Which of the following is an example of a chemical change?
A)coffee brewing
B)water boiling
C)nails rusting
D)salt dissolving in water
E)freezing of water

Question

Quizplus · Accepted Answer

Nails rusting involves a chemical reaction between iron and oxygen in the presence of moisture, leading to the formation of iron oxide (rust). This process cannot be easily reversed and is therefore a chemical change.

Note: A is also a possible answer as coffee brewing involves a chemical reaction between coffee beans and hot water that results in the extraction of flavor compounds, but it can also be considered a physical change as the coffee can still be separated into its original components (water and coffee grounds).

Which of the Following Is an Example of a Chemical