Which of the following provides the best evidence that a chemical reaction has taken place? A Water, when boiled, evaporates and turns into vapor. B Sugar dissolves completely when added to water. A liquid becomes a solid when heat is removed. Two liquids are mixed, and a solid substance forms. D
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
D. Two liquids are mixed, and a solid substance forms.
This evidence provides the best evidence that a chemical reaction take place.
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