EVERYDAY SCIENCE

Detailed explanation-1: -Formation of water from hydrogen and oxygen is a combination reaction because hydrogen and oxygen are combining to form single product. The reaction occurs as follows: 2H2(g)+O2(g)→2H2O(l)

Detailed explanation-2: -Water is made up of hydrogen and oxygen, and it exists in gaseous, liquid, and solid states. Water is one of the most plentiful and essential compounds, occurring as a liquid on Earth’s surface under normal conditions, which makes it invaluable for human uses and as plant and animal habitat.

Detailed explanation-3: -The arrow in a chemical reaction means the direction in which the reaction occurs. If we use the scientific names of the elements of the equation, it would look something like this. Here we can see that hydrogen and Oxygen are the reactants, and they combine to form a chemical compound H2O, i.e., water.

Detailed explanation-4: -When molecular hydrogen (H2) and oxygen (O2) are combined and allowed to react together, energy is released and the molecules of hydrogen and oxygen can combine to form either water or hydrogen peroxide.

Detailed explanation-5: -The reactants for photosynthesis are light energy, water, carbon dioxide and chlorophyll, while the products are glucose (sugar), oxygen and water. The reactant water molecule is taken up from the soil by the roots for splitting and producing oxygen. Water is also a product of photosynthesis.