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All questions of Separation of Substances for Class 6 Exam
Which method of separation is commonly used to separate a mixture of salt and water?- a)Filtration
- b)Distillation
- c)Evaporation
- d)Chromatography
Correct answer is option 'C'. Can you explain this answer?
a)
Filtration
b)
Distillation
c)
Evaporation
d)
Chromatography
|
Anand Patel answered |
Evaporation
Evaporation is the process commonly used to separate a mixture of salt and water. Here's how it works:
- Process: In this method, the saltwater mixture is heated, causing the water to evaporate and leave the salt behind.
- Evaporation: The water vapor is then collected and condensed back into liquid form, leaving the salt as residue in the original container.
- Separation: This process effectively separates the salt from the water, as the salt remains in solid form while the water evaporates into the air.
- Collection: The collected water can also be further purified through processes like distillation if needed.
Overall, evaporation is a simple and effective method for separating salt and water, making it a common technique used in various industries and laboratories.
Evaporation is the process commonly used to separate a mixture of salt and water. Here's how it works:
- Process: In this method, the saltwater mixture is heated, causing the water to evaporate and leave the salt behind.
- Evaporation: The water vapor is then collected and condensed back into liquid form, leaving the salt as residue in the original container.
- Separation: This process effectively separates the salt from the water, as the salt remains in solid form while the water evaporates into the air.
- Collection: The collected water can also be further purified through processes like distillation if needed.
Overall, evaporation is a simple and effective method for separating salt and water, making it a common technique used in various industries and laboratories.
What property distinguishes a saturated solution from an unsaturated solution?- a)Clarity
- b)Density
- c)Color
- d)Ability to dissolve more solute
Correct answer is option 'D'. Can you explain this answer?
a)
Clarity
b)
Density
c)
Color
d)
Ability to dissolve more solute
|
Manasa Saha answered |
Key Property distinguishing a Saturated Solution from an Unsaturated Solution:
Ability to dissolve more solute:
- The key property that distinguishes a saturated solution from an unsaturated solution is the ability to dissolve more solute.
- In a saturated solution, the solvent has dissolved the maximum amount of solute possible at a given temperature and pressure.
- This means that further addition of solute will not dissolve and will remain as a solid at the bottom of the container.
- On the other hand, in an unsaturated solution, the solvent has not yet dissolved the maximum amount of solute possible at the given conditions.
- Therefore, an unsaturated solution has the ability to dissolve more solute until it reaches a point of saturation.
Other Properties:
- Clarity, density, and color are not definitive properties that distinguish a saturated solution from an unsaturated solution.
- Both saturated and unsaturated solutions can have varying levels of clarity, density, and color depending on the nature of the solute and solvent.
- These properties can be influenced by factors such as impurities, temperature, and concentration, but they do not directly indicate whether a solution is saturated or unsaturated.
Therefore, the ability to dissolve more solute is the key property that differentiates a saturated solution, where no more solute can be dissolved, from an unsaturated solution, which still has the capacity to dissolve additional solute.
Ability to dissolve more solute:
- The key property that distinguishes a saturated solution from an unsaturated solution is the ability to dissolve more solute.
- In a saturated solution, the solvent has dissolved the maximum amount of solute possible at a given temperature and pressure.
- This means that further addition of solute will not dissolve and will remain as a solid at the bottom of the container.
- On the other hand, in an unsaturated solution, the solvent has not yet dissolved the maximum amount of solute possible at the given conditions.
- Therefore, an unsaturated solution has the ability to dissolve more solute until it reaches a point of saturation.
Other Properties:
- Clarity, density, and color are not definitive properties that distinguish a saturated solution from an unsaturated solution.
- Both saturated and unsaturated solutions can have varying levels of clarity, density, and color depending on the nature of the solute and solvent.
- These properties can be influenced by factors such as impurities, temperature, and concentration, but they do not directly indicate whether a solution is saturated or unsaturated.
Therefore, the ability to dissolve more solute is the key property that differentiates a saturated solution, where no more solute can be dissolved, from an unsaturated solution, which still has the capacity to dissolve additional solute.
In the context of separating oil, clean sand, and water, what combination of methods might be necessary?- a)Threshing, winnowing, and settling
- b)Filtration, decanting, and beating
- c)Settling, decanting, and filtration
- d)Beating, winnowing, and drying
Correct answer is option 'C'. Can you explain this answer?
a)
Threshing, winnowing, and settling
b)
Filtration, decanting, and beating
c)
Settling, decanting, and filtration
d)
Beating, winnowing, and drying
|
Akshita Reddy answered |
Separating oil, clean sand, and water:
To separate oil, clean sand, and water, a combination of methods is necessary to effectively isolate each component. The most suitable combination of methods would involve settling, decanting, and filtration. Let's break down each method:
Settling:
- Settling involves allowing the mixture to sit undisturbed so that the different components naturally separate based on their densities. In this case, the oil will float on top of the water, while the sand will settle at the bottom.
Decanting:
- Decanting is the process of carefully pouring off the top layer of the mixture to separate it from the rest. In this case, after settling, the oil can be decanted off the top of the water.
Filtration:
- Filtration can be used to separate the sand from the water. By passing the mixture through a filter, the sand particles are trapped while the water passes through, resulting in clean water.
By combining settling, decanting, and filtration, it is possible to effectively separate oil, clean sand, and water. This method ensures each component is isolated and can be collected separately for further use or disposal.
To separate oil, clean sand, and water, a combination of methods is necessary to effectively isolate each component. The most suitable combination of methods would involve settling, decanting, and filtration. Let's break down each method:
Settling:
- Settling involves allowing the mixture to sit undisturbed so that the different components naturally separate based on their densities. In this case, the oil will float on top of the water, while the sand will settle at the bottom.
Decanting:
- Decanting is the process of carefully pouring off the top layer of the mixture to separate it from the rest. In this case, after settling, the oil can be decanted off the top of the water.
Filtration:
- Filtration can be used to separate the sand from the water. By passing the mixture through a filter, the sand particles are trapped while the water passes through, resulting in clean water.
By combining settling, decanting, and filtration, it is possible to effectively separate oil, clean sand, and water. This method ensures each component is isolated and can be collected separately for further use or disposal.
What is a characteristic property of a pure substance?- a)It can be separated into its components
- b)It has a fixed melting point
- c)It always forms a homogeneous mixture
- d)It can be classified as a heterogeneous mixture
Correct answer is option 'B'. Can you explain this answer?
a)
It can be separated into its components
b)
It has a fixed melting point
c)
It always forms a homogeneous mixture
d)
It can be classified as a heterogeneous mixture
|
Coachify answered |
A characteristic property of a pure substance is that it has a fixed melting point. Unlike mixtures, which can have varying melting points due to the presence of multiple components, pure substances melt or freeze at specific temperatures. This property is utilized in various industries and scientific processes to identify and classify different substances.
What is the primary purpose of sedimentation in the process of separating solid particles from a liquid mixture?- a)To dissolve the solid particles completely
- b)To agitate the mixture vigorously
- c)To allow the solid particles to settle at the bottom
- d)To increase the temperature of the mixture
Correct answer is option 'C'. Can you explain this answer?
a)
To dissolve the solid particles completely
b)
To agitate the mixture vigorously
c)
To allow the solid particles to settle at the bottom
d)
To increase the temperature of the mixture
|
Dr Manju Sen answered |
Sedimentation is used to separate undissolved solid particles from a liquid by allowing the particles to settle at the bottom, forming a layer known as sediment. This process takes advantage of the difference in density between the solid particles and the liquid, leading to the settling of the solid component. It is a fundamental method in various industries such as wastewater treatment and mining for separating solids from liquids based on their different densities.
In the context provided, what is the main function of handpicking in food processing?- a)To grind food grains into a fine powder
- b)To separate solid substances based on their size
- c)To remove unwanted materials from food grains
- d)To separate grains from the stalks or husks
Correct answer is option 'C'. Can you explain this answer?
a)
To grind food grains into a fine powder
b)
To separate solid substances based on their size
c)
To remove unwanted materials from food grains
d)
To separate grains from the stalks or husks
|
Shiksha Academy answered |
Handpicking is a manual method used to separate unwanted materials, such as debris, damaged grains, or foreign objects, from food grains. This process helps in ensuring the quality and purity of the final food product by eliminating any impurities that may have been mixed with the grains during harvesting or storage.
How does the process of separating solids from a mixture benefit us?- a)It increases the volume of the mixture
- b)It improves the taste of the mixture
- c)It helps in removing impurities
- d)It makes the mixture more colorful
Correct answer is option 'C'. Can you explain this answer?
a)
It increases the volume of the mixture
b)
It improves the taste of the mixture
c)
It helps in removing impurities
d)
It makes the mixture more colorful
|
Rohini Seth answered |
The process of separating solids from a mixture benefits us by helping in removing impurities that may be present in the mixture. By separating solids, we can ensure that the mixture is pure and free from any unwanted substances or contaminants. This purity is essential for various applications, such as in food processing, manufacturing, or scientific research, where the quality of the mixture is crucial for the desired outcome.
What is the purpose of threshing in the process of harvesting crops like paddy, wheat, or mustard?- a)To separate chaff from grains
- b)To dry the stalks
- c)To beat the mixture from a height
- d)To carry away the lighter chaff
Correct answer is option 'A'. Can you explain this answer?
a)
To separate chaff from grains
b)
To dry the stalks
c)
To beat the mixture from a height
d)
To carry away the lighter chaff
|
EduRev Class 6 answered |
Threshing is a crucial step in the harvesting process as it is specifically aimed at separating the grain from the chaff. The process involves beating the dried stalks to loosen the grains from the rest of the plant material. This separation is essential for collecting the valuable grains that will be used for various purposes.
In the context of solutions, what does an unsaturated solution have the ability to do?- a)Dissolve all solute added
- b)Dissolve more solute
- c)Reach equilibrium
- d)Precipitate the solute
Correct answer is option 'B'. Can you explain this answer?
a)
Dissolve all solute added
b)
Dissolve more solute
c)
Reach equilibrium
d)
Precipitate the solute
|
Praveen Kumar answered |
An unsaturated solution has the ability to dissolve more solute. This means that it can continue dissolving solute until it becomes saturated. At that point, the solution cannot dissolve any more solute at that temperature and pressure. Understanding this concept is crucial in fields like chemistry and pharmacology where the concentration of solutions plays a significant role in reactions and formulations.
Which method is commonly employed to separate a solid from a liquid mixture?- a)Decantation
- b)Sublimation
- c)Chromatography
- d)Distillation
Correct answer is option 'A'. Can you explain this answer?
a)
Decantation
b)
Sublimation
c)
Chromatography
d)
Distillation
|
|
Praveen Kumar answered |
Decantation is a frequently used method for separating a solid from a liquid mixture. By carefully pouring off the liquid portion while leaving the solid residue behind, decantation allows for the isolation of the solid component from the liquid. This technique is particularly useful when dealing with mixtures where the solid particles settle at the bottom and can be effectively separated through the pouring process.
When might it be necessary to employ multiple methods for separating mixtures effectively?- a)When dealing with homogeneous mixtures
- b)When separating substances with similar densities
- c)When a mixture comprises two immiscible liquids
- d)When using crystallization as the primary separation method
Correct answer is option 'C'. Can you explain this answer?
a)
When dealing with homogeneous mixtures
b)
When separating substances with similar densities
c)
When a mixture comprises two immiscible liquids
d)
When using crystallization as the primary separation method
|
|
Dr Manju Sen answered |
Sometimes, it is essential to utilize more than one method to effectively separate mixtures, especially when dealing with substances that do not readily mix, such as immiscible liquids. In such cases, a combination of techniques like allowing the mixture to settle, carefully pouring off the top layer, and employing filtration may be required to achieve a thorough separation. This multi-step approach ensures a clean and precise division of the components present in the mixture.
When separating insoluble solids from liquids, which process involves allowing the components to settle based on their densities?- a)Filtration
- b)Decanting
- c)Settling
- d)Threshing
Correct answer is option 'C'. Can you explain this answer?
a)
Filtration
b)
Decanting
c)
Settling
d)
Threshing
|
|
Dr Manju Sen answered |
Settling is the process by which insoluble solids are separated from liquids based on their differing densities. By allowing the mixture to stand undisturbed, the heavier solid particles settle at the bottom while the liquid remains above. This method is effective in separating components that do not dissolve in the liquid medium.
How does filtration help in separating insoluble particles from a liquid?- a)By dissolving the particles in the liquid
- b)By evaporating the liquid
- c)By using a filter to catch the insoluble particles
- d)By freezing the mixture
Correct answer is option 'C'. Can you explain this answer?
a)
By dissolving the particles in the liquid
b)
By evaporating the liquid
c)
By using a filter to catch the insoluble particles
d)
By freezing the mixture
|
|
Praveen Kumar answered |
Filtration is a separation technique used to separate insoluble particles from a liquid by passing the mixture through a filter medium. The filter, which could be made of materials like cloth or paper, traps the solid particles while allowing the liquid to pass through. The size of the filter's pores is crucial and depends on the size of the solid particles being separated. Filtration is a common method employed in various industries, including pharmaceuticals, environmental engineering, and food processing.
How do we separate insoluble particles that do not settle easily in a liquid?- a)By adding more water to dilute the mixture
- b)By using a process called loading with substances like alum
- c)By heating the liquid to a high temperature
- d)By filtering the liquid multiple times
Correct answer is option 'B'. Can you explain this answer?
a)
By adding more water to dilute the mixture
b)
By using a process called loading with substances like alum
c)
By heating the liquid to a high temperature
d)
By filtering the liquid multiple times
|
Eduskill Classes answered |
When liquids contain very tiny insoluble particles that do not settle easily, we can use a method called loading. By adding substances like alum to the liquid, the tiny particles attach to it, making them heavy and enabling them to settle quickly. This process aids in the separation of the insoluble particles from the liquid efficiently.
In the context of separation of substances, what role does the process of evaporation play?- a)It separates insoluble particles from a liquid
- b)It helps in separating immiscible liquids
- c)It separates substances dissolved in a liquid
- d)It aids in the purification of metals
Correct answer is option 'C'. Can you explain this answer?
a)
It separates insoluble particles from a liquid
b)
It helps in separating immiscible liquids
c)
It separates substances dissolved in a liquid
d)
It aids in the purification of metals
|
Gunjan Lakhani answered |
The process of evaporation is crucial in separating substances that are dissolved in a liquid. By heating the liquid, the solvent evaporates, leaving behind the dissolved substances. This method is commonly used to obtain solutes or solids from a solution, where the solute can be recovered after the solvent has evaporated.
What property of a solution increases with temperature?- a)Solubility
- b)Viscosity
- c)Boiling point
- d)Density
Correct answer is option 'A'. Can you explain this answer?
a)
Solubility
b)
Viscosity
c)
Boiling point
d)
Density
|
|
Praveen Kumar answered |
Solubility is the property of a substance to dissolve in a solvent at a specific temperature. As the temperature of the solvent increases, the solubility of many solid solutes in liquids also increases. This relationship is crucial in various processes like making hot tea where sugar dissolves more easily in hot water than in cold water due to the increase in solubility with temperature.
How do we separate immiscible liquids from each other?- a)By using a centrifuge
- b)By employing the process of sublimation
- c)Through the method of decantation
- d)By subjecting the mixture to electrolysis
Correct answer is option 'C'. Can you explain this answer?
a)
By using a centrifuge
b)
By employing the process of sublimation
c)
Through the method of decantation
d)
By subjecting the mixture to electrolysis
|
|
EduRev Class 6 answered |
Immiscible liquids, which do not mix with each other, can be separated using the technique of decantation. In this process, the immiscible liquids are allowed to settle, and then carefully poured off, separating the liquids based on their differing densities. Decantation is a simple and effective method for separating immiscible liquids.
What process can be utilized to separate two immiscible liquids like cooking oil and water that form separate layers?- a)Distillation
- b)Filtration
- c)Decantation
- d)Evaporation
Correct answer is option 'C'. Can you explain this answer?
a)
Distillation
b)
Filtration
c)
Decantation
d)
Evaporation
|
|
Dr Manju Sen answered |
Decantation is the process of carefully pouring off one liquid from another when dealing with immiscible liquids that form distinct layers. This method is effective in separating substances like oil and water, where one liquid floats over the other due to varying densities. By skillfully decanting, the lighter liquid can be separated from the heavier one, allowing for a clean division between the two.
In the context of solutions, what term is used to describe a solution that can dissolve more solute at a given temperature?- a)Saturated solution
- b)Unsaturated solution
- c)Supersaturated solution
- d)Concentrated solution
Correct answer is option 'B'. Can you explain this answer?
a)
Saturated solution
b)
Unsaturated solution
c)
Supersaturated solution
d)
Concentrated solution
|
|
Dr Manju Sen answered |
An unsaturated solution is one that has the capacity to dissolve more solute at a particular temperature. In such a solution, the amount of solute present is less than the maximum amount that could be dissolved, allowing for further solute to be added and dissolved. This characteristic distinguishes unsaturated solutions from saturated solutions, where no more solute can be dissolved at that temperature.
What is the purpose of loading in the context of separation processes?- a)To mix solid particles with the liquid
- b)To pour the liquid slowly
- c)To create layers of sediment
- d)To prepare the filter for catching particles
Correct answer is option 'D'. Can you explain this answer?
a)
To mix solid particles with the liquid
b)
To pour the liquid slowly
c)
To create layers of sediment
d)
To prepare the filter for catching particles
|
Subset Academy answered |
Loading in separation processes involves preparing the filter medium to catch and retain particles during filtration. By loading the filter, particles are effectively trapped while the liquid passes through, aiding in the separation of solids from liquids. Proper loading ensures efficient filtration and helps in achieving the desired level of separation based on the particle size and filter medium used.
What is the primary purpose of separating different substances from mixtures?- a)To create new materials
- b)To identify the components of a mixture
- c)To increase the purity of substances
- d)To accelerate chemical reactions
Correct answer is option 'B'. Can you explain this answer?
a)
To create new materials
b)
To identify the components of a mixture
c)
To increase the purity of substances
d)
To accelerate chemical reactions
|
|
Coachify answered |
The primary purpose of separating different substances from mixtures is to identify the components of a mixture. By separating substances, scientists can analyze and study the individual components, which is crucial for various scientific processes and applications. This process allows us to understand the properties of each substance in the mixture and how they can be utilized effectively in different contexts.
Why do we separate substances from a mixture?- a)To make the mixture more colorful
- b)To remove unwanted things
- c)To increase the weight of the mixture
- d)To speed up the chemical reactions
Correct answer is option 'B'. Can you explain this answer?
a)
To make the mixture more colorful
b)
To remove unwanted things
c)
To increase the weight of the mixture
d)
To speed up the chemical reactions
|
|
Subset Academy answered |
We separate substances from a mixture to remove unwanted things that may be mixed with substances we do want. For example, if we find small stones in food grains, we need to separate them. This process helps us ensure that the substances we use are pure and free from contaminants, making them safe for consumption or other purposes. ---
Which of the following is an example of a mixture?- a)Pure water
- b)Sugar
- c)Milk
- d)Iron
Correct answer is option 'C'. Can you explain this answer?
a)
Pure water
b)
Sugar
c)
Milk
d)
Iron
|
|
Subset Academy answered |
Milk is an example of a mixture because it consists of different substances mixed together, such as water, proteins, fats, and minerals. This combination of components gives milk its unique properties and nutritional value. Separating milk into its individual components can allow us to extract valuable substances like proteins and fats for various uses. ---
What technique is employed to separate substances dissolved in liquids?- a)Filtration
- b)Evaporation
- c)Distillation
- d)Magnetization
Correct answer is option 'B'. Can you explain this answer?
a)
Filtration
b)
Evaporation
c)
Distillation
d)
Magnetization
|
|
EduRev Class 6 answered |
The process of evaporation is utilized to separate substances that are dissolved in liquids. Through evaporation, the liquid is heated until it evaporates, leaving behind the dissolved substances. This method is effective in separating solutes from the solvent, based on the differences in their boiling points.
What is the key principle behind decantation as a separation technique?- a)Mixing the solid particles with the liquid
- b)Allowing the solid particles to dissolve in the liquid
- c)Slowly pouring off the liquid without disturbing the settled solid particles
- d)Heating the mixture to a high temperature
Correct answer is option 'C'. Can you explain this answer?
a)
Mixing the solid particles with the liquid
b)
Allowing the solid particles to dissolve in the liquid
c)
Slowly pouring off the liquid without disturbing the settled solid particles
d)
Heating the mixture to a high temperature
|
|
Praveen Kumar answered |
Decantation involves gently pouring off the liquid from a mixture without disturbing the settled solid particles at the bottom. This process is effective for separating liquids from solids that have settled, allowing for a clear separation between the two components. It is commonly used in various processes, such as winemaking, where the clear liquid is carefully poured off from the sediment at the bottom of the container.
How does the process of sieving contribute to food safety and quality control?- a)By grinding food grains into a fine powder
- b)By separating solid substances based on their size
- c)By extracting essential nutrients from the food items
- d)By dissolving solid particles in a liquid
Correct answer is option 'B'. Can you explain this answer?
a)
By grinding food grains into a fine powder
b)
By separating solid substances based on their size
c)
By extracting essential nutrients from the food items
d)
By dissolving solid particles in a liquid
|
|
Shiksha Academy answered |
Sieving plays a crucial role in maintaining food safety and quality control by separating solid substances based on their size. This process helps in removing larger particles, contaminants, or impurities from food items, ensuring that the final product is free from unwanted materials that could compromise its quality or pose health risks. By using sieves with appropriate mesh sizes, food processors can effectively filter out undesirable particles and ensure that the food meets regulatory standards for safety and quality.
Which method is employed to separate chaff from grains through the action of wind?- a)Threshing
- b)Settling
- c)Winnowing
- d)Decanting
Correct answer is option 'C'. Can you explain this answer?
a)
Threshing
b)
Settling
c)
Winnowing
d)
Decanting
|
|
EduRev Class 6 answered |
Winnowing is the method used to separate chaff from grains by utilizing the wind. By dropping the grain-chaff mixture from a height, the lighter chaff is carried away by the wind, leaving behind the heavier grains. This process is effective in separating the two components based on their weight and density.
What is the primary reason for separating useful substances from natural mixtures?- a)To increase waste production
- b)To create new mixtures
- c)To extract valuable materials
- d)To reduce the weight of the mixture
Correct answer is option 'C'. Can you explain this answer?
a)
To increase waste production
b)
To create new mixtures
c)
To extract valuable materials
d)
To reduce the weight of the mixture
|
|
Rohini Seth answered |
Separating useful substances from natural mixtures is done primarily to extract valuable materials that are mixed together. In nature, many mixtures contain more than one useful substance, such as milk or petroleum. By separating these mixtures, we can obtain and utilize these valuable substances for various purposes, such as food production, energy generation, or manufacturing processes. ---
How does threshing contribute to the process of food production?- a)By separating solid substances based on their weight
- b)By grinding food grains into fine powder
- c)By removing unwanted particles and insects from food items
- d)By separating grains from the stalks or husks
Correct answer is option 'D'. Can you explain this answer?
a)
By separating solid substances based on their weight
b)
By grinding food grains into fine powder
c)
By removing unwanted particles and insects from food items
d)
By separating grains from the stalks or husks
|
|
Eduskill Classes answered |
Threshing plays a vital role in food production by separating grains from their stalks or husks. This process is typically employed after harvesting to extract the edible part of the crop, such as wheat or rice grains, from the inedible parts like the straw or chaff. Threshing is a key step in preparing the grains for further processing and consumption.
Which method is typically used to separate a solid from a liquid mixture?- a)Distillation
- b)Sublimation
- c)Filtration
- d)Chromatography
Correct answer is option 'C'. Can you explain this answer?
a)
Distillation
b)
Sublimation
c)
Filtration
d)
Chromatography
|
|
Subset Academy answered |
Filtration is a common method used to separate a solid from a liquid mixture. It involves passing the mixture through a filter medium that allows the liquid to pass through while retaining the solid particles. This process is essential in various industries like wastewater treatment, pharmaceuticals, and food production to isolate desired components from mixtures.
How does the process of distillation work in separating components of a mixture?- a)By heating the mixture to a high temperature
- b)By using a solvent to dissolve one component
- c)By passing the mixture through a filter
- d)By exploiting differences in boiling points
Correct answer is option 'D'. Can you explain this answer?
a)
By heating the mixture to a high temperature
b)
By using a solvent to dissolve one component
c)
By passing the mixture through a filter
d)
By exploiting differences in boiling points
|
Vp Classes answered |
The process of distillation works in separating components of a mixture by exploiting differences in boiling points. When the mixture is heated, the component with the lower boiling point vaporizes first, allowing for separation from the other components. This method is commonly used in various industries to purify substances and separate complex mixtures into their individual components.
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