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Which of the following is a chemical reaction?

by kindaichi
Tags: chemical, reaction
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kindaichi
#1
Oct21-06, 11:00 AM
P: 25
I am confuse here.Here is another question from my test.

Which of the following is a chemical reaction?

I.A piece of gold is being heated to melt it
II.A ball is being blown
III.A piece of paper is burnt
IV.A piece of sodium is out into a beaker of water

A.I and II
B.III and IV
C.I,II,and IV
D.I,II,III,and IV

I am absolutely clueless about this question.Can a good samaritan help out here?
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Smith4046
#2
Oct21-06, 12:05 PM
P: 18
Type in "chemical and physical changes" at your favorite search engine. That should give you mucho leads, including the differences between the two.

Best of luck.

Steve
Stevedye56
#3
Oct21-06, 12:06 PM
P: 398
What is a chemical reaction defined as? What is a physical change defined as? The answer is quite simple if you know the definitions, if not its more complicated.


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