Physical And Chemical Changes Quiz

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Science Education

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Questions: 10 | Attempts: 82,137 | Updated: Feb 27, 2024

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Physical And Chemical Changes Quiz - Quiz

Is chemistry your favorite subject from school? Take up this "Physical And Chemical Changes" quiz to know how well you understand the difference. In this quiz, we’ll be looking at the two scientific topics of physics and chemistry and combining them as we look at the changes that occur when specific scientific reactions occur. Is it a chemical or a physical change? That’s up to you to tell us! All the best. Try to give more correct answers for a perfect score. Do share the quiz with your friends to find out if they know the difference between the terms.

Physical And Chemical Changes Questions and Answers

1.

Classify the following as a physical or chemical change: Tearing a piece of paper into 100 pieces.
- A.
  
  Physical change
- B.
  
  Chemical change
Correct Answer
A. Physical change

Explanation
Tearing a piece of paper into 100 pieces is classified as a physical change because it does not involve any chemical reactions. The paper is still made up of the same material, but its physical form has changed. The bonds between the paper fibers are broken, resulting in smaller pieces of paper, but the chemical composition of the paper itself remains the same.

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2.

Classify the following as a physical or chemical change: Burning a piece of paper.
- A.
  
  Physical change
- B.
  
  Chemical change
Correct Answer
B. Chemical change

Explanation
Burning a piece of paper is classified as a chemical change because it involves a chemical reaction. During the burning process, the paper undergoes a chemical reaction with oxygen in the air, resulting in the formation of new substances such as ash, smoke, and gases. The original composition of the paper is permanently altered, making it a chemical change rather than a physical change where only the physical properties of the substance would be affected.

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41
1
3.

Classify the following as a physical or chemical change: A reaction occurs, and the product(s) is (are) different from what you started with.
- A.
  
  Physical change
- B.
  
  Chemical change
Correct Answer
B. Chemical change

Explanation
A reaction occurring and resulting in a product that is different from the starting material indicates a chemical change. In a chemical change, the arrangement of atoms and molecules is altered, leading to the formation of new substances with different chemical properties. This is in contrast to a physical change, where there is no change in the chemical composition of the substances involved.In a physical change, only a change in their physical state or appearance occurs; no chemical reaction occurs.

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4.

Classify the following as a physical or chemical change: Hammering a nail into a piece of wood.
- A.
  
  Physical change
- B.
  
  Chemical change
Correct Answer
A. Physical change

Explanation
Hammering a nail into a piece of wood is a physical change. The composition and chemical properties of the wood and the nail remain unchanged. The act of hammering only alters the shape and position of the nail within the wood, which is a physical alteration.

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5.

Classify the following as a physical or chemical change. Letting the nail rust.
- A.
  
  Physical change
- B.
  
  Chemical change
Correct Answer
B. Chemical change

Explanation
Letting the nail rust is classified as a chemical change because it involves a chemical reaction. When the iron in the nail reacts with oxygen in the presence of moisture, it forms iron oxide or rust. This reaction changes the composition and properties of the nail, resulting in a new substance being formed.

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6.

Classify the following as a physical or chemical change: You combine two clear liquids, and they turn cloudy white.
- A.
  
  Physical change
- B.
  
  Chemical change
Correct Answer
B. Chemical change

Explanation
When two clear liquids are mixed and a white substance is formed, it is an example of a chemical change. A chemical change is a change in which one or more new substances are formed, and the original substances are chemically altered.. In this case, the two reactants have undergone a chemical reaction that leads to the formation of a precipitate.

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7.

Classify the following as a physical or chemical change: You put a yellow liquid and a blue liquid together, and they become green.
- A.
  
  Physical change
- B.
  
  Chemical change
Correct Answer
B. Chemical change

Explanation
The scenario described involves a chemical change. When you mix a yellow liquid and a blue liquid to produce a green liquid, a chemical reaction occurs. The colors change due to the combination of the two substances, indicating that the molecules in the liquids are rearranging, forming new chemical compounds.

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8.

Classify the following as a physical or chemical change: Cutting an apple in half.
- A.
  
  Physical change
- B.
  
  Chemical change
Correct Answer
A. Physical change

Explanation
Cutting an apple in half is classified as a physical change because it does not alter the chemical composition of the apple. The act of cutting simply separates the apple into two pieces, but the molecules and atoms within the apple remain the same. No new substances are formed as a result of cutting the apple.

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82
11
9.

Classify the following as a physical or chemical change: Letting the cut apple sit out and it turns brown.
- A.
  
  Physical change
- B.
  
  Chemical change
Correct Answer
B. Chemical change

Explanation
When the cut apple is left out and turns brown, it undergoes a chemical change. This is because the browning of the apple is caused by a chemical reaction between the oxygen in the air and the enzymes in the apple. This reaction leads to the formation of a brown pigment called melanin.

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10.

Classify the following as a physical or chemical change: The formation of gas bubbles.
- A.
  
  Physical change
- B.
  
  Chemical change
Correct Answer
B. Chemical change

Explanation
The formation of gas bubbles is classified as a chemical change because it involves a chemical reaction. Gas bubbles are typically formed when a substance undergoes a chemical reaction, such as the release of gas as a product of a reaction. This indicates a change in the chemical composition of the substance, making it a chemical change.

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Daniel P |MSEd, Science |

Science Education

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Current Version
Feb 27, 2024

Quiz Edited by
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Expert Reviewed by
Daniel P
Sep 15, 2011

Quiz Created by
Tmachens

Physical And Chemical Changes Quiz

Physical And Chemical Changes Questions and Answers

Classify the following as a physical or chemical change: Tearing a piece of paper into 100 pieces.

Classify the following as a physical or chemical change: Burning a piece of paper.

Classify the following as a physical or chemical change: A reaction occurs, and the product(s) is (are) different from what you started with.

Classify the following as a physical or chemical change: Hammering a nail into a piece of wood.

Classify the following as a physical or chemical change. Letting the nail rust.

Classify the following as a physical or chemical change: You combine two clear liquids, and they turn cloudy white.

Classify the following as a physical or chemical change: You put a yellow liquid and a blue liquid together, and they become green.

Classify the following as a physical or chemical change: Cutting an apple in half.

Classify the following as a physical or chemical change: Letting the cut apple sit out and it turns brown.

Classify the following as a physical or chemical change: The formation of gas bubbles.