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IUPAC Nomenclature and Structural Isomerism
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Counting structural isomers
NEET level
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Difficulty 1 of 3
nm171
How many structural isomers are possible for dichlorobenzene,
C
X
6
H
X
4
Cl
X
2
?
A
2
B
4
C
6
D
3
Answer: D
Two substituents on a benzene ring can be 1,2 (ortho), 1,3 (meta) or 1,4 (para). Total 3.
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