Arrange reactivity of given carboxylic acids for esterification reaction in decreasing order 1 . HCOOH 2 . C H 3 C H 2 C O O H 3 . 4 .

Step-by-step solution

For esterification reactions these acids can be arranged in decreasing order as follows As ease of esterification depend on steric hindrance on α -carbon of the compound i.e., as steric hindrance increases and tendency to form ester also decreases.