JEE Main 2015 · 11 Apr · Shift 1 · Chemistry Q52

ChemistrySingle correct+4 / -1Question 52 of 90

Which of the following pairs of compounds are positional isomers ?

\ce{CH3-CH2-CH2-CH2-CHO}

and

\ce{CH3-CH2-CH2-CO-CH3}

\ce{CH3-CH2-CH2-CO-CH3}

and

\ce{CH3-CH(CH3)-CH2-CHO}

\ce{CH3-CH2-CH2-CO-CH3}

and

\ce{CH3-CH2-CO-CH2-CH3}

\ce{CH3-CH2-CO-CH2-CH3}

and

\ce{(CH3)2CH-CH2-CHO}

Answer and worked solution

Official answer: C

Pentan-2-one and pentan-3-one have the same skeleton and functional group but differ in the position of C=O: positional isomers.

JEE Main 2015 · 11 Apr · Shift 1, Chemistry question 52