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Arrange the following : (i) In decreas...

Arrange the following :
(i) In decreasing order of pKb values :
`C_(2)H_(5)NH_(2), C_(6)H(5)NHCH_(3), (C_(2)H_(5))_2NH` and `C_(6)H_(5)NH(2)`
(ii) In increasing order of basis strength :
(a) Aniline , p-nitroaniline and p-toluidine
(b) `C_(6)H_(5)NH_(2), C_(6)H_(5)NHCH_(3), C_(6)H_(5)CH_(2)NH_(2)`
(iii) In decreasing order of basis strength:
`C_(6)H_(5)NH_(2), C_(6)H_(5)NH(CH_(3))_(2), (C_(2)H_(5))_(2)NH, CH_(3)NH_(2)`
(iv) Decreasing order of basis strength in gas phase :
`C_(2)H_(5)NH_(2), (C_(2)H_(5))_(2)NH, (C_(2) H_(5))_(3)N and NH_(3)`
(v) Increasing order of boiling point :
`C_(2)H_(5)OH, (CH_(3))_(2)NH, C_(2)H_(5)NH_(2)`.

Text Solution

Verified by Experts

(i) `C_(6)H_(5)NH_(2) gt C_(6)H_(5)NHCH_(3) gt C_(2)H_(5)NH_(2) gt (C_(2)H_(5))_(2)NH`
(ii) (a) p-nitroaniline lt aniline lt p-toluidine
(b) `C_(6)H_(5)NH_(2) lt C_(6)H_(5)NHCH_(3) lt C_(6)H_(5)CH_(2)NH_(2)`
(iii) `(C_(2)H_(5))_(2)NH gt CH_(3)NH_(2) gt C_(6)H_(5)N(CH_(3))_(2) gt C_(6)H_(5)NH_(2)`
(iv) `(C_(2)H_(5))_(3)N gt (C_(2)H_(5))_(2)NH gt C_(2)H_(5)NH_(2) gt NH_(3)`
(v) `(CH_(3))_(2)NH lt C_(2)H_(5)NH_(2) lt C_(2)H_(5)OH `
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