Which of the following must occur for there to be a chemical reaction?
A) There is a change of color.
B) There is a change of state.
C) A gas is produced.
D) Bonds break and/or new ones are formed.
E) The reaction mixture increases in temperature.

Question

Quizplus · Accepted Answer

For a chemical reaction to occur, bonds between atoms in the reactants must break and new bonds must form to create the products. This is a fundamental requirement for any chemical change, distinguishing it from physical changes where no bonds are broken or formed. Changes in color, state, gas production, and temperature are common indicators of chemical reactions but are not requirements for all chemical reactions.

Which of the Following Must Occur for There to Be