JEE Main 2022 · 26 Jul · Shift 2 · Chemistry Q73

ChemistrySingle correct+4 / -1Question 73 of 90

The correct decreasing order of priority of functional groups in naming an organic compound as per IUPAC system of nomenclature is

-\mathrm{COOH}>-\mathrm{CONH_2}>-\mathrm{COCl}>-\mathrm{CHO}

-\mathrm{SO_3H}>-\mathrm{COCl}>-\mathrm{CONH_2}>-\mathrm{CN}

-\mathrm{COOR}>-\mathrm{COCl}>-\mathrm{NH_2}>\;\rangle\mathrm{C=O}

-\mathrm{COOH}>-\mathrm{COOR}>-\mathrm{CONH_2}>-\mathrm{COCl}

Answer and worked solution

Official answer: B

IUPAC priority: $\mathrm{-COOH>-SO_3H>-COOR>-COCl>-CONH_2>-CN>-CHO>\ C{=}O>-OH>-NH_2}$ .

Only $\mathrm{-SO_3H>-COCl>-CONH_2>-CN}$ follows it.

(B)

Topics:IUPAC nomenclature

JEE Main 2022 · 26 Jul · Shift 2, Chemistry question 73