MCQs

Explanation
Filtration is the process of separating an insoluble solid from a liquid by passing the mixture through a filter paper or a porous material. The solid particles are retained by the filter. While the liquid passes through, resulting in a clear separation of the two.

Explanation
Decantation is the process of carefully pouring a liquid from one container to another, leaving the solid particles that have settled at the bottom of the original container behind. This process is used to separate a liquid from a solid, without disturbing the solid.

Explanation
Water (H2O) is a compound made up of two hydrogen atoms and one oxygen atom. It is a chemical combination of two different elements, which is the definition of a compound.

Explanation
Solids like sand remain suspended in water because they are denser than water. But not dense enough to sink to the bottom immediately. This creates a heterogeneous mixture, where the sand particles remain suspended in the water.

Explanation
Solids like sawdust float on water because they are less dense than water. When sawdust is added to water, it forms a heterogeneous mixture. Where the sawdust particles remain separate from the water and float on the surface.

Explanation
Heat is a form of energy that is transferred from one body to another due to a temperature difference. It is a type of kinetic energy that is transferred through the motion of particles.

Explanation
Temperature is the measurement of the hotness or coldness of an object or substance. It is a physical property that is usually measured in units of Celsius (°C), Fahrenheit (°F), or Kelvin (K).

Explanation
When you put sand, salt, and sawdust in a glass of water, the following things happen: Salt dissolves in water, meaning it breaks down into individual particles that are distributed evenly throughout the water. Sand sinks to the bottom of the glass, because it is denser than water and cannot float or dissolve in it. Sawdust floats on top of the water, because it is less dense than water and is able to remain suspended on the surface.

Explanation
The process of separating solute and solvent from a mixture is generally referred to as Filtration . Filtration is used to separate an insoluble solid (solute) from a liquid (solvent) by passing the mixture through a filter.

Explanation
Filtration is the process of separating an insoluble solid from a liquid by passing the mixture through a filter paper or a porous material. The solid particles are retained by the filter. While the liquid passes through, resulting in a clear separation of the two.

Explanation
Decantation is the process of carefully pouring a liquid from one container to another, leaving the solid particles that have settled at the bottom of the original container behind. This process is used to separate a liquid from a solid, without disturbing the solid.

Explanation
Water (H2O) is a compound made up of two hydrogen atoms and one oxygen atom. It is a chemical combination of two different elements, which is the definition of a compound.

Explanation
Solids like sand remain suspended in water because they are denser than water. But not dense enough to sink to the bottom immediately. This creates a heterogeneous mixture, where the sand particles remain suspended in the water.

Explanation
Solids like sawdust float on water because they are less dense than water. When sawdust is added to water, it forms a heterogeneous mixture. Where the sawdust particles remain separate from the water and float on the surface.

Explanation
Solids like salt (sodium chloride) dissolve in water to form a saltwater mixture or solution . When salt is added to water, the salt particles break apart and distribute evenly throughout the water, creating a homogeneous mixture.

Explanation
Liquids can be converted into solids by cooling , a process known as freezing or solidification. As the temperature decreases, the particles of the liquid slow down and come together, forming a solid.

Explanation
Gases can be converted into liquids by cooling , a process known as condensation . As the temperature decreases, the particles of the gas slow down and come together, forming a liquid.

Explanation
Liquids can be converted into gases by heating , a process known as vaporization or evaporation. As the temperature increases , the particles of the liquid gain energy and move faster, eventually breaking free from the surface tension of the liquid and turning into a gas.

Explanation
Solids can be converted into liquids by heating, a process known as melting. This occurs when the particles of the solid gain enough energy to break free from their fixed positions and start moving freely, resulting in a liquid state.

Explanation
Matter can change from one form to another through various processes, including: Heating : Melting ( solid to liquid ), Vaporization ( liquid to gas ) Cooling : Freezing ( liquid to solid ), Condensation ( gas to liquid ) For example , ice (solid) can change to water (liquid) by heating, and water (liquid) can change to steam (gas) by further heating. Similarly, steam (gas) can change to water (liquid) by cooling, and water (liquid) can change to ice (solid) by further cooling.

Explanation
A solution is a type of mixture that is homogeneous , meaning it has a uniform composition and properties throughout. It is a mixture of two or more substances, where one substance (the solute) is dissolved in another substance (the solvent).

Explanation
Liquids take the shape of a container because they have a fixed volume but no fixed shape . They conform to the shape of the container they are placed in.

Explanation
Solids, liquids, and gases can mix together to form a mixture. Which is a physical combination of two or more substances in which each substance retains its chemical properties.

Explanation
Gases are the state of matter that takes both the shape and volume of a container they are placed in. They expand to fill the container and conform to its shape. Liquids , take the shape of a container but maintain their own volume. Solids maintain both their shape and volume , regardless of the container they are placed in.

Explanation
A gas is a state of matter that has neither a fixed shape nor a fixed volume. It expands to fill its container and takes the shape of its container. Gases are highly compressible and can change shape and volume easily. Liquid : A liquid has a fixed volume but not a fixed shape. Solid : A solid has both a fixed shape and a fixed volume.

Explanation
Liquids can be converted into solids by cooling , a process known as freezing or solidification. As the temperature decreases, the particles of the liquid slow down and come together, forming a solid.

Explanation
Gases can be converted into liquids by cooling , a process known as condensation . As the temperature decreases, the particles of the gas slow down and come together, forming a liquid.

Explanation
Liquids can be converted into gases by heating , a process known as vaporization or evaporation. As the temperature increases , the particles of the liquid gain energy and move faster, eventually breaking free from the surface tension of the liquid and turning into a gas.