Chemical Changes vs Physical Changes Quiz

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Questions and Answers

What is the main difference between a physical change and a chemical change?

Physical changes do not produce new substances, while chemical changes involve the formation or breaking of chemical bonds. (correct)
Physical changes involve the formation or breaking of chemical bonds, while chemical changes do not.
Physical changes always involve a change in color or temperature, while chemical changes do not.
Physical changes produce new substances, while chemical changes do not.

Which of the following is an example of a chemical change?

Cutting a piece of paper
Melting ice cubes
Burning coal (correct)
Dissolving sugar in water

What is a chemical bond?

A process that separates atoms from each other
A force that holds atoms together in a molecule (correct)
A mixture of two or more substances
A change in the physical properties of a substance

Which of the following is NOT a sign that a chemical change has occurred?

Change in color due to the addition of food coloring (B) Signup and view all the answers

What is the fundamental difference between a mixture and a compound?

A mixture can be separated by physical means, while a compound cannot. (B) Signup and view all the answers

What is the significance of the formation or breaking of chemical bonds?

It changes the chemical properties of the substance, resulting in a new substance. (C) Signup and view all the answers

What is the primary evidence that a chemical change has occurred during the burning of charcoal?

The production of a gas molecule called carbon dioxide (C) Signup and view all the answers

Which of the following is NOT considered a chemical change?

Changing the color of tree leaves (B) Signup and view all the answers

What is the purpose of the arrow in a chemical equation?

To indicate the direction of the reaction (D) Signup and view all the answers

What is the law of conservation of mass?

Matter is neither destroyed nor created during a chemical reaction, but rather transforms from one form to another (D) Signup and view all the answers