Question

Which of the following processes involves only physical change? A. decay B. sublimation C. digestion D. combustion

Answer 1

`\huge \boxed{\mathrm{B. \ sublimation}}`

Step-by-step explanation:

Sublimation is a process that involves only a physical change. Sublimation is a change in a state of matter from solid state to gas state. An example of sublimation can be dry ice, from its solid state to gas state.

Answer 2

B. Sublimation
Sublimation is the change of a liquid from the liquid state to the gas state. That’s why it’s only involves a physical change. Also, you can go back to the liquid stage.