Question

The decreasing order of priority for the following functional groups is:
I. $-COOH$ II. $-S{O}_{3}H$ III. $-COOR$ IV. $-COCl$

• A. $\left(IV\right)>\left(Ill\right)>\left(II\right)>\left(I\right)$
• B. $\left(I\right)>\left(II\right)>\left(lll\right)>\left(IV\right)$
• C. $\left(II\right)>\left(I\right)>\left(lll\right)>\left(IV\right)$
• D. $\left(IV\right)>\left(Ill\right)>\left(I\right)>\left(II\right)$

Answer 1

Answer: (B)

$\left(I\right)>\left(II\right)>\left(lll\right)>\left(IV\right)$

The decreasing priority of functional groups is

$-COOH>-S{O}_{3}H>-COOR>-COCl$

$-COOH$ group is always greater priority than $-S{O}_{3}H,-COOR,-COCl$.

So the answer is $B$.