Statement I: Water is a high boiling point liquid. Statement II : Hydrogen bonding in water is responsible for high boiling point of water.

Statement I is true as water possesses an unusually high boiling point (100°C) compared to other molecules of similar size and molecular weight, such as hydrogen sulfide (H2S). Statement II is also true and provides the correct explanation for this phenomenon. Water molecules are highly polar due to the significant electronegativity difference between oxygen and hydrogen. This polarity allows for the formation of strong intermolecular hydrogen bonds, which are much more powerful than the London dispersion forces or simple dipole-dipole interactions found in similar hydrides. These hydrogen bonds create strong cohesive forces that require a substantial amount of thermal energy to overcome, thereby elevating the boiling point significantly. Consequently, water remains a liquid at temperatures where similar molecules exist as gases.