question_answer

The correct priorities for the substituents shown below, according to the E-Z sequence rule is

I. \[-CN\]

II. \[-CBr{{\left( C{{H}_{3}} \right)}_{2}}\]

III. \[-COOH\]

IV. \[-C{{H}_{2}}-\overset{O}{\mathop{\overset{\parallel }{\mathop{C}}\,}}\,-OC{{H}_{3}}\]

V. \[-\overset{O}{\mathop{\overset{\parallel }{\mathop{C}}\,}}\,-H\]

A) II, III, V, I, IV                

B) V, II, I, IV, III

C) III, Iv, I, II, V                

D) II, V, I, IV, III

Correct Answer: A

Solution :

[a]                                    Arrange (NNN), (BrCC), (OOO), (CHH), (OOH) in increasing atomic number. The order is ii, iii, v, i, iv.