The present work pertains to kinetic behavior and mechanism of hydrolysis of Iso-amyl iodide. The base employed was NaOH. Solvent effect on the kinetics of Iso-amyl iodide has been investigated in alkaline and neutral medium in [EtOH-H2O] mixtures up to 60% v/v in the temperature range of 550C-650C in alkaline and 500C-550C in neutral media respectively. The velocity in the first order process depends upon the concentration of halide molecule (i.e. Iso-amyl iodide). In presence of finite concentration of hydroxyl ions the total order of reaction is two while in absence of alkali, the order of the reaction is unity. The reaction velocity decreases with increase in the ionic strength of the medium. In the absence of sodium hydroxide the velocity of first order process is greatly increased on increasing the di-electric constant of the medium. The general form of rate expression is written as : [ ] K [RX][OH ] K' [RX] dt d RX 2 1 - = - + . Activation parameters were also determined.