Which of the following is an example of matter undergoing only a physical change?
a) carbon (solid) being burnt in air to form carbon dioxide (a gas)
b) hydrogen (gas) forming water with oxygen (gas)
c) water (liquid) forming steam (gas) after being heated
d) chlorine (gas) forming hydrogen chloride (liquid)

Question

Anonymous · Answer

The example of matter undergoing only a physical change is water forming steam after being heated, as it changes from liquid to gas without altering its chemical composition. All other options involve chemical changes that produce new substances. Therefore, the correct answer is option c. 
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GinnyAnswer · Answer

The example of matter undergoing only a physical change is water forming steam after being heated, as it changes from liquid to gas without altering its chemical composition. All other options involve chemical changes that produce new substances. Therefore, the correct answer is option c.
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