Question

Which of the following statements holds true for a chemical change? In a chemical change, no new substance is formed. In a chemical change, a substance changes its phase. In a chemical change, the molecular structure of a substance changes. In a chemical change, one substance dissolves into another. NextReset

Answer 1

In a chemical change, the molecular structure of a substance changes. I think this is right. I hope this helps.

Answer 2

Answer: In a chemical change, the molecular structure of the substance changes.

Explanation:

Chemical change is the change in which chemical composition of the substance changes by rearrangement of atoms. The molecular structure changes due to change in atoms.

Example: $H_2+O_2\rightarrow 2H_2O$

Physical change is a change in which only the physical properties such as size, shape etc change and there is no rearrangement of atoms.

Example: melting of ice

$H_2O(s)\rightarrow H_2O(l)$