A) chain isomerism
B) tautomerism
C) metamerism
D) optical isomerism
Correct Answer: C
Solution :
Key Idea: (i) Chain isomerism: The two isomers have different chain lengths. (ii) Tautomerism: It is characteristic of compounds having labile hydrogen. It is dynamic isomerism. (iii) Optical isomerism: It is possible in compounds having at least one asymmetric carbon atom. (iv) Metamerism: It is shown by compounds which have at two alkyl groups attached to same functional group. Ethers are R-O-R OR R -0 -R. Since they have two alkyl. groups in their structure. So they show metamerism.
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