Is Matter Around Us Pure MCQ

Q: What is a pure substance?

A pure substance has the same chemical composition throughout, and it can be an element or a compound.

Q: What is a mixture?

A mixture is a physical combination of two or more pure substances, with variable composition. Mixtures can be homogeneous or heterogeneous.

Q: What are the different types of mixtures?

Mixtures are classified as solutions, suspensions, or colloids, depending on the size and distribution of the solute particles in the solvent.

Q: What is the Tyndall effect?

The Tyndall effect is the scattering of light by colloidal particles, making the light beam visible through the colloid.

Q: What are the differences between physical and chemical changes?

A physical change alters the form or appearance of a substance, while a chemical change alters its chemical composition, resulting in the formation of new substances.

Question 1

Question 1: Which of the following is NOT a mixture?

A. AirB. MilkC. SaltD. Soil

Answer

C. Salt. Salt is a compound, not a mixture. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 2

Question 2: What is a characteristic of mixtures?

A. They have a fixed composition.B. They can be separated by physical means.C. They are always liquids.D. They contain only one type of particle.

Answer

B. They can be separated by physical means. Mixtures can be separated using methods like filtration, evaporation, etc. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 3

Question 3: Which of the following is an example of a solid-liquid mixture?

A. Sugar dissolved in waterB. Sand and waterC. AirD. Milk

Answer

B. Sand and water. Sand is a solid, and water is a liquid. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 4

Question 4: Why is milk considered a mixture?

A. It contains only one substance.B. It has a fixed boiling point.C. It can be separated into different components.D. It cannot be seen with the naked eye.

Answer

C. It can be separated into different components. Milk contains fat, water, proteins, etc. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 5

Question 5: Which separation technique would you use to separate salt from seawater?

A. FiltrationB. DistillationC. EvaporationD. Chromatography

Answer

C. Evaporation. Evaporation can separate a dissolved solid (salt) from a liquid (water). (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 6

Question 6: What is the primary difference between a pure substance and a mixture?

A. Pure substances are always solids.B. Mixtures have a fixed melting point.C. Pure substances cannot be separated by physical means.D. Mixtures are always homogeneous.

Answer

C. Pure substances cannot be separated by physical means. Pure substances consist of only one type of particle. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 7

Question 7: Which of these is a homogeneous mixture?

A. A saladB. Salt and pepperC. Sugar dissolved in waterD. Oil and water

Answer

C. Sugar dissolved in water. A homogeneous mixture has a uniform composition throughout. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 8

Question 8: Why is it important to understand the difference between mixtures and pure substances?

A. It helps in classifying matter.B. It is essential for scientific research.C. It helps in understanding the properties of materials.D. All of the above

Answer

D. All of the above. Understanding mixtures and pure substances is fundamental to chemistry and material science. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 9

Question 9: Which of the following is NOT a property of a mixture?

A. Variable compositionB. Components retain their individual propertiesC. Fixed melting and boiling pointD. Can be separated by physical means

Answer

C. Fixed melting and boiling point. Mixtures do not have a fixed melting and boiling point. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 10

Question 10: Give an example of a mixture found in nature.

A. GoldB. DiamondC. SeawaterD. Oxygen

Answer

C. Seawater. Seawater contains a mixture of salts and water. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 11

Question 11: What are the two main types of mixtures?

A. Solid and liquidB. Homogeneous and heterogeneousC. Elements and compoundsD. Pure and impure

Answer

B. Homogeneous and heterogeneous. These classifications are based on the uniformity of the mixture. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 12

Question 12: What is a homogeneous mixture?

A. A mixture with a uniform composition throughoutB. A mixture with distinct visible componentsC. A mixture that cannot be separatedD. A mixture that is always a liquid

Answer

A. A mixture with a uniform composition throughout. You cannot see the individual components. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 13

Question 13: Which of the following is an example of a heterogeneous mixture?

A. SaltwaterB. Sugar dissolved in waterC. Sand and iron filingsD. Air

Answer

C. Sand and iron filings. You can see the different components. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 14

Question 14: What is another name for a homogeneous mixture?

A. SuspensionB. ColloidC. SolutionD. Emulsion

Answer

C. Solution. Solutions are homogeneous mixtures. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 15

Question 15: Which of the following is NOT a characteristic of a heterogeneous mixture?

A. Components are evenly distributed.B. Individual components can be easily identified.C. May exhibit the Tyndall effect.D. Composition varies throughout the mixture.

Answer

A. Components are evenly distributed. This is a characteristic of homogeneous mixtures. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 16

Question 16: Give an example of a solid-solid heterogeneous mixture.

A. AirB. SoilC. SaltwaterD. Milk

Answer

B. Soil. Soil contains a variety of different solid components. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 17

Question 17: Why is a salad dressing considered a heterogeneous mixture?

A. It has a uniform composition.B. It contains only one substance.C. You can see the different components, like oil and vinegar.D. It cannot be separated.

Answer

C. You can see the different components, like oil and vinegar. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 18

Question 18: What type of mixture is fog?

A. Solid-liquidB. Liquid-liquidC. Gas-liquidD. Gas-gas

Answer

C. Gas-liquid. Fog is a mixture of water droplets (liquid) suspended in air (gas). (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 19

Question 19: Which of the following is a homogeneous mixture of gases?

A. SmokeB. FogC. AirD. Cloud

Answer

C. Air. Air is a mixture of different gases like nitrogen, oxygen, etc. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 20

Question 20: How can you distinguish between a homogeneous and a heterogeneous mixture?

A. By observing if the components are uniformly distributed.B. By checking if the mixture has a fixed boiling point.C. By seeing if the mixture can be separated by physical means.D. By determining the color of the mixture.

Answer

A. By observing if the components are uniformly distributed. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 21

Question 21: What is a solution?

A. A heterogeneous mixture of two or more substancesB. A pure substanceC. A homogeneous mixture of two or more substancesD. A compound

Answer

C. A homogeneous mixture of two or more substances. Solutions are formed when one substance dissolves uniformly into another. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 22

Question 22: In a saltwater solution, what is the solute?

A. WaterB. SaltC. Both water and saltD. Neither water nor salt

Answer

B. Salt. The solute is the substance that dissolves into the solvent. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 23

Question 23: Which of the following is an example of a gas-liquid solution?

A. AirB. Soda waterC. MilkD. Saltwater

Answer

B. Soda water. Soda water has carbon dioxide gas dissolved in water. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 24

Question 24: What is the solvent in a solution of sugar dissolved in water?

A. SugarB. WaterC. Both sugar and waterD. Neither sugar nor water

Answer

B. Water. The solvent is the substance that dissolves the solute. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 25

Question 25: Which of the following is NOT a solution?

A. LemonadeB. BrassC. AirD. Sand and water

Answer

D. Sand and water. Sand and water form a heterogeneous mixture, not a solution. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 26

Question 26: What is a characteristic of a solution?

A. It has a fixed composition.B. It scatters a beam of light.C. It can be separated by filtration.D. It is homogeneous.

Answer

D. It is homogeneous. Solutions have a uniform composition throughout. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 27

Question 27: Which of the following is a solid-solid solution?

A. SaltwaterB. BrassC. Soda waterD. Milk

Answer

B. Brass. Brass is an alloy made by combining copper and zinc. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 28

Question 28: What is the term for a solution in which the solute is a gas and the solvent is a liquid?

A. Solid solutionB. Gaseous solutionC. Liquid solutionD. Heterogeneous solution

Answer

C. Liquid solution. In this case, the resulting solution is a liquid. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 29

Question 29: Which of the following is an example of a liquid-liquid solution?

A. AirB. VinegarC. MilkD. Brass

Answer

B. Vinegar. Vinegar is a solution of acetic acid in water. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 30

Question 30: Why is air considered a solution?

A. It is a heterogeneous mixture.B. It can be separated by filtration.C. It is a homogeneous mixture of gases.D. It contains only one substance.

Answer

C. It is a homogeneous mixture of gases. Air is primarily composed of nitrogen and oxygen, uniformly mixed. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 31

Question 31: What is an alloy?

A. A pure metalB. A mixture of a metal and a non-metalC. A solid solution of two or more metalsD. A compound

Answer

C. A solid solution of two or more metals. Alloys are formed by combining metals to enhance their properties. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 32

Question 32: Which of the following is an example of an alloy?

A. SaltwaterB. BrassC. Soda waterD. Milk

Answer

B. Brass. Brass is an alloy of copper and zinc. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 33

Question 33: Why are alloys considered mixtures?

A. They have a fixed composition.B. They can be separated into their components by physical methods.C. They show the properties of their constituents and can have variable composition.D. They are pure substances.

Answer

C. They show the properties of their constituents and can have variable composition. Alloys retain the properties of the metals they are made from. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 34

Question 34: What is the primary reason for creating alloys?

A. To make them cheaper.B. To enhance the properties of the constituent metals.C. To make them easier to melt.D. To change their color.

Answer

B. To enhance the properties of the constituent metals. Alloys often have improved strength, durability, or resistance to corrosion. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 35

Question 35: Which of the following is NOT a property of an alloy?

A. It is a solid solution.B. It can have variable composition.C. It can be separated into its components by physical methods.D. It is a pure substance.

Answer

D. It is a pure substance. Alloys are mixtures, not pure substances. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 36

Question 36: Which of the following is NOT a property of a solution?

A. It is a homogeneous mixture.B. The particles of a solution are smaller than 1 nm (10⁻⁹ metre) in diameter.C. The particles of a solution scatter a beam of light passing through it.D. The solute particles cannot be separated from the mixture by the process of filtration.

Answer

C. The particles of a solution scatter a beam of light passing through it.

Question 37

Question 37: What is the approximate size of particles in a solution?

A. Larger than 10⁻⁹ metreB. Smaller than 10⁻⁹ metreC. 10⁻⁹ metreD. 10⁹ metre

Answer

B. Smaller than 10⁻⁹ metre.

Question 38

Question 38: Why is the path of light not visible in a solution?

A. Because the particles are too large to scatter light.B. Because the particles are too small to scatter light.C. Because the solution is too concentrated.D. Because the solution is too dilute.

Answer

B. Because the particles are too small to scatter light.

Question 39

Question 39: Can a solution be separated by filtration?

A. YesB. NoC. Depends on the soluteD. Depends on the solvent

Question 40

Question 40: What does it mean for a solution to be stable?

A. The solute particles settle down when left undisturbed.B. The solute particles do not settle down when left undisturbed.C. The solution can be separated by filtration.D. The solution scatters a beam of light.

Answer

B. The solute particles do not settle down when left undisturbed.

Question 41

Question 41: Which of the following is NOT true about solutions?

A. They are homogeneous mixtures.B. They do not show the Tyndall effect.C. They can be separated by filtration.D. They are stable.

Answer

C. They can be separated by filtration.

Question 42

Question 42: What is the Tyndall effect?

A. The scattering of light by particles in a colloid or suspension.B. The settling down of particles in a suspension.C. The uniform distribution of particles in a solution.D. The separation of a mixture by filtration.

Answer

A. The scattering of light by particles in a colloid or suspension.

Question 43

Question 43: Why do solutions not exhibit the Tyndall effect?

A. Because the particles are too large to scatter light.B. Because the particles are too small to scatter light.C. Because the solution is too concentrated.D. Because the solution is too dilute.

Answer

B. Because the particles are too small to scatter light.

Question 44

Question 44: Which of the following is an example of a stable solution?

A. Sand and waterB. MilkC. SaltwaterD. Fog

Answer

C. Saltwater.

Question 45

Question 45: What is the difference between a stable and an unstable solution?

A. A stable solution can be separated by filtration, while an unstable solution cannot.B. An unstable solution can be separated by filtration, while a stable solution cannot.C. A stable solution does not show the Tyndall effect, while an unstable solution does.D. In a stable solution, the solute particles do not settle down when left undisturbed, while in an unstable solution, they do.

Answer

D. In a stable solution, the solute particles do not settle down when left undisturbed, while in an unstable solution, they do.

Question 46

Question 46: What is the concentration of a solution?

A. The amount of solvent present in a given amount of solution.B. The amount of solute present in a given amount of solution.C. The total amount of solution.D. The ratio of solute to solvent.

Answer

B. The amount of solute present in a given amount of solution.

Question 47

Question 47: What is a dilute solution?

A. A solution with a high concentration of solute.B. A solution with a low concentration of solute.C. A solution that cannot dissolve any more solute.D. A solution that is heterogeneous.

Answer

B. A solution with a low concentration of solute.

Question 48

Question 48: What is a concentrated solution?

A. A solution with a high concentration of solute.B. A solution with a low concentration of solute.C. A solution that cannot dissolve any more solute.D. A solution that is heterogeneous.

Answer

A. A solution with a high concentration of solute.

Question 49

Question 49: What is a saturated solution?

A. A solution with a low concentration of solute.B. A solution that can dissolve more solute at a given temperature.C. A solution that cannot dissolve any more solute at a given temperature.D. A solution that is heterogeneous.

Answer

C. A solution that cannot dissolve any more solute at a given temperature.

Question 50

Question 50: What is solubility?

A. The ability of a solute to dissolve in a solvent.B. The amount of solute that can dissolve in a given amount of solvent at a given temperature.C. The concentration of a solution.D. The temperature at which a solution becomes saturated.

Answer

B. The amount of solute that can dissolve in a given amount of solvent at a given temperature.

Question 51

Question 51: What is an unsaturated solution?

A. A solution that can dissolve more solute at a given temperature.B. A solution that cannot dissolve any more solute at a given temperature.C. A solution that is heterogeneous.D. A solution that is saturated.

Answer

A. A solution that can dissolve more solute at a given temperature.

Question 52

Question 52: How does temperature generally affect the solubility of solids in liquids?

A. Increasing temperature decreases solubility.B. Increasing temperature increases solubility.C. Temperature has no effect on solubility.D. The effect of temperature varies depending on the solute.

Answer

B. Increasing temperature increases solubility.

Question 53

Question 53: What is the mass by mass percentage of a solution?

A. The mass of solute divided by the mass of solvent, multiplied by 100.B. The mass of solute divided by the mass of solution, multiplied by 100.C. The volume of solute divided by the volume of solution, multiplied by 100.D. The mass of solvent divided by the mass of solute, multiplied by 100.

Answer

B. The mass of solute divided by the mass of solution, multiplied by 100.

Question 54

Question 54: What is the volume by volume percentage of a solution?

A. The mass of solute divided by the volume of solution, multiplied by 100.B. The volume of solute divided by the volume of solution, multiplied by 100.C. The mass of solute divided by the mass of solution, multiplied by 100.D. The volume of solvent divided by the volume of solution, multiplied by 100.

Answer

B. The volume of solute divided by the volume of solution, multiplied by 100.

Question 55

Question 55: If 20g of salt is dissolved in 80g of water, what is the mass by mass percentage of the solution?

A. 20%B. 25%C. 80%D. 100%

Question 56

Question 56: What is a suspension?

A. A homogeneous mixture of two or more substances.B. A heterogeneous mixture of two or more substances.C. A pure substance.D. A solution.

Answer

B. A heterogeneous mixture of two or more substances. Suspensions have larger particles that are visible and can settle out. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 57

Question 57: Which of the following is an example of a suspension?

A. SaltwaterB. MilkC. Sand and waterD. Air

Answer

C. Sand and water. The sand particles are visibly distinct and will settle to the bottom over time. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 58

Question 58: What is a characteristic of a suspension?

A. It is homogeneous.B. The particles are smaller than 1 nm in diameter.C. The particles settle down when left undisturbed.D. It does not scatter a beam of light.

Answer

C. The particles settle down when left undisturbed. This is a key distinguishing feature of suspensions. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 59

Question 59: Why do the particles in a suspension settle down?

A. Because they are very small.B. Because they are very large.C. Because they are uniformly distributed.D. Because they are attracted to each other.

Answer

B. Because they are very large. The larger particle size makes them susceptible to gravity, causing them to settle. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 60

Question 60: Can a suspension be separated by filtration?

A. YesB. NoC. Depends on the soluteD. Depends on the solvent

Answer

A. Yes. The larger particles in a suspension can be trapped by a filter. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 61

Question 61: Which of the following is NOT a property of a suspension?

A. It is a heterogeneous mixture.B. The particles are larger than 100 nm in diameter.C. The particles settle down when left undisturbed.D. It does not scatter a beam of light.

Answer

D. It does not scatter a beam of light. Suspensions do scatter a beam of light (Tyndall effect). (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 62

Question 62: What is the approximate size of particles in a suspension?

A. Smaller than 1 nmB. Between 1 nm and 100 nmC. Larger than 100 nmD. 100 nm

Answer

C. Larger than 100 nm. This larger size contributes to their visibility and tendency to settle. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 63

Question 63: Why is the path of light visible in a suspension?

A. Because the particles are too small to scatter light.B. Because the particles are large enough to scatter light.C. Because the suspension is too concentrated.D. Because the suspension is too dilute.

Answer

B. Because the particles are large enough to scatter light. This scattering makes the light beam visible. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 64

Question 64: Is a suspension stable or unstable?

A. StableB. UnstableC. Depends on the soluteD. Depends on the solvent

Answer

B. Unstable. The particles settle out over time, indicating instability. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

D. They are stable. Suspensions are unstable due to particle settling. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

B. A heterogeneous mixture with intermediate-sized particles. Colloids have particles larger than those in solutions but smaller than those in suspensions. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

B. Milk. Milk contains proteins and fat molecules dispersed in water, forming a colloid. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

C. It scatters a beam of light. This phenomenon is known as the Tyndall effect. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

B. The scattering of light by particles in a colloid or suspension. This is what makes a beam of light visible through a colloid. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

B. Because the particles are large enough to scatter light. The intermediate size of the particles allows them to scatter light. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

B. The particles can be seen with the naked eye. Colloidal particles are too small for this. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

B. Between 1 nm and 1000 nm. This size range distinguishes colloids from solutions and suspensions. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

B. Because the particles are large enough to scatter light. This scattering makes the light beam visible. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

A. Stable. The particles in a colloid do not settle out over time. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

C. They can be separated by ordinary filtration. Colloidal particles are too small to be trapped by a standard filter. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

C. Saltwater. Saltwater is a solution. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

A. A colloid with a liquid dispersed phase and a gas dispersion medium. Fog and mist are examples of aerosols. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

D. A colloid with a liquid dispersed phase and a liquid dispersion medium. Milk and face cream are examples of emulsions. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

D. A colloid with a solid dispersed phase and a liquid dispersion medium. Paints and inks are examples of sols. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

C. A colloid with a gas dispersed phase and a liquid dispersion medium. Shaving cream and whipped cream are examples of foams. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

A. A change in which the chemical composition of the substance remains the same. Physical changes only alter the form or appearance of a substance. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

B. A change in which a new substance is formed. Chemical changes result in the formation of new substances with different properties. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

C. Melting of ice. Melting is a change of state, and no new substance is formed. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

D. Burning of a candle. Burning involves combustion, a chemical reaction that produces new substances. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

C. Physical changes do not involve the formation of new substances, while chemical changes do. This is the fundamental distinction between the two types of changes. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

B. Elements and compounds. These are the fundamental building blocks of matter. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

A. A pure substance that cannot be broken down into simpler substances by chemical means. Elements are the simplest forms of pure substances. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

B. A substance made up of two or more elements chemically combined. Compounds have a fixed ratio of elements. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

D. Gold (Au). Gold is found on the periodic table and cannot be broken down further. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

C. Water (H₂O). Water is formed by the chemical combination of hydrogen and oxygen. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

B. An atom. Atoms are the fundamental building blocks of elements. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

C. By their atomic number. The atomic number represents the number of protons in an atom’s nucleus. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

D. Poor conductors of heat and electricity. Metals are known for their excellent conductivity. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

A. An element that has properties of both metals and nonmetals. Metalloids have intermediate properties. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

B. Silicon. Silicon is a common metalloid used in electronics. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

C. It can be separated into its components by physical methods. Compounds require chemical methods for separation. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

A. A shorthand representation of the elements present in a compound and their relative proportions. For example, the chemical formula for water is H₂O. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

B. Because they are formed by a chemical combination of elements. The chemical bonding leads to new properties. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

B. A mixture can be separated into its components by physical methods, while a compound cannot. This reflects the nature of the bonding in each. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Accepted Answer

C. They both are made up of two or more different substances. This is the common feature between mixtures and compounds. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Table of Contents

What is a Mixture?

Question 1: Which of the following is NOT a mixture?A. AirB. MilkC. SaltD. SoilShow ExplanationCorrect Answer: C. Salt. Salt is a compound, not a mixture. (Is Matter Around Us Pure MCQ by Top100MCQ.com) (adsbygoogle=window.adsbygoogle||[]).push({}) (adsbygoogle=window.adsbygoogle||[]).push({})

Question 7: Which of these is a homogeneous mixture?A. A saladB. Salt and pepperC. Sugar dissolved in waterD. Oil and waterShow ExplanationCorrect Answer: C. Sugar dissolved in water. A homogeneous mixture has a uniform composition throughout. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 10: Give an example of a mixture found in nature.A. GoldB. DiamondC. SeawaterD. OxygenShow ExplanationCorrect Answer: C. Seawater. Seawater contains a mixture of salts and water. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Types of Mixtures

Question 13: Which of the following is an example of a heterogeneous mixture?A. SaltwaterB. Sugar dissolved in waterC. Sand and iron filingsD. AirShow ExplanationCorrect Answer: C. Sand and iron filings. You can see the different components. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 14: What is another name for a homogeneous mixture?A. SuspensionB. ColloidC. SolutionD. EmulsionShow ExplanationCorrect Answer: C. Solution. Solutions are homogeneous mixtures. (Is Matter Around Us Pure MCQ by Top100MCQ.com) (adsbygoogle=window.adsbygoogle||[]).push({})

Question 16: Give an example of a solid-solid heterogeneous mixture.A. AirB. SoilC. SaltwaterD. MilkShow ExplanationCorrect Answer: B. Soil. Soil contains a variety of different solid components. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 19: Which of the following is a homogeneous mixture of gases?A. SmokeB. FogC. AirD. CloudShow ExplanationCorrect Answer: C. Air. Air is a mixture of different gases like nitrogen, oxygen, etc. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

What is a Solution

Question 22: In a saltwater solution, what is the solute?A. WaterB. SaltC. Both water and saltD. Neither water nor saltShow ExplanationCorrect Answer: B. Salt. The solute is the substance that dissolves into the solvent. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 24: What is the solvent in a solution of sugar dissolved in water?A. SugarB. WaterC. Both sugar and waterD. Neither sugar nor waterShow ExplanationCorrect Answer: B. Water. The solvent is the substance that dissolves the solute. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 25: Which of the following is NOT a solution?A. LemonadeB. BrassC. AirD. Sand and waterShow ExplanationCorrect Answer: D. Sand and water. Sand and water form a heterogeneous mixture, not a solution. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 27: Which of the following is a solid-solid solution?A. SaltwaterB. BrassC. Soda waterD. MilkShow ExplanationCorrect Answer: B. Brass. Brass is an alloy made by combining copper and zinc. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 29: Which of the following is an example of a liquid-liquid solution?A. AirB. VinegarC. MilkD. BrassShow ExplanationCorrect Answer: B. Vinegar. Vinegar is a solution of acetic acid in water. (Is Matter Around Us Pure MCQ by Top100MCQ.com) (adsbygoogle=window.adsbygoogle||[]).push({})

Question 32: Which of the following is an example of an alloy?A. SaltwaterB. BrassC. Soda waterD. MilkShow ExplanationCorrect Answer: B. Brass. Brass is an alloy of copper and zinc. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Properties of a Solution

Concentration of A Solution

What is a Suspension?

Question 57: Which of the following is an example of a suspension?A. SaltwaterB. MilkC. Sand and waterD. AirShow ExplanationCorrect Answer: C. Sand and water. The sand particles are visibly distinct and will settle to the bottom over time. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 60: Can a suspension be separated by filtration?A. YesB. NoC. Depends on the soluteD. Depends on the solventShow ExplanationCorrect Answer: A. Yes. The larger particles in a suspension can be trapped by a filter. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Properties of a Suspension

What is a Colloidal Solution?

Question 1: Which of the following is NOT a mixture?
A. AirB. MilkC. SaltD. Soil
Show Explanation
Correct Answer: C. Salt. Salt is a compound, not a mixture. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 7: Which of these is a homogeneous mixture?
A. A saladB. Salt and pepperC. Sugar dissolved in waterD. Oil and water
Show Explanation
Correct Answer: C. Sugar dissolved in water. A homogeneous mixture has a uniform composition throughout. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 10: Give an example of a mixture found in nature.
A. GoldB. DiamondC. SeawaterD. Oxygen
Show Explanation
Correct Answer: C. Seawater. Seawater contains a mixture of salts and water. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 13: Which of the following is an example of a heterogeneous mixture?
A. SaltwaterB. Sugar dissolved in waterC. Sand and iron filingsD. Air
Show Explanation
Correct Answer: C. Sand and iron filings. You can see the different components. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 14: What is another name for a homogeneous mixture?
A. SuspensionB. ColloidC. SolutionD. Emulsion
Show Explanation
Correct Answer: C. Solution. Solutions are homogeneous mixtures. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 16: Give an example of a solid-solid heterogeneous mixture.
A. AirB. SoilC. SaltwaterD. Milk
Show Explanation
Correct Answer: B. Soil. Soil contains a variety of different solid components. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 19: Which of the following is a homogeneous mixture of gases?
A. SmokeB. FogC. AirD. Cloud
Show Explanation
Correct Answer: C. Air. Air is a mixture of different gases like nitrogen, oxygen, etc. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 22: In a saltwater solution, what is the solute?
A. WaterB. SaltC. Both water and saltD. Neither water nor salt
Show Explanation
Correct Answer: B. Salt. The solute is the substance that dissolves into the solvent. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 24: What is the solvent in a solution of sugar dissolved in water?
A. SugarB. WaterC. Both sugar and waterD. Neither sugar nor water
Show Explanation
Correct Answer: B. Water. The solvent is the substance that dissolves the solute. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 25: Which of the following is NOT a solution?
A. LemonadeB. BrassC. AirD. Sand and water
Show Explanation
Correct Answer: D. Sand and water. Sand and water form a heterogeneous mixture, not a solution. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 27: Which of the following is a solid-solid solution?
A. SaltwaterB. BrassC. Soda waterD. Milk
Show Explanation
Correct Answer: B. Brass. Brass is an alloy made by combining copper and zinc. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 29: Which of the following is an example of a liquid-liquid solution?
A. AirB. VinegarC. MilkD. Brass
Show Explanation
Correct Answer: B. Vinegar. Vinegar is a solution of acetic acid in water. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 32: Which of the following is an example of an alloy?
A. SaltwaterB. BrassC. Soda waterD. Milk
Show Explanation
Correct Answer: B. Brass. Brass is an alloy of copper and zinc. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 57: Which of the following is an example of a suspension?
A. SaltwaterB. MilkC. Sand and waterD. Air
Show Explanation
Correct Answer: C. Sand and water. The sand particles are visibly distinct and will settle to the bottom over time. (Is Matter Around Us Pure MCQ by Top100MCQ.com)

Question 60: Can a suspension be separated by filtration?
A. YesB. NoC. Depends on the soluteD. Depends on the solvent
Show Explanation
Correct Answer: A. Yes. The larger particles in a suspension can be trapped by a filter. (Is Matter Around Us Pure MCQ by Top100MCQ.com)