This article explains the definition of Hydrological Cycle, the processes involved in it and its impact on the environment. It involves the exchange of energy that results in change of temperature and influences the climate of a place. The process involves evaporation, condensation, precipitation and Collection. The hydrogen bond in water is the force of attraction among the hydrogen atom and the oxygen atom. This bond governs various properties of the water such as melting point, boiling point, state of water, density, polarity and molecular weight.