Which of the following is a pair of metamers?

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Question

(B) Metamerism is a type of structural isomerism that arises due to the different distribution of alkyl groups on either side of the same polyvalent f

Vedclass · Accepted Answer

$CH_3-N(C_2H_5)-C_2H_5$ and $CH_3-N(CH_3)-CH_2-CH_2-CH_3$

Vedclass · Answer

(B) Metamerism is a type of structural isomerism that arises due to the different distribution of alkyl groups on either side of the same polyvalent functional group (such as $-O-$,$-S-$,$-NH-$,$-CO-$,$-N < $).
$1.$ Option $(A)$ shows functional isomers (ester and carboxylic acid).
$2.$ Option $(B)$ shows metamers because the alkyl groups attached to the nitrogen atom are different: $N,N$-diethylmethylamine (groups: $CH_3, C_2H_5, C_2H_5$) and $N,N$-dimethylpropylamine (groups: $CH_3, CH_3, C_3H_7$).
$3.$ Option $(C)$ shows position isomers.
$4.$ Option $(D)$ shows chain isomers.
Therefore,the correct pair of metamers is given in option $(B)$.

Column $I$ (Compounds)	Column $II$ (Relation)
$(i)$ $CH_3-CH_2-C(CH_3)_2-Cl$ and $(CH_3)_3C-Cl$	$(P)$ Homologues
$(ii)$ $C_6H_5-O-CH_2-CH_3$ and $C_6H_5-O(CH_3)-CH_3$ (ortho-methylanisole)	$(Q)$ Functional group isomers
$(iii)$ $C_6H_5-O-CH_3$ and $2-methylphenol$	$(R)$ Metamers
$(iv)$ $CH_3-CH(CH_3)-CH_2-OH$ and $(CH_3)_3C-OH$	$(S)$ Position isomers

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