A) functional
B) chain
C) positional
D) stereo
Correct Answer: B
Solution :
\[2-\]pentanone and 3-methyl-2-butanone are chain isomers because they differ in carbon skeleton. \[\underset{2-\text{pentanone}}{\mathop{C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}COC{{H}_{3}}}}\,\] \[\underset{3-\text{methyl}\,-2-\text{butanone}}{\mathop{\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C{{H}_{3}}CH}}\,}}\,.COC{{H}_{3}}}}\,\]
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