Ortho effect is special type of effect that is shown by o-subsituents .This ortho-effect operates at the benzoic acids irrespective of the polar type. Nearly all o-substituted benzoic acid are stronger than benzoic acid. Benzoic acid is a resonance stabilised and so the carboxyl group is coplaner with the ring. An o-subsituent tends to prevent this coplanarity. What is the order of K_(a) of following compounds ?

Ortho effect is special type of effect that is shown by o-subsituents

1.	Ortho effect is special type of effect that is shown by o-subsituents .This ortho-effect operates at the benzoic acids irrespective of the polar type. Nearly all o-substituted benzoic acid are stronger than benzoic acid. Benzoic acid is a resonance stabilised and so the carboxyl group is coplaner with the ring. An o-subsituent tends to prevent this coplanarity. What is the order of K_(a) of following compounds ?
Answer» `I gt II gt III gt IV gt V` `II gt I gt III gt IV gt V` `V gt VI gt III gt I gt II` `III gt II gt I gt V gt IV` ANSWER :A