Arrange following compounds in decreasing order of reactivity for hydrolysis reaction

Step-by-step solution

Reactivity ∝ electron deficiency at C-atom of - C O group or Reactivity ∝ 1 S t a b i l i t y o f p o l a r s t r u c t u r e Thus electron withdrawing group increases reactivity and electron donating group decreases reactivity. Hence the order is 2 > 4 > 1 > 3.