Question

In which state will water exist at -2 degree Celsius. Explain. .

Answer 1

Water is the most abundant molecule on the Earth's surface, covering about 71% of the surface of the planet. The word water is usually reserved for the substance in its liquid state, ice when in its solid state, and water vapor or steam when in its gaseous state. It is a small molecule with some interesting and unusual physical properties that arise as a consequence of its charged bipolar nature and the hydrogen bonds formed between molecules of water which cause them to stick together. Both create surface tension. As a fluid, water is nearly a universal solvent, meaning that many (though not all) other substances can be dissolved in water. Water has a high specific heat, which means that it does not change temperature easily -- indeed, we define a unit of heat energy as a calorie, the amount of heat required to raise one cubic centimeter of water by exactly one degree Celsius. We define 100oC as the temperature at sea level of the boiling point of water (when it changes from the liquid to gaseous state). The temperature at its freezing point, when water changes from the liquid state to the solid state (ice), is defined as 0o C. Water is most dense (heaviest) at 4o C. 

Answer 2

Ice oviously because water freezes at the temperature of 0 degrees