Methods of Separation in Everyday Life Chapter 9 Quiz

A mixture of salt, sand, oil and water is given ,which of these sequence can be used to separate salt

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a. Decantation -> Filtration -> Evaporation
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b. Filtration -> Evaporation -> Condensation
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c. Filtration -> boiling ->Decantation
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d. None of the above

Paheli bought some vegetables such as french beans, lady’s finger, green chillies, brinjals and potatoes all mixed in a bag. Which of the following methods of separation would be most appropriate for her to separate them?

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(a) Winnowing
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(b) Sieving
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(c) Threshing
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(d) Hand picking

Boojho’s grandmother is suffering from diabetes. Her doctor advised her to take ‘Lassi’ with less fat content. Which of the following methods would be most appropriate for Boojho to prepare it?

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(a) Filtration
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(b) Decantation
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(c) Churning
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(d) Winnowing

Separation of Substances Which amongst the following methods would be most appropriate to separate grains from bundles of stalks?

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(a) Hand picking
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(b) Winnowing
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(c) Sieving
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(d) Threshing

Paheli asked for a glass of water from Boojho. He gave her a glass of ice cold water. Paheli observed some water droplets on the outer surface of the glass and asked Boojho how these droplets of water were formed? Which of the following should be Boojho’s answer?

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(a) Evaporation of water from the glass.
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(b) Water that seeped out from the glass.
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(c) Evaporation of atmospheric water vapour.
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(d) Condensation of atmospheric water vapour.

While preparing chapatis, Paheli found that the flour to be used was mixed with wheat grains. Which out of the following is the most suitable method to separate the grains from the flour?

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(a) Threshing
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(b) Sieving
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(c) Winnowing
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(d) Filtration

You might have observed the preparation of ghee from butter and cream at home. Which method(s) can be used to separate ghee from the residue? (i) Evaporation (ii) Decantation (iii) Filtration (iv) Churning Which of the following combination is the correct answer?

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(a) (i) and (ii)
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(b) (ii) and (iii)
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(c) (ii) and (iv)
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(d) (iv) only

In an activity, a teacher dissolved a small amount of solid copper sulphate in a tumbler half filled with water. Which method would you use to get back solid copper sulphate from the solution?

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(a) Decantation
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(b) Evaporation
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(c) Sedimentation
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(d) Condensation

What is a mixture?

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A pure substance made of only one type of particle
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A combination of two or more substances that are not chemically combined
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A substance formed by a chemical reaction
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A substance that cannot be separated

Which of the following is an example of a homogeneous mixture?

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Sand and water
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Oil and water
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Salt dissolved in water
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Iron filings and sulfur

What is the name of the porous material used in the filtration process to separate solids from liquids?

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Magnet
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Filter paper
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Evaporating dish
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Funnel only

Which method of separation uses heat to convert a liquid into vapour, leaving behind the dissolved solid?

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Decantation
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Magnetic separation
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Filtration
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Evaporation

Which of the following materials can be separated using a magnet?

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Sand and salt
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Iron filings and sand
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Oil and water
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Sugar and water

A student has a mixture of chalk powder and water. Which method would be most appropriate to separate the chalk powder from the water?

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Evaporation
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Magnetic separation
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Filtration
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Decantation alone

In the decantation method, why is the liquid poured slowly and carefully from one container to another?

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To heat the liquid faster
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To avoid disturbing the settled solid at the bottom
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To mix the solid and liquid together
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To increase the speed of evaporation

A farmer wants to separate iron nails accidentally mixed with wheat grains. Which method should the farmer use and why?

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Filtration, because iron nails dissolve in water
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Evaporation, because iron nails evaporate easily
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Magnetic separation, because iron is attracted to magnets while wheat is not
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Decantation, because iron nails float on water

Which of the following correctly describes a heterogeneous mixture?

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A mixture that has a uniform composition throughout
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A mixture where the components are evenly distributed
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A mixture where the components are not uniformly distributed and can be seen separately
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A mixture that cannot be separated by any physical method

During evaporation, salt water is heated in an evaporating dish. What happens to the water and the salt respectively?

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Water remains; salt evaporates
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Both water and salt evaporate together
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Water evaporates; salt remains in the dish
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Salt dissolves further and both remain in the dish

A student has a mixture of sand, iron filings, and salt dissolved in water. They want to separate all three components. Which sequence of methods would be most logical?

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Filtration → Magnetic separation → Evaporation
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Magnetic separation → Filtration → Evaporation
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Evaporation → Decantation → Magnetic separation
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Decantation → Evaporation → Filtration

Two students are given a mixture of oil and water. Student A uses decantation, and Student B uses filtration. Which student chose the correct method, and why is the other method unsuitable?

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Student B is correct; decantation does not work because oil and water have the same density
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Student A is correct; filtration is unsuitable because oil forms a liquid layer and does not get trapped by filter paper
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Both methods work equally well for separating oil and water
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Student B is correct; filter paper absorbs oil and separates it from water

A scientist needs to obtain pure salt from a mixture of salt water and mud. She first filters the mixture and then evaporates the filtrate. Explain what the filtrate contains and why evaporation is used as the second step.

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The filtrate contains mud; evaporation is used to dry the mud
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The filtrate contains salt water; evaporation is used to remove the water and collect the salt
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The filtrate contains only water; evaporation is used to collect the water vapour
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The filtrate contains mud and salt; evaporation separates them further

A student observes that after filtering a muddy water sample, the water collected still appears slightly coloured. What can be concluded, and what additional step might help obtain cleaner water?

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The filter paper worked perfectly; no additional step is needed
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The mud particles were too large; decantation should be done before filtration next time
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Some very fine particles passed through the filter paper; using a finer filter or repeating filtration may help
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The water is coloured because of evaporation; heating will remove the colour

A mixture contains sugar, sand, and iron filings. A student claims that evaporation alone can separate all three components. Evaluate this claim and identify the correct sequence of methods to separate all three components.

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The claim is correct; evaporation can separate all three at different temperatures
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The claim is incorrect; the correct sequence is magnetic separation to remove iron filings, then dissolving in water and filtering to remove sand, then evaporating to collect sugar
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The claim is incorrect; the correct sequence is filtration first, then evaporation, then magnetic separation
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The claim is correct; heating the mixture will cause each component to separate on its own

Which of the following techniques can we use to separate homogeneous mixtures?

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Crystallisation
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Distillation
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Evaporation
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All of the above

Name the separation technique

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Centrifuge
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Bunsen burner
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Distillation
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Evaporation

True or false: Magnets can be used to separate iron filings from sand

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True
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False

True or false: Filtration can be used to separate substances in a solution

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True
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False

In a salt water solution ...

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Salt is the solute and water is the solvent
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Salt is the solvent and water is the solute

True or false: Sieving can be used to separate a mixture with two solid components of different sizes

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True
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False

True or false: Decanting is a technique that can be used to separate a salt water solution

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True
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False

A mixture of salt, sand, oil and water is given ,which of these sequence can be used to separate salt

Paheli bought some vegetables such as french beans, lady’s finger, green chillies, brinjals and potatoes all mixed in a bag. Which of the following methods of separation would be most appropriate for her to separate them?

Boojho’s grandmother is suffering from diabetes. Her doctor advised her to take ‘Lassi’ with less fat content. Which of the following methods would be most appropriate for Boojho to prepare it?

Separation of Substances Which amongst the following methods would be most appropriate to separate grains from bundles of stalks?

Paheli asked for a glass of water from Boojho. He gave her a glass of ice cold water. Paheli observed some water droplets on the outer surface of the glass and asked Boojho how these droplets of water were formed? Which of the following should be Boojho’s answer?

While preparing chapatis, Paheli found that the flour to be used was mixed with wheat grains. Which out of the following is the most suitable method to separate the grains from the flour?

You might have observed the preparation of ghee from butter and cream at home. Which method(s) can be used to separate ghee from the residue? (i) Evaporation (ii) Decantation (iii) Filtration (iv) Churning Which of the following combination is the correct answer?

In an activity, a teacher dissolved a small amount of solid copper sulphate in a tumbler half filled with water. Which method would you use to get back solid copper sulphate from the solution?

What is a mixture?

Which of the following is an example of a homogeneous mixture?

What is the name of the porous material used in the filtration process to separate solids from liquids?

Which method of separation uses heat to convert a liquid into vapour, leaving behind the dissolved solid?

Which of the following materials can be separated using a magnet?

A student has a mixture of chalk powder and water. Which method would be most appropriate to separate the chalk powder from the water?

In the decantation method, why is the liquid poured slowly and carefully from one container to another?

A farmer wants to separate iron nails accidentally mixed with wheat grains. Which method should the farmer use and why?

Which of the following correctly describes a heterogeneous mixture?

During evaporation, salt water is heated in an evaporating dish. What happens to the water and the salt respectively?

A student has a mixture of sand, iron filings, and salt dissolved in water. They want to separate all three components. Which sequence of methods would be most logical?

Two students are given a mixture of oil and water. Student A uses decantation, and Student B uses filtration. Which student chose the correct method, and why is the other method unsuitable?

A scientist needs to obtain pure salt from a mixture of salt water and mud. She first filters the mixture and then evaporates the filtrate. Explain what the filtrate contains and why evaporation is used as the second step.

A student observes that after filtering a muddy water sample, the water collected still appears slightly coloured. What can be concluded, and what additional step might help obtain cleaner water?

A mixture contains sugar, sand, and iron filings. A student claims that evaporation alone can separate all three components. Evaluate this claim and identify the correct sequence of methods to separate all three components.

Which of the following techniques can we use to separate homogeneous mixtures?

Name the separation technique

True or false: Magnets can be used to separate iron filings from sand

True or false: Filtration can be used to separate substances in a solution

In a salt water solution ...

True or false: Sieving can be used to separate a mixture with two solid components of different sizes

True or false: Decanting is a technique that can be used to separate a salt water solution

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