Test Bank For Chemistry The Molecular Nature of Matter and Change, 9th Edition, Martin Silberberg, Patricia Amateis Chapter 1-24 Answers are at the End of Each Chapter Chapter 1
Student name:__________ 1) Which one of the following is a “substance” in the sense of the word as used in your textbook? A) Air B) Tap water C) Sea water D) Water E) Toothpaste
2)
Select the best statement. A) Physical changes may be reversed by changing the temperature. B) Physical changes alter the composition of the substances involved. C) Physical properties are not valid characteristics for identifying a substance. D) Physical properties are mostly extensive in nature. E) Physical changes are usually accompanied by chemical changes.
3)
Select the best statement.
A) Chemical changes provide the only valid basis for identification of a substance. B) Chemical changes are easily reversed by altering the temperature of the system. C) Chemical changes always produce substances different from the starting materials. D) Chemical changes are associated primarily with extensive properties. E) Chemical changes are accompanied by changes in the total mass of the substances involved.
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