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Which of the following names are incorrect .
Methylaniline
Propanediamine
N-Penthy-2-Propylamine
m-Xylidine .
A. (i),(ii)
B. (i),(ii),(iii)
C. (i),(ii),(iii),(iv)
D. (i),(iii),(iv)

1 Answer

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Correct Answer - C
If methy1 `(CH_(3))` is bonded to the amino N the correct name is N-methylaniline If it is bonded to the ring the correct name is o-m-or p- toluidine or 2-3,3- or 4- methylbenzenamine (ii) The correct name must specify the positions of the amino groups the full name is either propane -1,2 -or 1,3-diamine (iii) The larger alky1 group is considered the parent amine thus correct name is N-isopropylpentan-1 amine (iv) With three substitutents on the ring o-m-and p- designations are inadequate Xylidines are aminobenzenes with two methy1 groups bonded in various positions to the ring These positions must be specified For example if the methy1 groups are ortho to each other common name is 3,4-xylidine where the numbers refer to the positions of the methy1 groups Its `IUPAC` name is 3,4-dimethy ibenzenamine and it can also be named as 3,4-dimethylaniline .

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