12 Questions
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.
Which of the following is an example of a chemical change?
Burning coal
What is a chemical bond?
A force that holds atoms together in a molecule
Which of the following is NOT a sign that a chemical change has occurred?
Change in color due to the addition of food coloring
What is the fundamental difference between a mixture and a compound?
A mixture can be separated by physical means, while a compound cannot.
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.
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
Which of the following is NOT considered a chemical change?
Changing the color of tree leaves
What is the purpose of the arrow in a chemical equation?
To indicate the direction of the reaction
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
What is the ratio of carbon (C) atoms to oxygen (O) atoms in a carbon dioxide (CO2) molecule?
1:2
What is the purpose of a chemical equation?
All of the above
Test your knowledge on the differences between chemical changes and physical changes in matter. Learn about how new materials are formed through chemical bonding and the properties that change in each type of transformation.
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