Which of the following is an example of a physical change? In this example, there is no change in chemical composition of matter. A: Coal changing into coal ash on burning B: Preparing a sweet drink by mixing sugar in water C: White washing walls using a solution of lime and water D: Mixing salt and lemon juice in a beaker

Explanation

Preparing a sweet drink by dissolving sugar in water is a reversible physical change because the chemical composition of the sugar and water remains unchanged. The other options involve chemical reactions that form distinctly new chemical substances.