Physical And Chemical Properties And Changes-test A
In this scientific quiz, we’ll be looking at a number of physical and chemical properties in objects and how they change, with reference to such topics as volume, matter, litmus paper, density and more. What can you tell us?
Questions and Answers
- 1.
The amount of matter something has.
- A.
Acid
- B.
Base
- C.
Chemical property
- D.
Mass
Correct Answer
D. MassExplanation
Mass refers to the amount of matter that something has. It is a measure of the quantity of particles (atoms, molecules, etc.) that make up an object. The greater the mass, the more particles are present. Mass is an intrinsic property of matter and is independent of its location or surroundings. It can be measured using various techniques, such as weighing on a balance. In the context of the given options, mass is the most appropriate explanation for the term.Rate this question:
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- 2.
The amount of space something takes up.
- A.
Volume
- B.
Base
- C.
Chemical property
- D.
Mass
Correct Answer
A. VolumeExplanation
Volume refers to the amount of space that something occupies. It is a measure of the three-dimensional space that an object or substance occupies. In other words, it is the amount of space that an object takes up. It is commonly measured in units such as cubic meters or cubic centimeters.Rate this question:
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- 3.
A substance that turns blue litmus paper red.
- A.
Acid
- B.
Base
- C.
Chemical property
- D.
Mass
Correct Answer
A. AcidExplanation
An acid is a substance that turns blue litmus paper red. This is because acids release hydrogen ions (H+) when dissolved in water, which react with the blue litmus paper and cause it to turn red. Acids are known for their sour taste and ability to corrode metals. They also have a pH value less than 7.Rate this question:
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- 4.
A substance that turns red litmus paper blue.
- A.
Acid
- B.
Base
- C.
Chemical property
- D.
Mass
Correct Answer
B. BaseExplanation
A substance that turns red litmus paper blue is classified as a base. Bases are substances that have a pH greater than 7 and can neutralize acids. They are known for their ability to accept protons or donate hydroxide ions. When a base is added to red litmus paper, it reacts with the paper and causes it to turn blue, indicating its basic nature.Rate this question:
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- 5.
Something that describes a substance by itself.
- A.
Physical property
- B.
Base
- C.
Chemical property
- D.
Mass
Correct Answer
A. pHysical propertyExplanation
A physical property is a characteristic or description of a substance that can be observed or measured without changing the composition of the substance. It refers to the inherent qualities or attributes of a substance, such as color, density, texture, or melting point. In this context, "Something that describes a substance by itself" aligns with the concept of a physical property because it focuses on the substance itself and its characteristics.Rate this question:
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- 6.
Something that describes the ability of a substance to react with other substances.
- A.
Physical property
- B.
Base
- C.
Chemical property
- D.
Mass
Correct Answer
C. Chemical propertyExplanation
A chemical property refers to the ability of a substance to react with other substances. It describes the behavior of a substance when it undergoes a chemical change or reaction. Unlike physical properties, which can be observed without changing the composition of the substance, chemical properties can only be observed when a substance interacts with another substance. This includes properties such as flammability, reactivity, and toxicity.Rate this question:
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- 7.
A student can't remember how to find the density of an object. What would you tell him to do to calculate density?
- A.
Find the object's mass and add its volume
- B.
Divide the object's mass by its volume
- C.
Subtract the object's mass from its volume
- D.
Multiply the object's mass by its volume
Correct Answer
B. Divide the object's mass by its volumeExplanation
To calculate the density of an object, you need to divide the object's mass by its volume. Density is defined as the mass of an object per unit volume, so dividing the mass by the volume will give you the density value.Rate this question:
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- 8.
A student is reading the warning on a drain-cleaning product. It says that the product is a strong base. What is likely to be the pH of the drain cleaner?
- A.
2
- B.
6
- C.
8
- D.
12
Correct Answer
D. 12Explanation
The warning on the drain-cleaning product states that it is a strong base. Bases have a pH greater than 7, so the pH of the drain cleaner is likely to be 12.Rate this question:
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- 9.
A student has a beaker containing a clear liquid. She puts a drop of this liquid on a piece of blue litmus paper, and the paper turns red. Then she adds 10 mg of baking soda to the beaker and stirs. Now drops of the liquid do not affect the color of red nor blue litmus paper. What kind of liquid is in the student's beaker now?
- A.
An acid
- B.
A base
- C.
A liquid that is neutral
- D.
Cannot tell
Correct Answer
C. A liquid that is neutralExplanation
The student's beaker now contains a liquid that is neutral. This can be inferred from the fact that the liquid initially turned the blue litmus paper red, indicating it was acidic. However, after adding baking soda, which is a basic substance, the liquid no longer affects the color of both red and blue litmus paper. This suggests that the beaker now contains a neutral liquid.Rate this question:
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- 10.
Which of the following is not a physical property?
- A.
The ability of a substance to dissolve in water
- B.
The ability of a substance to change directly into gas
- C.
The ability of a substance to react with oxygen
- D.
The ability of a substance to melt at a specific temperature
Correct Answer
C. The ability of a substance to react with oxygenExplanation
The ability of a substance to react with oxygen is not a physical property because it involves a chemical change rather than a physical change. Physical properties are characteristics that can be observed or measured without changing the substance's chemical composition. Dissolving in water, changing directly into gas, and melting at a specific temperature are all physical properties as they can be observed or measured without any chemical reactions taking place.Rate this question:
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- 11.
Which of the following is a chemical property?
- A.
Length of a matchstick
- B.
Color of a matchstick
- C.
Ability of a matchstick to float on water
- D.
Ability of a matchstick to burn when struck
Correct Answer
D. Ability of a matchstick to burn when struckExplanation
The ability of a matchstick to burn when struck is a chemical property because it involves a chemical reaction. When a matchstick is struck, the heat from friction triggers a chemical reaction between the chemicals on the match head and the oxygen in the air, resulting in combustion and the release of energy in the form of heat and light. This ability to undergo a chemical reaction distinguishes it as a chemical property.Rate this question:
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- 12.
The element helium (He) will not react chemically with other elements. Which word describes this property of helium?
- A.
Acidic
- B.
Reactive
- C.
Basic
- D.
Stable
Correct Answer
D. StableExplanation
Helium is described as "stable" because it does not react chemically with other elements. This means that it does not easily form compounds or undergo chemical reactions.Rate this question:
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- 13.
A substance that turns red litmus paper blue is called a
- A.
Base
- B.
Volume
- C.
Stability
- D.
Indicators
Correct Answer
A. BaseExplanation
A substance that turns red litmus paper blue is called a base. Bases are substances that have a pH greater than 7 and can neutralize acids. When a base reacts with red litmus paper, it causes a color change from red to blue, indicating its basic nature. This is because bases have the ability to accept protons (H+) from acids, resulting in the formation of water and a salt. Therefore, the correct answer is base.Rate this question:
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- 14.
The amount of space an object takes up is referred to as its
- A.
Volume
- B.
Stability
- C.
Indicators
- D.
Mass
Correct Answer
A. VolumeExplanation
Volume refers to the amount of space that an object occupies. It is a measure of how much three-dimensional space an object takes up. The concept of volume is used to describe the size or capacity of an object, such as the amount of water a container can hold or the amount of air in a room. It is a fundamental property of matter and is often calculated by multiplying the length, width, and height of an object.Rate this question:
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- 15.
One or more new substances are formed during a
- A.
Chemical change
- B.
Base
- C.
Volume
- D.
Stability
Correct Answer
A. Chemical changeExplanation
In a chemical change, the substances involved undergo a chemical reaction and form one or more new substances with different properties. This is different from a physical change, where the substances may change in form or state but their chemical composition remains the same. Therefore, the formation of new substances is a characteristic of a chemical change.Rate this question:
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- 16.
The amount of matter an object contains is referred to as its
- A.
Mass
- B.
Chemical change
- C.
Base
- D.
Volume
Correct Answer
A. MassExplanation
Mass is the correct answer because it refers to the amount of matter an object contains. It is a measure of the inertia of an object and is often measured in units such as kilograms or pounds. Mass is different from weight, which is the force exerted on an object due to gravity.Rate this question:
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- 17.
Litmus paper and cabbage juice are
- A.
Indicators
- B.
Mass
- C.
Chemical change
- D.
Base
Correct Answer
A. IndicatorsExplanation
Litmus paper and cabbage juice are both examples of indicators. Indicators are substances that change color in the presence of certain conditions, such as acids or bases. They are used to determine the pH level of a solution by observing the color change. Therefore, the correct answer is "indicators".Rate this question:
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- 18.
Which of the following is a chemical property?
- A.
Is attracted to magnets
- B.
Burns easily
- C.
Has a volume of 24 L
- D.
Has a smooth surface
Correct Answer
B. Burns easilyExplanation
Burning easily is a chemical property because it involves a chemical reaction. Chemical properties describe how a substance can change or react with other substances to form new substances. In this case, the substance has the ability to undergo combustion, which is a chemical reaction that produces heat, light, and often new substances.Rate this question:
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- 19.
A board has a mass of 750 g. If you ground the whole board down to sawdust, what would be the mass of the pile of sawdust?
- A.
Much less than 750 g
- B.
A little less than 750 g
- C.
Exactly 750 g
- D.
More than 750 g
Correct Answer
C. Exactly 750 g -
- 20.
Which of the following is a physical property?
- A.
Burns easily
- B.
Does not react with other substances
- C.
Mixes with water
- D.
Reacts with chlorine to form salt
Correct Answer
C. Mixes with waterExplanation
Mixing with water is a physical property because it describes a characteristic of a substance that can be observed or measured without changing its chemical composition. In this case, the substance is able to mix with water, which is a physical change that does not alter its chemical identity.Rate this question:
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- 21.
Which would be the pH value of a strong base?
- A.
13
- B.
7
- C.
5
- D.
0
Correct Answer
A. 13Explanation
A strong base is a substance that can easily accept protons (H+) from water, resulting in hydroxide ions (OH-) being formed. The pH scale is a measure of the concentration of H+ ions in a solution. A pH value of 13 indicates a high concentration of hydroxide ions and a low concentration of H+ ions, making it a strong base. Therefore, a pH value of 13 would be the pH value of a strong base.Rate this question:
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- 22.
Which common household item below is the strongest acid?
- A.
Apples-pH of 3
- B.
Milk-pH of 6
- C.
Lemon juice-pH of 2
- D.
Drain cleaner-pH of 12
Correct Answer
C. Lemon juice-pH of 2Explanation
Lemon juice has a pH of 2, which indicates that it is highly acidic. The lower the pH value, the stronger the acid. Therefore, among the given options, lemon juice is the strongest acid.Rate this question:
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- 23.
What are the three main states of matter?
- A.
Solid, liquid, and gas
- B.
Ice, water, and steam
- C.
Temperature, pressure, and energy
- D.
Hot, cold, and warm
Correct Answer
A. Solid, liquid, and gasExplanation
The three main states of matter are solid, liquid, and gas. These states are defined by the arrangement and movement of particles. In a solid, particles are tightly packed and vibrate in place. In a liquid, particles are close together but can move past each other. In a gas, particles are spread out and move freely. This classification is based on observable physical properties and is widely accepted in the scientific community.Rate this question:
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- 24.
What might happen if you mixed a base with an equal amount of acid?
- A.
You would see an explosive chemical reaction
- B.
The acid would destroy the base
- C.
The base would destroy the acid
- D.
They would balance out and you would have a neutral substance
Correct Answer
D. They would balance out and you would have a neutral substanceExplanation
When a base is mixed with an equal amount of acid, they undergo a chemical reaction known as neutralization. During this reaction, the base and acid react with each other to form water and a salt. The salt formed is a neutral substance, meaning it is neither acidic nor basic. Therefore, when a base is mixed with an equal amount of acid, they balance out and result in a neutral substance.Rate this question:
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- 25.
Pure water (H2O) has a pH level of
- A.
3
- B.
7 (neutral)
- C.
9
- D.
11
Correct Answer
B. 7 (neutral)Explanation
Pure water has a pH level of 7 because it is neither acidic nor alkaline. A pH level of 7 is considered neutral, indicating that the concentration of hydrogen ions is equal to the concentration of hydroxide ions in the water. This balance of ions results in a neutral pH level.Rate this question:
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- 26.
Glass breaking is a _____ change
- A.
Physical
- B.
Chemical
Correct Answer
A. pHysicalExplanation
Glass breaking is a physical change because it does not involve any chemical reactions. When glass breaks, its physical properties such as shape and size change, but its chemical composition remains the same. The bonds between the glass molecules are simply rearranged, causing the glass to fracture into smaller pieces. No new substances are formed during this process.Rate this question:
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- 27.
Hammering wood together is a _____ change
- A.
Physical
- B.
Chemical
Correct Answer
A. pHysicalExplanation
Hammering wood together is a physical change because it does not alter the chemical composition of the wood. The wood remains the same substance, but its shape and arrangement are changed by the physical force applied through hammering.Rate this question:
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- 28.
A rusting bicycle is a _____ change
- A.
Physical
- B.
Chemical
Correct Answer
B. ChemicalExplanation
Rusting is a chemical change because it involves a chemical reaction between iron, oxygen, and water. During the process of rusting, iron reacts with oxygen in the presence of moisture to form iron oxide, which is the reddish-brown substance commonly known as rust. This chemical reaction changes the composition and properties of the iron, making it a chemical change rather than a physical change.Rate this question:
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- 29.
Melting butter is a _____ change
- A.
Physical
- B.
Chemical
Correct Answer
A. pHysicalExplanation
Melting butter is a physical change because it is a change in the state of matter from solid to liquid, without any change in the chemical composition of the butter. The molecules in the butter are rearranged, but their chemical bonds remain the same.Rate this question:
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- 30.
Frying an egg is a _____ change
- A.
Physical
- B.
Chemical
Correct Answer
B. ChemicalExplanation
Frying an egg is a chemical change because it involves a chemical reaction. When heat is applied to the egg, the proteins in the egg undergo denaturation and coagulation, resulting in the formation of a solid structure. This irreversible change in the composition and properties of the egg is a characteristic of a chemical change.Rate this question:
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- 31.
Cutting grass is a _____ change
- A.
Physical
- B.
Chemical
Correct Answer
A. pHysicalExplanation
Cutting grass is a physical change because it does not alter the chemical composition of the grass. The grass remains as grass, but it is simply being physically altered in size or shape. No new substances are formed during the process of cutting grass.Rate this question:
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- 32.
Burning leaves is a _____ change
- A.
Physical
- B.
Chemical
Correct Answer
B. ChemicalExplanation
Burning leaves is a chemical change because it involves a chemical reaction. When leaves burn, the organic compounds in the leaves undergo combustion, which releases heat, light, and produces new substances such as carbon dioxide, water vapor, and ash. This change is irreversible and results in the formation of new substances with different properties than the original leaves.Rate this question:
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- 33.
Fireworks exploding is a _____ change
- A.
Physical
- B.
Chemical
Correct Answer
B. ChemicalExplanation
Fireworks exploding is a chemical change because it involves a chemical reaction. The chemicals within the fireworks undergo a reaction, resulting in the production of light, heat, and sound. This change is not reversible, as the original substances are transformed into new substances with different properties.Rate this question:
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- 34.
Cutting your hair is a _____ change
- A.
Physical
- B.
Chemical
Correct Answer
A. pHysicalExplanation
Cutting your hair is a physical change because it does not alter the chemical composition of the hair. The hair remains made up of the same molecules before and after it is cut. The change is merely a physical alteration in the length or shape of the hair, but the chemical properties of the hair remain unchanged.Rate this question:
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- 35.
Boiling water is a _____ change
- A.
Physical
- B.
Chemical
Correct Answer
A. pHysicalExplanation
Boiling water is a physical change because it involves a change in the state of matter from liquid to gas, without any alteration in the chemical composition of water molecules. The process of boiling water involves the absorption of heat energy, which causes the water molecules to gain enough kinetic energy to overcome the intermolecular forces and form water vapor. This change is reversible, as the water vapor can condense back into liquid water when cooled. Therefore, boiling water is considered a physical change.Rate this question:
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Mar 22, 2023Quiz Edited by
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Sep 25, 2011Quiz Created by
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