Chemical And Physical Change

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| By Mamanakis2003

Mamanakis2003

Community Contributor

Quizzes Created: 1 | Total Attempts: 321

Questions: 15 | Attempts: 323 | Updated: Feb 23, 2023

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Questions and Answers

1.

4. Combustiblility is a physical property.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
Something is changing to another substance.

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2.

3. Flammability is a _________ kind of change?
- A.
  
  Physical change
- B.
  
  Chemical change
- C.
  
  Both
Correct Answer
B. Chemical change

Explanation
Flammability refers to the ability of a substance to burn or ignite. When a substance undergoes a chemical change, its chemical composition is altered, resulting in the formation of new substances with different properties. In the case of flammability, the substance is reacting with oxygen in the air, producing heat and light, and forming new chemical compounds. Therefore, flammability is a chemical change rather than a physical change, which refers to changes in the state or form of matter without altering its chemical composition.

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3.

2. Which of these is an example of a physical change?
- A.
  
  Cutting
- B.
  
  Ice melting
- C.
  
  Chewing food
- D.
  
  All of the above
Correct Answer
D. All of the above

Explanation
Cutting, ice melting, and chewing food are all examples of a physical change.

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4.

1. Which one is not a chemical change?
- A.
  
  Rusting
- B.
  
  Cutting
- C.
  
  Flammability
Correct Answer
B. Cutting

Explanation
Cutting is a physical change, not chemical.

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5.

Cutting is a physical change.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
An object is not changing to another substance.

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6.

Cutting hair is a chemical change.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
Cutting hair is a physical change, not a chemical change. Chemical changes involve the formation of new substances with different chemical properties, while physical changes only alter the physical appearance or state of a substance. Cutting hair does not involve any chemical reactions or the formation of new substances, it only changes the length or shape of the hair strands. Therefore, the statement is false.

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7.

Melted ice is a _____ change

Correct Answer
Physical

Explanation
Melted ice is a physical change because it undergoes a change in state from solid to liquid without any alteration in its chemical composition. In this process, the ice molecules gain enough energy to overcome the forces holding them together in a solid structure, resulting in a transition to a liquid state. The molecules remain the same, only their arrangement changes. Therefore, this change is classified as a physical change rather than a chemical change.

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4
8.

What is the physical change?
- A.
  
  Breaking a plate
- B.
  
  Burning wood
- C.
  
  Boiling a egg
Correct Answer
A. Breaking a plate

Explanation
Breaking a plate is a physical change because it does not alter the chemical composition of the plate. The plate remains made of the same material, but it changes in its physical form. The bonds between the molecules of the plate are broken, causing it to shatter into smaller pieces. This change can be reversed by reassembling the pieces, demonstrating that it is a physical change rather than a chemical one.

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9.

A tarnished ring is a chemical change?
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
A tarnished ring is a chemical change because tarnishing is a result of a chemical reaction between the metal in the ring and substances in the environment, such as oxygen or sulfur. This reaction causes a chemical change in the metal, resulting in the formation of a new compound on the surface of the ring. Unlike a physical change, such as bending or melting, which can be reversed without changing the composition of the substance, tarnishing cannot be easily reversed and involves the formation of new chemical compounds.

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10.

Bacon frying is what kind of change?
- A.
  
  Physical
- B.
  
  Chemical
Correct Answer
B. Chemical

Explanation
Bacon frying is a chemical change because it involves the process of cooking, which causes the proteins and fats in the bacon to undergo chemical reactions such as denaturation, oxidation, and caramelization. These chemical reactions result in the browning and flavor development of the bacon, transforming its original composition and properties. Therefore, bacon frying is not a reversible change and is classified as a chemical change rather than a physical change.

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11.

Curded milk is a chemical change.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
Curded milk undergoes a chemical change because the proteins in the milk, specifically casein, undergo a process called denaturation. Denaturation occurs when the proteins unfold and form new bonds, resulting in the formation of curds. This process is irreversible and involves a change in the chemical composition of the milk, making it a chemical change rather than a physical change.

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12.

Making chicken stir-fry is a _______ change?

Correct Answer
Chemical

Explanation
Making chicken stir-fry involves cooking the chicken, which is a chemical change. Chemical changes involve the formation of new substances with different properties. In this case, the heat applied during cooking causes chemical reactions in the chicken, leading to changes in its texture, flavor, and color. Therefore, making chicken stir-fry is a chemical change.

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4
13.

Washing a cup is a ...........
- A.
  
  Chemical change
- B.
  
  Physical change
Correct Answer
B. Physical change

Explanation
Washing a cup involves cleaning it with water and soap, which does not result in any chemical reaction or change in the composition of the cup. It is simply a physical change where dirt, stains, and other particles are removed from the cup's surface. The cup remains the same chemically before and after washing, making it a physical change.

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14.

A glowing fire is a physical change.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
A glowing fire is not a physical change, but rather a chemical change. When a fire glows, it is due to the combustion of fuel, which involves a chemical reaction between the fuel and oxygen. This chemical reaction produces heat, light, and various gases. Therefore, the statement that a glowing fire is a physical change is incorrect.

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15.

Smoke rising is a ______ change.

Correct Answer
physical

Explanation
Smoke rising is a physical change because it involves a change in the physical state or appearance of the substance. In this case, the solid particles in the smoke are being converted into a gas form, which is a physical transformation. The chemical composition of the smoke remains the same, but its physical properties, such as its state and appearance, are altered.

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4

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Current Version
Feb 23, 2023

Quiz Edited by
ProProfs Editorial Team
Feb 28, 2014

Quiz Created by
Mamanakis2003

Chemical And Physical Change

4. Combustiblility is a physical property.

3. Flammability is a _________ kind of change?

2. Which of these is an example of a physical change?

1. Which one is not a chemical change?

Cutting is a physical change.

Cutting hair is a chemical change.

Melted ice is a _____ change

What is the physical change?

A tarnished ring is a chemical change?

Bacon frying is what kind of change?

Curded milk is a chemical change.

Making chicken stir-fry is a _______ change?

Washing a cup is a ...........

A glowing fire is a physical change.

Smoke rising is a ______ change.