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Q.

The incorrect statement(s) concerning the structures E, F and G is (are)

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a

 E, F and E, G are tautomers 

b

F and G are geometrical isomers

c

E, F and G are resonance structures

d

F and G are not diastereomers 

answer is A.

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Detailed Solution

E and F, and E and G involve the migration of a proton from carbon atom to the adjacent atom. These are keto-nol tautomers.

F and G are cis- and trans- isomers and thus constitute geometrical isomersF and G are not diastereomers. The latter are optical isomers that are not mirror images. 

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