(i) Write the structure of major alkene formed by `beta`-elimination of 2, 2, 3-trimethyl-3- bromopentane with sodium ethoxide in ethanol.
(ii) Which one of the compounds in the following pairs is chiral ?

(iii) Identify (A) and (B) in the following :

OR
How can you convert the following ?
(i) But-1-ene to 1-iodobutane
(ii) Benzene to acetophenone
(iii) Ethanol to propanenitrile

Explanation

(i) `CH_(3) -CH=overset(overset(CH_3)|)C-overset(overset(CH_3)|)C-underset(underset(CH_3)|)CH_3`
(ii)
OR
(i) But-1-ene to 1-iodobutane
`CH_(3) -underset("But-1-ene")(CH_(2)) -CH=CH_(2) overset("HBr")underset("Peroxide")(to)CH_(3) - CH_(2) -CH_(2) -CH_(2)Br overset("nal")(to) underset("1-Iodobutane")(CH_(3) CH_(2) CH_(2) CH_(2) I) `
(ii) Benzene to acetophenone

(iii) Ethanol to propanenitrile
`underset("Ethanol")(CH_(3) CH_(2) OH) overset(PCI_(3)) (to)CH_(3) CH_(2) CI overset("KCN")(to) underset("Propanenitrile")(CH_(3) CH_(2) CN )`