One among the following pairs of compounds are not isomers ?

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${({CH}_{3})}_{2} C H - O - C_{2} H_{5} a n d {(C H_{2})}_{2} - O - C_{2} H_{5}$

${CH}_{3} {CH}_{2} {CO}_{2} H and {CH}_{3} {CO}_{2} {CH}_{3}$

${CH}_{3} {COCH}_{3} and {CH}_{3} {CH}_{2} {CH}_{2} OH$

${CH}_{3} {CH}_{2} {NO}_{2} and {NH}_{3} {CH}_{2} COOH$

answer is C.

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Detailed Solution

In given options 1, 2, 4 having same M.F but diff in structure where as in option “3” i.e. ${CH}_{3} {COCH}_{3} and {CH}_{3} {CH}_{2} {CH}_{2} OH$ having differ in structure but not having same M.F. So it not isomers.

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