What is the increasing order of reactivity of the following in an E2 reaction with ethanolic KOH solution?

Question

What is the increasing order of reactivity of the following in an E2 reaction with ethanolic KOH solution? <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/5aaf7c5670a6693f48bfa1919aef9f41-.jpeg" /> (A) I < II < III < IV (B) I < II < IV < II (C) III < I < II < IV (D) IV < III < II < I

Tardigrade Admin · Accepted Answer

(III) is most reactive as it has most acidic P-H as well as it gives resonance stabilized alkene. Next to (III) is (IV) as it is tertiary. (I) is less reactive than (II) because (I) gives less substituted alkene.

Q. What is the increasing order of reactivity of the following in an $E_{2}$ reaction with ethanolic $K O H$ solution?

$I < II < III < I V$

$I < II < I V < II$

$III < I < II < I V$

$I V < III < II < I$

(III) is most reactive as it has most acidic P-H as well as it gives resonance stabilized alkene. Next to (III) is (IV) as it is tertiary. (I) is less reactive than (II) because (I) gives less substituted alkene.

Q. What is the increasing order of reactivity of the following in an E2​ reaction with ethanolic KOH solution?

I<II<III<IV

I<II<IV<II

III<I<II<IV

IV<III<II<I

(III) is most reactive as it has most acidic P-H as well as it gives resonance stabilized alkene. Next to (III) is (IV) as it is tertiary. (I) is less reactive than (II) because (I) gives less substituted alkene.

Q. What is the increasing order of reactivity of the following in an $E_{2}$ reaction with ethanolic $K O H$ solution?

$I < II < III < I V$

$I < II < I V < II$

$III < I < II < I V$

$I V < III < II < I$