Q402
Which of the following is not a chemical reaction?
A.
Burning of paper
B.
Digestion of food
C.
Conversion of water into steam
AnswerD.
Burning of coal
Answer: Option C
Solution
Answer: Option C
Solution:
The conversion of water into steam is an example of a physical change, where the state of the matter changes without changing its composition. A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, colour, volume and density.