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(A) Position isomers have the same molecular formula and same functional group but differ in the position of the functional group on the parent chain.

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$(I), (II)$ and $(VI), (VII)$

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(A) Position isomers have the same molecular formula and same functional group but differ in the position of the functional group on the parent chain.- In $(I)$ $CH_3-CH_2-CH_2-CH_2-OH$ (butan$-1-$ol) and $(II)$ $CH_3-CH_2-CH(OH)-CH_3$ (butan$-2-$ol),the position of the $-OH$ group differs on the same butane chain.- In $(VI)$ $CH_3-O-CH_2-CH_2-CH_3$ ($1$-methoxypropane) and $(VII)$ $CH_3-O-CH(CH_3)-CH_3$ ($2$-methoxypropane),the position of the $-OCH_3$ group differs on the same propane chain.- Therefore,$(I), (II)$ and $(VI), (VII)$ are pairs of position isomers.

Identify the pairs of compounds that represent position isomerism.
$(I)$ $CH_3-CH_2-CH_2-CH_2-OH$
$(II)$ $CH_3-CH_2-CH(OH)-CH_3$
$(III)$ $CH_3-C(OH)(CH_3)-CH_3$
$(IV)$ $CH_3-CH(CH_3)-CH_2-OH$
$(V)$ $CH_3-CH_2-O-CH_2-CH_3$
$(VI)$ $CH_3-O-CH_2-CH_2-CH_3$
$(VII)$ $CH_3-O-CH(CH_3)-CH_3$

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Identify the pairs of compounds that represent position isomerism.$(I)$ $CH_3-CH_2-CH_2-CH_2-OH$$(II)$ $CH_3-CH_2-CH(OH)-CH_3$$(III)$ $CH_3-C(OH)(CH_3)-CH_3$$(IV)$ $CH_3-CH(CH_3)-CH_2-OH$$(V)$ $CH_3-CH_2-O-CH_2-CH_3$$(VI)$ $CH_3-O-CH_2-CH_2-CH_3$$(VII)$ $CH_3-O-CH(CH_3)-CH_3$