What is Pure Substance? Pure substances are substances that are made up of only one kind of particle and have a fixed or constant structure. Pure substances are further classified as …

A substance transforms from a solid to a gas by sublimation without ever going through a liquid phase. A common example of sublimation is the dry ice, heavy CO2. 2. How is sublimation …

The substance is acid if the number of hydrogens has decreased (donates hydrogen ions). The substance is the base if the number of hydrogens has increased (accepts hydrogen ions). A …

What is an Element? An element is a pure substance consisting of only one type of atom which all have the same numbers of protons in their nuclei. The question of the conceptual nature of the …

What is Solute? A substance that is dissolved in a solution is called a solute. In fluid solutions, the amount of solvent present is greater than the amount of solute. One best example of solute in …

What are Changes of State? A change of state is a physical change in a matter. They are reversible changes and do not involve any changes in the chemical makeup of the matter. …

What is the SI unit of calorific value? Calorific value reflects the amount of energy emitted when a fuel or substance undergoes a complete combustion process. This term is usually used in …

Melting refers to the phase change of a substance from a solid state to a liquid state. This is a phase change phenomenon which means in this process, a substance is transformed from …

The primary distinction between Physical and Chemical Properties is that when a chemical reaction occurs on a substance, its molecular structure changes. Whereas a substance’s …

What is the melting point? The temperature at which a solid becomes a liquid due to enough heat. For a given substance, its solid form’s melting point is the same as its liquid form’s freezing …