) and the configuratins of (D) and (E) .

(E)-2- chloro-2-butene when treated with alcoholic KOH gives which of the following as major product

A Grignard reagent (A) and a haloalkene (B) react together to give (C) . Compound (C) on heating with KOH yeilds a mixture of two geometrical isomers (D) and € of which (D) predominates . Compound (C) on reaction with HBr in presence of a peroxide gives 1-bromo-3- phenylpropane. Give the structures of (A), (B) and (C) and configurations of (D) and (E).

An alkene (A) having formula C_4H_8 , on ozonolysis, gives propanal & methanal. A reacts with HBr to produce a compound of molecular formula, C_4H_9Br . This compound, when heated with alcoholic KOH, produces another alkene (B) which is isomeric with A. Identify the alkenes (A) and (B).

When neopentyl alcohol is treted with H_(2)SO_(4) , a mixture of two alkenes (85:15) is formed. Which statement (s) is /are correct about these alkenes ?