Chemistry 9 Practice Test
Questions and Answers
- 1.
A solid has a...
- A.
No definite shape; Definite Volume
- B.
Definite Shape; Definite Volume
- C.
No definite shape; No definite volume
Correct Answer
B. Definite Shape; Definite VolumeExplanation
A solid has a definite shape because its particles are closely packed and have a fixed arrangement, which gives it a specific shape. It also has a definite volume because the particles are tightly packed and cannot be compressed, meaning it occupies a specific amount of space.Rate this question:
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- 2.
A liquid has a...
- A.
Definite Shape; Definite Volume
- B.
No Definite Shape; No Definite Volume
- C.
Definite Volume; No Definite Shape
Correct Answer
C. Definite Volume; No Definite ShapeExplanation
The correct answer is "Definite Volume; No Definite Shape". This means that the liquid has a fixed volume, meaning it occupies a specific amount of space, but it does not have a fixed shape and can take the shape of its container. Liquids are able to flow and conform to the shape of their container due to the weak intermolecular forces between their particles.Rate this question:
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- 3.
A gas has...
- A.
No Definite Volume; No Definite Shape
- B.
Definite Volume; No Definite Shape
- C.
Definite Volume; Definite Shape
Correct Answer
A. No Definite Volume; No Definite ShapeExplanation
The gas has no definite volume because it expands to fill the entire container it is in. It also has no definite shape because it takes the shape of its container.Rate this question:
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- 4.
What is the energy of motion?
- A.
Potential Energy
- B.
Kinetic Energy
- C.
Thermal Energy
- D.
Chemical Energy
Correct Answer
B. Kinetic EnergyExplanation
Kinetic energy is the energy of motion. It is the energy possessed by an object due to its motion. When an object is in motion, it has the ability to do work and transfer energy. The amount of kinetic energy an object has depends on its mass and velocity. As an object's mass or velocity increases, its kinetic energy also increases. Therefore, kinetic energy is the correct answer for the given question.Rate this question:
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- 5.
Proportional: When the temperature goes up the volume...
- A.
Goes Down
- B.
Goes Up
Correct Answer
B. Goes UpExplanation
When the temperature goes up, the volume of a substance also increases. This is because as the temperature rises, the particles of the substance gain more energy and move faster, causing them to spread out and occupy more space. This relationship is known as direct proportionality, where an increase in one variable (temperature) leads to a corresponding increase in another variable (volume).Rate this question:
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- 6.
Proportional: When the temperature goes down, the volume...
- A.
Goes Up
- B.
Goes Down
Correct Answer
B. Goes DownExplanation
According to the given statement, when the temperature goes down, the volume goes down. This suggests that there is a proportional relationship between temperature and volume. As temperature decreases, the volume also decreases. This can be explained by the fact that as temperature decreases, the particles in a substance have less energy and move slower, causing them to be closer together and occupy less space, resulting in a decrease in volume.Rate this question:
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- 7.
Inversely Proportional: When the temperature goes up, the volume...
- A.
Goes Up
- B.
Goes Down
Correct Answer
B. Goes DownExplanation
In an inversely proportional relationship, as one variable increases, the other variable decreases. In this case, as the temperature goes up, the volume goes down. This means that when the temperature increases, the volume decreases.Rate this question:
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- 8.
Inversely Proportional: When the temperature goes down, the volume...
- A.
Goes Up
- B.
Goes Down
Correct Answer
A. Goes UpExplanation
In an inversely proportional relationship, as one variable increases, the other variable decreases. Therefore, when the temperature goes down, the volume increases.Rate this question:
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- 9.
What are the 3 types of evidence for a chemical change?
- A.
Change in Color
- B.
Change in Phase
- C.
Formation of a Precipitate
- D.
Production of Gas
- E.
Change in Temperture
Correct Answer(s)
A. Change in Color
C. Formation of a Precipitate
D. Production of GasExplanation
The correct answer is Change in Color, Formation of a Precipitate, and Production of Gas. These three types of evidence are indicators of a chemical change. A change in color occurs when the substance undergoing the change transforms into a different color. Formation of a precipitate happens when two substances react and a solid is formed. Production of gas occurs when a gas is released during a chemical reaction. These evidences suggest that a chemical reaction has taken place and new substances have been formed.Rate this question:
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- 10.
What classification of matter requires the substance to be an element or a compound?
- A.
Homogeneous Mixture
- B.
Solution
- C.
Heterogeneous Mixture
- D.
Pure Substance
Correct Answer
D. Pure SubstanceExplanation
A pure substance is a classification of matter that requires the substance to be either an element or a compound. Elements are substances that cannot be broken down into simpler substances, while compounds are substances made up of two or more elements chemically combined. Both elements and compounds are pure substances because they have a uniform and definite composition. Homogeneous mixtures, solutions, and heterogeneous mixtures do not have a fixed composition and therefore do not fall under the classification of pure substances.Rate this question:
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- 11.
A(n) ________ is a single type of atom that cannot be broken down into simpler substances.
Correct Answer
Element, elementExplanation
An element is a single type of atom that cannot be broken down into simpler substances. Each element has its own unique properties and is represented by a specific symbol on the periodic table. Elements combine to form compounds, but they themselves cannot be further broken down into simpler substances.Rate this question:
- 12.
A ________ is a property of a mixture where particles are large enough that they will settle out over time or can be removed through filtration.
Correct Answer
Solution, solutionExplanation
A solution is a property of a mixture where particles are large enough that they will settle out over time or can be removed through filtration.Rate this question:
- 13.
What is a Physical Change?
- A.
When the properties of a material change, and the substance remains the same.
- B.
No reaction is needed, and new substances are created.
- C.
When a reaction occurs, and one or more substances are created.
- D.
When the properties of a material change, and new substances are created.
Correct Answer
A. When the properties of a material change, and the substance remains the same.Explanation
A physical change refers to a transformation in the properties of a material without the formation of new substances. In this type of change, the substance retains its chemical composition, but its physical characteristics, such as shape, size, or state, may alter. This is different from a chemical change where new substances are formed through a chemical reaction.Rate this question:
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- 14.
What is a Chemical Change?
- A.
No reaction is needed, and new substances are created.
- B.
When a reaction occurs, and one or more substances are created.
- C.
When the properties of a material change, and the substance remains the same.
- D.
When the properties of a material change, and new substances are created.
Correct Answer
B. When a reaction occurs, and one or more substances are created.Explanation
A chemical change refers to a process in which a reaction takes place and one or more new substances are formed. This means that the original substances undergo a transformation, resulting in the creation of different substances with distinct properties. The formation of new substances is a key characteristic of a chemical change, distinguishing it from a physical change where the properties may alter, but the substance remains the same.Rate this question:
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- 15.
Name the 2 chemical properties of matter.
- A.
Reactivity, Viscosity
- B.
Reactivity, Precipitation
- C.
Reactivity, Fammability
- D.
Reactivity, Conductivity
Correct Answer
C. Reactivity, FammabilityExplanation
The correct answer is Reactivity, Flammability. Chemical properties of matter refer to the characteristics that describe how a substance interacts with other substances to form new substances. Reactivity is the ability of a substance to undergo a chemical reaction and form new substances. Flammability is the ability of a substance to burn or ignite when exposed to a flame or heat. These two properties are important in understanding the behavior and potential hazards of different substances.Rate this question:
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- 16.
A covalent bond is when...
- A.
One atom steals an electron from another atom.
- B.
Two atoms share a pair of valence electrons.
- C.
One atom is given an electron from another atom.
- D.
Two atoms share a single valence electron.
Correct Answer
B. Two atoms share a pair of valence electrons.Explanation
A covalent bond is formed when two atoms share a pair of valence electrons. In this type of bond, the atoms are able to achieve a stable electron configuration by sharing their outermost electrons. This sharing allows both atoms to fill their outer electron shells and become more stable.Rate this question:
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- 17.
The Alkali Metals Group (group 1A) has one valence electron so it makes the elements in this group very reactive.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The Alkali Metals Group (group 1A) consists of elements that have one valence electron. This means that they have a strong tendency to lose this electron and form positive ions. This makes them highly reactive as they readily react with other elements to achieve a stable electron configuration. Therefore, the statement that the elements in this group are very reactive is true.Rate this question:
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Mar 20, 2023Quiz Edited by
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May 26, 2016Quiz Created by
Beccareitz
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