Respuesta :
A change in the molecular structure is an indication that a substance has undergone a chemical change. Hence, option D is correct.
What is molecular structure?
Molecular geometry, also known as the molecular structure, is the three-dimensional structure or arrangement of atoms in a molecule.
Some signs of a chemical change are a change in colour and the formation of bubbles.
The five conditions of chemical change: colour change, formation of a precipitate, formation of a gas, odour change, temperature change or change in molecular structure.
Hence, option D is correct.
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