(a) Indicate whether the following are `S_(N^(1)),S_(N^(2)),E_(1) " or "E_(2)` reactions.
`(i) CH_(3)CH_(2)CH_(2)CI+I^(-) to`
`(ii) (CH_(3))_(3) CBr+CN^(-)(alc.) to`
`(iii) CH_(3)CH(Br)CH_(3) +OH^(-) (alc.) to`
`(iv) (CH_(3))_(3) C-Br+H_(2)O to`
(b) Give the decreasing order of reactivity of the alkaline hydrolysis of the following alkyl halides toward `(A)S_(N^(1))(B) S_(N^(2))(C)` in pressure of `AgNO_(3).`
`(i) (CH_(3))_(2)C(Br) -C_(2)H_(5) (ii)C_(5)H_(11)Br`
`(iii) C_(2)H_(5)CH(Br)C_(2)H_(5)`
(c) Give the decreasing order reactivity of the alkaline hydrolysis of hte following halides towards `S_(N^(1)) (i) MeCI (ii) PhCH_(2)CI(ii)Ph_(2)CHCI(iii)Ph_(3)C-CI`.
(d) Determine the relative `S_(N^(2))` reactivity with NaCI in aprotic DMSO of the following alkyl halides :
`(A) (i) CH_(3)CHCICH_(2)CH_(3)(ii)CH_(3)CHBrCH_(2)CH_(3)`
`(iii) CH_(3)CHICH_(2)CH_(3)`
`(B) (i) CH_(3)CH(CH_(3))CH_(2)CH_(2)I`
`(ii) CH_(3)CH(CH_(3))CHICH_(3)(iii) CH_(3)CI(CH_(3)) CH_(2)CH_(3)`
(e) Arrange the following in the order of decreasing nucleophilic character:
`H_(2)O,^(-)OH,CH_(3)O^(-), CH_(3)COO^(-)`
(f) Arrange the following in the decreasing order as leaving group in `S_(N)` reaction:
`CH_(3)COO^(-), C_(6)H_(5)O^(-), C_(6)H_(5)SO_(3)^(-), CH_(3)O^(-)`